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data-event-name="pinnable-header.vector-toc.pin">move to sidebar</button> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-unpin-button" data-event-name="pinnable-header.vector-toc.unpin">hide</button> </div> <ul class="vector-toc-contents" id="mw-panel-toc-list"> <li id="toc-mw-content-text" class="vector-toc-list-item vector-toc-level-1"> <a href="#" class="vector-toc-link"> <div class="vector-toc-text">(Top)</div> </a> </li> <li id="toc-Process" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Process"> <div class="vector-toc-text"> <span class="vector-toc-numb">1</span> <span>Process</span> </div> </a> <ul id="toc-Process-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Executable" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Executable"> <div class="vector-toc-text"> <span class="vector-toc-numb">2</span> <span>Executable</span> </div> </a> <ul id="toc-Executable-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Context_of_execution" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Context_of_execution"> <div class="vector-toc-text"> <span class="vector-toc-numb">3</span> <span>Context of execution</span> </div> </a> <button aria-controls="toc-Context_of_execution-sublist" class="cdx-button cdx-button--weight-quiet cdx-button--icon-only vector-toc-toggle"> <span class="vector-icon mw-ui-icon-wikimedia-expand"></span> <span>Toggle Context of execution subsection</span> </button> <ul id="toc-Context_of_execution-sublist" class="vector-toc-list"> <li id="toc-Context_switching" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#Context_switching"> <div class="vector-toc-text"> <span class="vector-toc-numb">3.1</span> <span>Context switching</span> </div> </a> <ul id="toc-Context_switching-sublist" class="vector-toc-list"> </ul> </li> </ul> </li> <li id="toc-Runtime" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Runtime"> <div class="vector-toc-text"> <span class="vector-toc-numb">4</span> <span>Runtime</span> </div> </a> <button aria-controls="toc-Runtime-sublist" class="cdx-button cdx-button--weight-quiet cdx-button--icon-only vector-toc-toggle"> <span class="vector-icon mw-ui-icon-wikimedia-expand"></span> <span>Toggle Runtime subsection</span> </button> <ul id="toc-Runtime-sublist" class="vector-toc-list"> <li id="toc-Implementation_details" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#Implementation_details"> <div class="vector-toc-text"> <span class="vector-toc-numb">4.1</span> <span>Implementation details</span> </div> </a> <ul id="toc-Implementation_details-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Application_errors_(exceptions)" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#Application_errors_(exceptions)"> <div class="vector-toc-text"> <span class="vector-toc-numb">4.2</span> <span>Application errors (exceptions)</span> </div> </a> <ul id="toc-Application_errors_(exceptions)-sublist" class="vector-toc-list"> </ul> </li> </ul> </li> <li id="toc-Runtime_system" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Runtime_system"> <div class="vector-toc-text"> <span class="vector-toc-numb">5</span> <span>Runtime system</span> </div> </a> <ul id="toc-Runtime_system-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Instruction_cycle" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Instruction_cycle"> <div class="vector-toc-text"> <span class="vector-toc-numb">6</span> <span>Instruction cycle</span> </div> </a> <ul id="toc-Instruction_cycle-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Interpreter" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Interpreter"> <div class="vector-toc-text"> <span class="vector-toc-numb">7</span> <span>Interpreter</span> </div> </a> <ul id="toc-Interpreter-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Virtual_machine" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Virtual_machine"> <div class="vector-toc-text"> <span class="vector-toc-numb">8</span> <span>Virtual machine</span> </div> </a> <ul id="toc-Virtual_machine-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-See_also" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#See_also"> <div class="vector-toc-text"> <span class="vector-toc-numb">9</span> <span>See also</span> </div> </a> <ul id="toc-See_also-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-References" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#References"> <div class="vector-toc-text"> <span class="vector-toc-numb">10</span> <span>References</span> </div> </a> <ul id="toc-References-sublist" class="vector-toc-list"> </ul> </li> </ul> </div> </div> </nav> </div> </div> <div class="mw-content-container"> <main id="content" class="mw-body"> <header class="mw-body-header vector-page-titlebar"> <nav aria-label="Contents" class="vector-toc-landmark"> <div id="vector-page-titlebar-toc" class="vector-dropdown vector-page-titlebar-toc vector-button-flush-left" > <input type="checkbox" id="vector-page-titlebar-toc-checkbox" role="button" aria-haspopup="true" data-event-name="ui.dropdown-vector-page-titlebar-toc" class="vector-dropdown-checkbox " aria-label="Toggle the table of contents" > <label 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href="https://fa.wikipedia.org/wiki/%D8%A7%D8%AC%D8%B1%D8%A7_(%D8%B1%D8%A7%DB%8C%D8%A7%D9%86%D8%B4)" title="اجرا (رایانش) – Persian" lang="fa" hreflang="fa" data-title="اجرا (رایانش)" data-language-autonym="فارسی" data-language-local-name="Persian" class="interlanguage-link-target"><span>فارسی</span></a></li><li class="interlanguage-link interwiki-fr mw-list-item"><a href="https://fr.wikipedia.org/wiki/Ex%C3%A9cution_(informatique)" title="Exécution (informatique) – French" lang="fr" hreflang="fr" data-title="Exécution (informatique)" data-language-autonym="Français" data-language-local-name="French" class="interlanguage-link-target"><span>Français</span></a></li><li class="interlanguage-link interwiki-ko mw-list-item"><a href="https://ko.wikipedia.org/wiki/%EC%8B%A4%ED%96%89" title="실행 – Korean" lang="ko" hreflang="ko" data-title="실행" data-language-autonym="한국어" data-language-local-name="Korean" class="interlanguage-link-target"><span>한국어</span></a></li><li class="interlanguage-link interwiki-hy mw-list-item"><a href="https://hy.wikipedia.org/wiki/%D4%BE%D6%80%D5%A1%D5%A3%D6%80%D5%AB_%D5%AF%D5%A1%D5%BF%D5%A1%D6%80%D5%B8%D6%82%D5%B4" title="Ծրագրի կատարում – Armenian" lang="hy" hreflang="hy" data-title="Ծրագրի կատարում" data-language-autonym="Հայերեն" data-language-local-name="Armenian" class="interlanguage-link-target"><span>Հայերեն</span></a></li><li class="interlanguage-link interwiki-id mw-list-item"><a href="https://id.wikipedia.org/wiki/Eksekusi_(komputasi)" title="Eksekusi (komputasi) – Indonesian" lang="id" hreflang="id" data-title="Eksekusi (komputasi)" data-language-autonym="Bahasa Indonesia" data-language-local-name="Indonesian" class="interlanguage-link-target"><span>Bahasa Indonesia</span></a></li><li class="interlanguage-link interwiki-it mw-list-item"><a href="https://it.wikipedia.org/wiki/Esecuzione_(informatica)" title="Esecuzione (informatica) – Italian" lang="it" hreflang="it" data-title="Esecuzione (informatica)" data-language-autonym="Italiano" data-language-local-name="Italian" class="interlanguage-link-target"><span>Italiano</span></a></li><li class="interlanguage-link interwiki-ka mw-list-item"><a href="https://ka.wikipedia.org/wiki/%E1%83%A8%E1%83%94%E1%83%A1%E1%83%A0%E1%83%A3%E1%83%9A%E1%83%94%E1%83%91%E1%83%90_(%E1%83%98%E1%83%9C%E1%83%A4%E1%83%9D%E1%83%A0%E1%83%9B%E1%83%90%E1%83%A2%E1%83%98%E1%83%99%E1%83%90)" title="შესრულება (ინფორმატიკა) – Georgian" lang="ka" hreflang="ka" data-title="შესრულება (ინფორმატიკა)" data-language-autonym="ქართული" data-language-local-name="Georgian" class="interlanguage-link-target"><span>ქართული</span></a></li><li class="interlanguage-link interwiki-ja mw-list-item"><a href="https://ja.wikipedia.org/wiki/%E5%AE%9F%E8%A1%8C_(%E3%82%B3%E3%83%B3%E3%83%94%E3%83%A5%E3%83%BC%E3%82%BF)" title="実行 (コンピュータ) – Japanese" lang="ja" hreflang="ja" data-title="実行 (コンピュータ)" data-language-autonym="日本語" data-language-local-name="Japanese" class="interlanguage-link-target"><span>日本語</span></a></li><li class="interlanguage-link interwiki-no mw-list-item"><a href="https://no.wikipedia.org/wiki/Utf%C3%B8relse" title="Utførelse – Norwegian Bokmål" lang="nb" hreflang="nb" data-title="Utførelse" data-language-autonym="Norsk bokmål" data-language-local-name="Norwegian Bokmål" class="interlanguage-link-target"><span>Norsk bokmål</span></a></li><li class="interlanguage-link interwiki-pt mw-list-item"><a href="https://pt.wikipedia.org/wiki/Execu%C3%A7%C3%A3o_(computa%C3%A7%C3%A3o)" title="Execução (computação) – Portuguese" lang="pt" hreflang="pt" data-title="Execução (computação)" data-language-autonym="Português" data-language-local-name="Portuguese" class="interlanguage-link-target"><span>Português</span></a></li><li class="interlanguage-link interwiki-ckb mw-list-item"><a href="https://ckb.wikipedia.org/wiki/%D8%A8%DB%95%DA%95%DB%8E%D9%88%DB%95%DA%86%D9%88%D9%88%D9%86_(%DA%BE%DB%95%DA%98%D9%85%D8%A7%D8%B1%DA%A9%D8%A7%D8%B1%DB%8C%DB%8C)" title="بەڕێوەچوون (ھەژمارکاریی) – Central Kurdish" lang="ckb" hreflang="ckb" data-title="بەڕێوەچوون (ھەژمارکاریی)" data-language-autonym="کوردی" data-language-local-name="Central Kurdish" class="interlanguage-link-target"><span>کوردی</span></a></li><li class="interlanguage-link interwiki-sr mw-list-item"><a href="https://sr.wikipedia.org/wiki/%D0%98%D0%B7%D0%B2%D1%80%D1%88%D0%B0%D0%B2%D0%B0%D1%9A%D0%B5_(%D1%80%D0%B0%D1%87%D1%83%D0%BD%D0%B0%D1%80%D1%81%D1%82%D0%B2%D0%BE)" title="Извршавање (рачунарство) – Serbian" lang="sr" hreflang="sr" data-title="Извршавање (рачунарство)" data-language-autonym="Српски / srpski" data-language-local-name="Serbian" class="interlanguage-link-target"><span>Српски / srpski</span></a></li><li class="interlanguage-link interwiki-sv mw-list-item"><a href="https://sv.wikipedia.org/wiki/Exekvering" title="Exekvering – Swedish" lang="sv" hreflang="sv" data-title="Exekvering" data-language-autonym="Svenska" data-language-local-name="Swedish" class="interlanguage-link-target"><span>Svenska</span></a></li><li class="interlanguage-link interwiki-vi mw-list-item"><a href="https://vi.wikipedia.org/wiki/Th%E1%BB%B1c_thi_(%C4%91i%E1%BB%87n_to%C3%A1n)" title="Thực thi (điện toán) – Vietnamese" lang="vi" hreflang="vi" data-title="Thực thi (điện toán)" data-language-autonym="Tiếng Việt" data-language-local-name="Vietnamese" class="interlanguage-link-target"><span>Tiếng Việt</span></a></li><li class="interlanguage-link interwiki-zh-yue mw-list-item"><a href="https://zh-yue.wikipedia.org/wiki/%E7%A8%8B%E5%BC%8F%E5%9F%B7%E8%A1%8C" title="程式執行 – Cantonese" lang="yue" hreflang="yue" data-title="程式執行" data-language-autonym="粵語" data-language-local-name="Cantonese" class="interlanguage-link-target"><span>粵語</span></a></li> </ul> <div class="after-portlet after-portlet-lang"><span class="wb-langlinks-edit wb-langlinks-link"><a href="https://www.wikidata.org/wiki/Special:EntityPage/Q1077724#sitelinks-wikipedia" title="Edit interlanguage links" class="wbc-editpage">Edit links</a></span></div> </div> </div> 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.sidebar-list-title,html.skin-theme-clientpref-night .mw-parser-output .sidebar:not(.notheme) .sidebar-title-with-pretitle{background:transparent!important}html.skin-theme-clientpref-night .mw-parser-output .sidebar:not(.notheme) .sidebar-title-with-pretitle a{color:var(--color-progressive)!important}}@media screen and (prefers-color-scheme:dark){html.skin-theme-clientpref-os .mw-parser-output .sidebar:not(.notheme) .sidebar-list-title,html.skin-theme-clientpref-os .mw-parser-output .sidebar:not(.notheme) .sidebar-title-with-pretitle{background:transparent!important}html.skin-theme-clientpref-os .mw-parser-output .sidebar:not(.notheme) .sidebar-title-with-pretitle a{color:var(--color-progressive)!important}}@media print{body.ns-0 .mw-parser-output .sidebar{display:none!important}}</style><table class="sidebar nomobile nowraplinks" style="margin-top: 0.5em;"><tbody><tr><th class="sidebar-title" style="background-color: rgba(51, 153, 255, 0.15);"><a class="mw-selflink selflink">Program execution</a></th></tr><tr><th class="sidebar-heading" style="background-color: rgba(51, 153, 255, 0.15);"> General concepts</th></tr><tr><td class="sidebar-content" style="text-align: left;"> <ul><li><a href="/wiki/Computer_program" title="Computer program">Code</a></li> <li><a href="/wiki/Translator_(computing)" title="Translator (computing)">Translation</a> <ul><li><a href="/wiki/Compiler" title="Compiler">Compiler</a> <ul><li><a href="/wiki/Compile_time" title="Compile time">Compile time</a></li></ul></li> <li><a href="/wiki/Optimizing_compiler" title="Optimizing compiler">Optimizing compiler</a></li></ul></li> <li><a href="/wiki/Intermediate_representation" title="Intermediate representation">Intermediate representation</a> (IR)</li> <li><a class="mw-selflink selflink">Execution</a> <ul><li><a href="/wiki/Runtime_system" title="Runtime system">Runtime system</a> <ul><li><a class="mw-selflink-fragment" href="#Runtime">Runtime</a></li></ul></li> <li><a href="/wiki/Executable" title="Executable">Executable</a></li> <li><a href="/wiki/Interpreter_(computing)" title="Interpreter (computing)">Interpreter</a></li> <li><a href="/wiki/Virtual_machine" title="Virtual machine">Virtual machine</a></li></ul></li></ul></td> </tr><tr><th class="sidebar-heading" style="background-color: rgba(51, 153, 255, 0.15);"> Types of code</th></tr><tr><td class="sidebar-content" style="text-align: left;"> <ul><li><a href="/wiki/Source_code" title="Source code">Source code</a></li> <li><a href="/wiki/Object_code" title="Object code">Object code</a></li> <li><a href="/wiki/Bytecode" title="Bytecode">Bytecode</a></li> <li><a href="/wiki/Machine_code" title="Machine code">Machine code</a></li> <li><a href="/wiki/Microcode" title="Microcode">Microcode</a></li></ul></td> </tr><tr><th class="sidebar-heading" style="background-color: rgba(51, 153, 255, 0.15);"> Compilation strategies</th></tr><tr><td class="sidebar-content" style="text-align: left;"> <ul><li><a href="/wiki/Ahead-of-time_compilation" title="Ahead-of-time compilation">Ahead-of-time</a> (AOT)</li> <li><a href="/wiki/Just-in-time_compilation" title="Just-in-time compilation">Just-in-time</a> (JIT) <ul><li><a href="/wiki/Tracing_just-in-time_compilation" title="Tracing just-in-time compilation">Tracing just-in-time</a></li> <li><a href="/wiki/Compile_and_go_system" title="Compile and go system">Compile and go system</a></li></ul></li> <li><a href="/wiki/Precompilation" class="mw-redirect" title="Precompilation">Precompilation</a></li> <li><a href="/wiki/Source-to-source_compiler" title="Source-to-source compiler">Transcompilation</a></li> <li><a href="/wiki/Dynamic_recompilation" title="Dynamic recompilation">Recompilation</a></li></ul></td> </tr><tr><th class="sidebar-heading" style="background-color: rgba(51, 153, 255, 0.15);"> Notable runtimes</th></tr><tr><td class="sidebar-content" style="text-align: left;"> <ul><li><a href="/wiki/Android_Runtime" title="Android Runtime">Android Runtime</a> (ART)</li> <li><a href="/wiki/BEAM_(Erlang_virtual_machine)" title="BEAM (Erlang virtual machine)">BEAM</a> (Erlang)</li> <li><a href="/wiki/Common_Language_Runtime" title="Common Language Runtime">Common Language Runtime</a> (CLR) and <a href="/wiki/Mono_(software)#Code_Execution_Engine" title="Mono (software)">Mono</a></li> <li><a href="/wiki/CPython" title="CPython">CPython</a> and <a href="/wiki/PyPy" title="PyPy">PyPy</a></li> <li><a href="/wiki/Crt0" title="Crt0">crt0</a> (<a href="/wiki/C_(programming_language)" title="C (programming language)">C</a> target-specific initializer)</li> <li><a href="/wiki/Java_virtual_machine" title="Java virtual machine">Java virtual machine</a> (JVM)</li> <li><a href="/wiki/LuaJIT" title="LuaJIT">LuaJIT</a></li> <li><a href="/wiki/Objective-C" title="Objective-C">Objective-C</a> and <a href="/wiki/Swift_(programming_language)" title="Swift (programming language)">Swift</a>'s</li> <li><a href="/wiki/V8_(JavaScript_engine)" title="V8 (JavaScript engine)">V8</a> and <a href="/wiki/Node.js" title="Node.js">Node.js</a></li> <li><a href="/wiki/Zend_Engine" title="Zend Engine">Zend Engine</a> (PHP)</li></ul></td> </tr><tr><th class="sidebar-heading" style="background-color: rgba(51, 153, 255, 0.15);"> Notable compilers & toolchains</th></tr><tr><td class="sidebar-content" style="text-align: left;"> <ul><li><a href="/wiki/GNU_Compiler_Collection" title="GNU Compiler Collection">GNU Compiler Collection</a> (GCC)</li> <li><a href="/wiki/LLVM" title="LLVM">LLVM</a> and <a href="/wiki/Clang" title="Clang">Clang</a></li> <li><a href="/wiki/Microsoft_Visual_C%2B%2B" title="Microsoft Visual C++">MSVC</a></li></ul></td> </tr><tr><td class="sidebar-navbar"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1129693374"><style data-mw-deduplicate="TemplateStyles:r1239400231">.mw-parser-output .navbar{display:inline;font-size:88%;font-weight:normal}.mw-parser-output .navbar-collapse{float:left;text-align:left}.mw-parser-output .navbar-boxtext{word-spacing:0}.mw-parser-output .navbar ul{display:inline-block;white-space:nowrap;line-height:inherit}.mw-parser-output .navbar-brackets::before{margin-right:-0.125em;content:"[ "}.mw-parser-output .navbar-brackets::after{margin-left:-0.125em;content:" ]"}.mw-parser-output .navbar li{word-spacing:-0.125em}.mw-parser-output .navbar a>span,.mw-parser-output .navbar a>abbr{text-decoration:inherit}.mw-parser-output .navbar-mini abbr{font-variant:small-caps;border-bottom:none;text-decoration:none;cursor:inherit}.mw-parser-output .navbar-ct-full{font-size:114%;margin:0 7em}.mw-parser-output .navbar-ct-mini{font-size:114%;margin:0 4em}html.skin-theme-clientpref-night .mw-parser-output .navbar li a abbr{color:var(--color-base)!important}@media(prefers-color-scheme:dark){html.skin-theme-clientpref-os .mw-parser-output .navbar li a abbr{color:var(--color-base)!important}}@media print{.mw-parser-output .navbar{display:none!important}}</style><div class="navbar plainlinks hlist navbar-mini"><ul><li class="nv-view"><a href="/wiki/Template:Program_execution" title="Template:Program execution"><abbr title="View this template">v</abbr></a></li><li class="nv-talk"><a href="/wiki/Template_talk:Program_execution" title="Template talk:Program execution"><abbr title="Discuss this template">t</abbr></a></li><li class="nv-edit"><a href="/wiki/Special:EditPage/Template:Program_execution" title="Special:EditPage/Template:Program execution"><abbr title="Edit this template">e</abbr></a></li></ul></div></td></tr></tbody></table> <p><b>Execution</b> in <a href="/wiki/Computer_engineering" title="Computer engineering">computer</a> and software engineering is the process by which a <a href="/wiki/Computer" title="Computer">computer</a> or <a href="/wiki/Virtual_machine" title="Virtual machine">virtual machine</a> interprets and acts on the instructions of a <a href="/wiki/Computer_program" title="Computer program">computer program</a>. Each instruction of a program is a description of a particular action which must be carried out, in order for a specific problem to be solved. Execution involves repeatedly following a "<a href="/wiki/Instruction_cycle" title="Instruction cycle">fetch–decode–execute</a>" cycle for each instruction done by the <a href="/wiki/Control_unit" title="Control unit">control unit</a>. As the executing machine follows the instructions, specific effects are produced in accordance with the <a href="/wiki/Formal_semantics_of_programming_languages" class="mw-redirect" title="Formal semantics of programming languages">semantics</a> of those instructions. </p><p>Programs for a computer may be executed in a <a href="/wiki/Batch_processing" title="Batch processing">batch process</a> without human interaction or a <a href="/wiki/User_(computing)" title="User (computing)">user</a> may type <a href="/wiki/Command_(computing)" title="Command (computing)">commands</a> in an <a href="/wiki/Session_(computer_science)" title="Session (computer science)">interactive session</a> of an <a href="/wiki/Interpreter_(computing)" title="Interpreter (computing)">interpreter</a>. In this case, the "commands" are simply program instructions, whose execution is chained together. </p><p>The term <b>run</b> is used almost synonymously. A related meaning of both "to run" and "to execute" refers to the specific action of a user starting (or <i>launching</i> or <i>invoking</i>) a program, as in "Please run the application." </p> <meta property="mw:PageProp/toc" /> <div class="mw-heading mw-heading2"><h2 id="Process">Process</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Execution_(computing)&action=edit&section=1" title="Edit section: Process"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <style data-mw-deduplicate="TemplateStyles:r1236090951">.mw-parser-output .hatnote{font-style:italic}.mw-parser-output div.hatnote{padding-left:1.6em;margin-bottom:0.5em}.mw-parser-output .hatnote i{font-style:normal}.mw-parser-output .hatnote+link+.hatnote{margin-top:-0.5em}@media print{body.ns-0 .mw-parser-output .hatnote{display:none!important}}</style><div role="note" class="hatnote navigation-not-searchable">Further information: <a href="/wiki/Program_lifecycle_phase" title="Program lifecycle phase">Program lifecycle phase</a></div> <p>Prior to execution, a program must first be written. This is generally done in <a href="/wiki/Source_code" title="Source code">source code</a>, which is then compiled at <a href="/wiki/Compile_time" title="Compile time">compile time</a> (and statically linked at <a href="/wiki/Link_time" title="Link time">link time</a>) to produce an executable. This executable is then invoked, most often by an operating system, which loads the program into memory (<a href="/wiki/Load_time" class="mw-redirect" title="Load time">load time</a>), possibly performs <a href="/wiki/Dynamic_linking" class="mw-redirect" title="Dynamic linking">dynamic linking</a>, and then begins execution by moving control to the <a href="/wiki/Entry_point" title="Entry point">entry point</a> of the program; all these steps depend on the <a href="/wiki/Application_Binary_Interface" class="mw-redirect" title="Application Binary Interface">Application Binary Interface</a> of the operating system. At this point execution begins and the program enters <a href="/wiki/Run_time_(program_lifecycle_phase)" class="mw-redirect" title="Run time (program lifecycle phase)">run time</a>. The program then runs until it ends, either in a normal <a href="/wiki/Termination_(computer_science)" class="mw-redirect" title="Termination (computer science)">termination</a> or a <a href="/wiki/Crash_(computing)" title="Crash (computing)">crash</a>. </p> <div class="mw-heading mw-heading2"><h2 id="Executable">Executable</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Execution_(computing)&action=edit&section=2" title="Edit section: Executable"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1236090951"><div role="note" class="hatnote navigation-not-searchable">Main article: <a href="/wiki/Executable" title="Executable">Executable</a></div> <p><i>Executable code</i>, an <i>executable file</i>, or an <i>executable program</i>, sometimes simply referred to as an <i>executable</i> or <i>binary</i>, is a list of instructions and data to cause a computer "to perform indicated tasks according to encoded <a href="/wiki/Instruction_(computer_science)" class="mw-redirect" title="Instruction (computer science)">instructions</a>",<sup id="cite_ref-1" class="reference"><a href="#cite_note-1"><span class="cite-bracket">[</span>1<span class="cite-bracket">]</span></a></sup> as opposed to a <a href="/wiki/Data_(computing)" class="mw-redirect" title="Data (computing)">data file</a> that must be interpreted (<a href="/wiki/Parser" class="mw-redirect" title="Parser">parsed</a>) by a program to be meaningful. </p><p>The exact interpretation depends upon the use. "Instructions" is traditionally taken to mean <a href="/wiki/Machine_code" title="Machine code">machine code</a> instructions for a physical <a href="/wiki/Central_processing_unit" title="Central processing unit">CPU</a>.<sup id="cite_ref-2" class="reference"><a href="#cite_note-2"><span class="cite-bracket">[</span>2<span class="cite-bracket">]</span></a></sup> In some contexts, a file containing scripting instructions (such as <a href="/wiki/Bytecode" title="Bytecode">bytecode</a>) may also be considered executable. </p> <div class="mw-heading mw-heading2"><h2 id="Context_of_execution">Context of execution</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Execution_(computing)&action=edit&section=3" title="Edit section: Context of execution"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>The context in which execution takes place is crucial. Very few programs execute on a <a href="/wiki/Bare_machine" title="Bare machine">bare machine</a>. Programs usually contain implicit and explicit assumptions about resources available at the time of execution. Most programs execute within <a href="/wiki/Computer_multitasking" title="Computer multitasking">multitasking</a> <a href="/wiki/Operating_system" title="Operating system">operating system</a> and <a href="/wiki/Runtime_library" title="Runtime library">run-time libraries</a> specific to the source language that provide crucial services not supplied directly by the computer itself. This supportive environment, for instance, usually decouples a program from direct manipulation of the computer peripherals, providing more general, abstract services instead. </p> <div class="mw-heading mw-heading3"><h3 id="Context_switching">Context switching</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Execution_(computing)&action=edit&section=4" title="Edit section: Context switching"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1236090951"><div role="note" class="hatnote navigation-not-searchable">Main article: <a href="/wiki/Context_switch" title="Context switch">Context switch</a></div> <p>In order for programs and <a href="/wiki/Interrupt_handler" title="Interrupt handler">interrupt handlers</a> to work without interference and share the same hardware memory and access to the I/O system, in a <a href="/wiki/Computer_multitasking" title="Computer multitasking">multitasking operating system</a> running on a digital system with a single CPU/MCU, it is required to have some sort of software and hardware facilities to keep track of an executing process's data (memory page addresses, registers etc.) and to save and recover them back to the state they were in before they were suspended. This is achieved by a context switching.<sup id="cite_ref-:0_3-0" class="reference"><a href="#cite_note-:0-3"><span class="cite-bracket">[</span>3<span class="cite-bracket">]</span></a></sup><sup class="reference nowrap"><span title="Location: 3.3">: 3.3 </span></sup><sup id="cite_ref-4" class="reference"><a href="#cite_note-4"><span class="cite-bracket">[</span>4<span class="cite-bracket">]</span></a></sup> The running programs are often assigned a <a href="/wiki/Process-context_identifier" class="mw-redirect" title="Process-context identifier">Process Context IDentifiers</a> (PCID). </p><p>In Linux-based operating systems, a set of data stored in <a href="/wiki/Processor_register" title="Processor register">registers</a> is usually saved into a process descriptor in memory to implement switching of context.<sup id="cite_ref-:0_3-1" class="reference"><a href="#cite_note-:0-3"><span class="cite-bracket">[</span>3<span class="cite-bracket">]</span></a></sup> PCIDs are also used. </p> <div class="mw-heading mw-heading2"><h2 id="Runtime">Runtime</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Execution_(computing)&action=edit&section=5" title="Edit section: Runtime"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p><b>Runtime</b>, <b>run time</b>, or <b>execution time</b> is the final phase of a <a href="/wiki/Computer_program" title="Computer program">computer program</a><span class="nowrap" style="padding-left:0.1em;">'</span>s <a href="/wiki/Program_lifecycle_phase" title="Program lifecycle phase">life cycle</a>, in which the code is being executed on the computer's <a href="/wiki/Central_processing_unit" title="Central processing unit">central processing unit</a> (CPU) as <a href="/wiki/Machine_code" title="Machine code">machine code</a>. In other words, "runtime" is the running phase of a program. </p><p>A <a href="/wiki/Runtime_error_detection" title="Runtime error detection">runtime error is detected</a> after or during the execution (running state) of a program, whereas a <a href="/wiki/Compile_time" title="Compile time">compile-time</a> error is detected by the <a href="/wiki/Compiler" title="Compiler">compiler</a> before the program is ever executed. <a href="/wiki/Type_checking" class="mw-redirect" title="Type checking">Type checking</a>, <a href="/wiki/Register_allocation" title="Register allocation">register allocation</a>, <a href="/wiki/Code_generation_(compiler)" title="Code generation (compiler)">code generation</a>, and code optimization are typically done at compile time, but may be done at runtime depending on the particular language and compiler. Many other runtime errors exist and are handled differently by different <a href="/wiki/Programming_language" title="Programming language">programming languages</a>, such as <a href="/wiki/Division_by_zero" title="Division by zero">division by zero</a> errors, domain errors, <a href="/wiki/Bounds_checking" title="Bounds checking">array subscript out of bounds</a> errors, <a href="/wiki/Arithmetic_underflow" title="Arithmetic underflow">arithmetic underflow</a> errors, several types of underflow and <a href="/wiki/Overflow_(disambiguation)" class="mw-redirect mw-disambig" title="Overflow (disambiguation)">overflow</a> errors, and many other runtime errors generally considered as software bugs which may or may not be caught and handled by any particular computer language. </p> <div class="mw-heading mw-heading3"><h3 id="Implementation_details">Implementation details</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Execution_(computing)&action=edit&section=6" title="Edit section: Implementation details"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>When a program is to be executed, a <a href="/wiki/Loader_(computing)" title="Loader (computing)">loader</a> first performs the necessary <a href="/wiki/Memory_(computers)" class="mw-redirect" title="Memory (computers)">memory</a> setup and links the program with any <a href="/wiki/Dynamic_linking" class="mw-redirect" title="Dynamic linking">dynamically linked</a> <a href="/wiki/Software_library" class="mw-redirect" title="Software library">libraries</a> it needs, and then the execution begins starting from the program's <a href="/wiki/Entry_point" title="Entry point">entry point</a>. In some cases, a language or implementation will have these tasks done by the language runtime instead, though this is unusual in mainstream languages on common consumer operating systems. </p><p>Some program debugging can only be performed (or is more efficient or accurate when performed) at runtime. <a href="/wiki/Logic_error" title="Logic error">Logic errors</a> and <a href="/wiki/Array_data_structure" class="mw-redirect" title="Array data structure">array</a> bounds checking are examples. For this reason, some programming <a href="/wiki/Software_bug" title="Software bug">bugs</a> are not discovered until the program is tested in a <a href="/wiki/Production_environment" class="mw-redirect" title="Production environment">production environment</a> with real data, despite sophisticated compile-time checking and pre-release testing. In this case, the end-user may encounter a "runtime error" message. </p> <div class="mw-heading mw-heading3"><h3 id="Application_errors_(exceptions)"><span id="Application_errors_.28exceptions.29"></span>Application errors (exceptions)</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Execution_(computing)&action=edit&section=7" title="Edit section: Application errors (exceptions)"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p><a href="/wiki/Exception_handling" title="Exception handling">Exception handling</a> is one language feature designed to handle runtime errors, providing a structured way to catch completely unexpected situations as well as predictable errors or unusual results without the amount of inline error checking required of languages without it. More recent advancements in runtime engines enable <a href="/wiki/Automated_exception_handling" title="Automated exception handling">automated exception handling</a> which provides "root-cause" debug information for every exception of interest and is implemented independent of the source code, by attaching a special software product to the runtime engine. </p> <div class="mw-heading mw-heading2"><h2 id="Runtime_system">Runtime system</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Execution_(computing)&action=edit&section=8" title="Edit section: Runtime system"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1236090951"><div role="note" class="hatnote navigation-not-searchable">Main article: <a href="/wiki/Runtime_system" title="Runtime system">Runtime system</a></div> <p>A <i>runtime system</i>, also called <i>runtime environment</i>, primarily implements portions of an <a href="/wiki/Execution_model" title="Execution model">execution model</a>.<sup class="noprint Inline-Template" style="margin-left:0.1em; white-space:nowrap;">[<i><a href="/wiki/Wikipedia:Please_clarify" title="Wikipedia:Please clarify"><span title="(May 2020)">clarification needed</span></a></i>]</sup> This is not to be confused with the <a href="/wiki/Run_time_(program_lifecycle_phase)" class="mw-redirect" title="Run time (program lifecycle phase)">runtime</a> lifecycle phase of a program, during which the runtime system is in operation. When treating the <i>runtime system</i> as distinct from the <i>runtime environment</i> (RTE), the first may be defined as a specific part of the <a href="/wiki/Integrated_development_environment" title="Integrated development environment">application software (IDE) used for programming</a>, a piece of software that provides the programmer a more convenient environment for running programs during their production (<a href="/wiki/Software_testing" title="Software testing">testing</a> and similar), while the second (RTE) would be the very <a href="/wiki/Instance_(computer_science)" title="Instance (computer science)">instance</a> of an execution model being applied to the developed program which is itself then run in the aforementioned <i>runtime system</i>. </p><p>Most <a href="/wiki/Programming_language" title="Programming language">programming languages</a> have some form of runtime system that provides an environment in which programs run. This environment may address a number of issues including the <a href="/wiki/Memory_management" title="Memory management">management</a> of application <a href="/wiki/Computer_memory" title="Computer memory">memory</a>, how the program accesses <a href="/wiki/Variable_(computer_science)" title="Variable (computer science)">variables</a>, mechanisms for passing parameters between <a href="/wiki/Subroutine" class="mw-redirect" title="Subroutine">procedures</a>, interfacing with the <a href="/wiki/Operating_system" title="Operating system">operating system</a>, and otherwise. The <a href="/wiki/Compiler" title="Compiler">compiler</a> makes assumptions depending on the specific runtime system to generate correct code. Typically the runtime system will have some responsibility for setting up and managing the <a href="/wiki/Stack_(abstract_data_type)" title="Stack (abstract data type)">stack</a> and <a href="/wiki/Heap_(data_structure)" title="Heap (data structure)">heap</a>, and may include features such as <a href="/wiki/Garbage_collection_(computer_science)" title="Garbage collection (computer science)">garbage collection</a>, <a href="/wiki/Thread_(computing)" title="Thread (computing)">threads</a> or other <a href="/wiki/Dynamic_programming_language" title="Dynamic programming language">dynamic</a> features built into the language.<sup id="cite_ref-Aho_2007_5-0" class="reference"><a href="#cite_note-Aho_2007-5"><span class="cite-bracket">[</span>5<span class="cite-bracket">]</span></a></sup> </p> <div class="mw-heading mw-heading2"><h2 id="Instruction_cycle">Instruction cycle</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Execution_(computing)&action=edit&section=9" title="Edit section: Instruction cycle"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1236090951"><div role="note" class="hatnote navigation-not-searchable">Main article: <a href="/wiki/Instruction_cycle" title="Instruction cycle">Instruction cycle</a></div> <p>The <i>instruction cycle</i> (also known as the <i>fetch–decode–execute cycle</i>, or simply the <i>fetch-execute cycle</i>) is the cycle that the <a href="/wiki/Central_processing_unit" title="Central processing unit">central processing unit</a> (CPU) follows from <a href="/wiki/Booting" title="Booting">boot-up</a> until the computer has shut down in order to process instructions. It is composed of three main stages: the fetch stage, the decode stage, and the execute stage. </p> <figure class="mw-default-size" typeof="mw:File/Thumb"><a href="/wiki/File:Fetch-Decode-Execute_Cycle.png" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/d/de/Fetch-Decode-Execute_Cycle.png/220px-Fetch-Decode-Execute_Cycle.png" decoding="async" width="220" height="362" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/d/de/Fetch-Decode-Execute_Cycle.png/330px-Fetch-Decode-Execute_Cycle.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/d/de/Fetch-Decode-Execute_Cycle.png/440px-Fetch-Decode-Execute_Cycle.png 2x" data-file-width="511" data-file-height="841" /></a><figcaption>This is a simple diagram illustrating the individual stages of the fetch-decode-execute cycle.</figcaption></figure> <p>In simpler CPUs, the instruction cycle is executed sequentially, each instruction being processed before the next one is started. In most modern CPUs, the instruction cycles are instead executed <a href="/wiki/Concurrent_computing" title="Concurrent computing">concurrently</a>, and often in <a href="/wiki/Parallel_computing" title="Parallel computing">parallel</a>, through an <a href="/wiki/Instruction_pipeline" class="mw-redirect" title="Instruction pipeline">instruction pipeline</a>: the next instruction starts being processed before the previous instruction has finished, which is possible because the cycle is broken up into separate steps.<sup id="cite_ref-6" class="reference"><a href="#cite_note-6"><span class="cite-bracket">[</span>6<span class="cite-bracket">]</span></a></sup> </p> <div class="mw-heading mw-heading2"><h2 id="Interpreter">Interpreter</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Execution_(computing)&action=edit&section=10" title="Edit section: Interpreter"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1236090951"><div role="note" class="hatnote navigation-not-searchable">Main article: <a href="/wiki/Interpreter_(computing)" title="Interpreter (computing)">Interpreter (computing)</a></div> <p>A system that executes a program is called an <a href="/wiki/Interpreter_(computing)" title="Interpreter (computing)">interpreter</a> of the program. Loosely speaking, an interpreter directly executes a program. This contrasts with a language <a href="/wiki/Translator_(computing)" title="Translator (computing)">translator</a> that converts a program from one language to another before it is executed. </p> <div class="mw-heading mw-heading2"><h2 id="Virtual_machine">Virtual machine</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Execution_(computing)&action=edit&section=11" title="Edit section: Virtual machine"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1236090951"><div role="note" class="hatnote navigation-not-searchable">Main article: <a href="/wiki/Virtual_machine" title="Virtual machine">Virtual machine</a></div> <p>A <i>virtual machine</i> (<i>VM</i>) is the <a href="/wiki/Virtualization" title="Virtualization">virtualization</a>/<a href="/wiki/Emulator" title="Emulator">emulation</a> of a <a href="/wiki/Computer_system" class="mw-redirect" title="Computer system">computer system</a>. Virtual machines are based on <a href="/wiki/Computer_architecture" title="Computer architecture">computer architectures</a> and provide functionality of a physical computer. Their implementations may involve specialized hardware, software, or a combination. </p><p>Virtual machines differ and are organized by their function, shown here: </p> <ul><li><b><a href="/wiki/System_virtual_machine" title="System virtual machine">System virtual machines</a></b> (also termed <a href="/wiki/Full_virtualization" class="mw-redirect" title="Full virtualization">full virtualization</a> VMs) provide a substitute for a real machine. They provide functionality needed to execute entire <a href="/wiki/Operating_system" title="Operating system">operating systems</a>. A <a href="/wiki/Hypervisor" title="Hypervisor">hypervisor</a> uses <a href="/wiki/Native_code" class="mw-redirect" title="Native code">native execution</a> to share and manage hardware, allowing for multiple environments which are isolated from one another, yet exist on the same physical machine. Modern hypervisors use <a href="/wiki/Hardware-assisted_virtualization" class="mw-redirect" title="Hardware-assisted virtualization">hardware-assisted virtualization</a>, virtualization-specific hardware, primarily from the host CPUs.</li> <li><b>Process virtual machines</b> are designed to execute computer programs in a platform-independent environment.</li></ul> <p>Some virtual machine emulators, such as <a href="/wiki/QEMU" title="QEMU">QEMU</a> and <a href="/wiki/Video_game_console_emulator" title="Video game console emulator">video game console emulators</a>, are designed to also emulate (or "virtually imitate") different system architectures thus allowing execution of software applications and operating systems written for another <a href="/wiki/CPU" class="mw-redirect" title="CPU">CPU</a> or architecture. <a href="/wiki/OS-level_virtualization" title="OS-level virtualization">OS-level virtualization</a> allows the resources of a computer to be partitioned via the <a href="/wiki/Kernel_(operating_system)" title="Kernel (operating system)">kernel</a>. The terms are not universally interchangeable. </p> <div class="mw-heading mw-heading2"><h2 id="See_also">See also</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Execution_(computing)&action=edit&section=12" title="Edit section: See also"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <ul><li><a href="/wiki/Executable" title="Executable">Executable</a></li> <li><a href="/wiki/Run-time_system" class="mw-redirect" title="Run-time system">Run-time system</a></li> <li><a href="/wiki/Run_time_(program_lifecycle_phase)" class="mw-redirect" title="Run time (program lifecycle phase)">Runtime program phase</a></li> <li><a href="/wiki/Program_counter" title="Program counter">Program counter</a></li></ul> <div class="mw-heading mw-heading2"><h2 id="References">References</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Execution_(computing)&action=edit&section=13" title="Edit section: References"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <style data-mw-deduplicate="TemplateStyles:r1239543626">.mw-parser-output .reflist{margin-bottom:0.5em;list-style-type:decimal}@media screen{.mw-parser-output .reflist{font-size:90%}}.mw-parser-output .reflist .references{font-size:100%;margin-bottom:0;list-style-type:inherit}.mw-parser-output .reflist-columns-2{column-width:30em}.mw-parser-output .reflist-columns-3{column-width:25em}.mw-parser-output .reflist-columns{margin-top:0.3em}.mw-parser-output .reflist-columns ol{margin-top:0}.mw-parser-output .reflist-columns li{page-break-inside:avoid;break-inside:avoid-column}.mw-parser-output .reflist-upper-alpha{list-style-type:upper-alpha}.mw-parser-output .reflist-upper-roman{list-style-type:upper-roman}.mw-parser-output .reflist-lower-alpha{list-style-type:lower-alpha}.mw-parser-output .reflist-lower-greek{list-style-type:lower-greek}.mw-parser-output .reflist-lower-roman{list-style-type:lower-roman}</style><div class="reflist"> <div class="mw-references-wrap"><ol class="references"> <li id="cite_note-1"><span class="mw-cite-backlink"><b><a href="#cite_ref-1">^</a></b></span> <span class="reference-text"><style data-mw-deduplicate="TemplateStyles:r1238218222">.mw-parser-output cite.citation{font-style:inherit;word-wrap:break-word}.mw-parser-output .citation q{quotes:"\"""\"""'""'"}.mw-parser-output .citation:target{background-color:rgba(0,127,255,0.133)}.mw-parser-output .id-lock-free.id-lock-free a{background:url("//upload.wikimedia.org/wikipedia/commons/6/65/Lock-green.svg")right 0.1em center/9px no-repeat}.mw-parser-output .id-lock-limited.id-lock-limited a,.mw-parser-output .id-lock-registration.id-lock-registration a{background:url("//upload.wikimedia.org/wikipedia/commons/d/d6/Lock-gray-alt-2.svg")right 0.1em center/9px no-repeat}.mw-parser-output .id-lock-subscription.id-lock-subscription a{background:url("//upload.wikimedia.org/wikipedia/commons/a/aa/Lock-red-alt-2.svg")right 0.1em center/9px no-repeat}.mw-parser-output .cs1-ws-icon a{background:url("//upload.wikimedia.org/wikipedia/commons/4/4c/Wikisource-logo.svg")right 0.1em center/12px no-repeat}body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .id-lock-free a,body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .id-lock-limited a,body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .id-lock-registration a,body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .id-lock-subscription a,body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .cs1-ws-icon a{background-size:contain;padding:0 1em 0 0}.mw-parser-output .cs1-code{color:inherit;background:inherit;border:none;padding:inherit}.mw-parser-output .cs1-hidden-error{display:none;color:var(--color-error,#d33)}.mw-parser-output .cs1-visible-error{color:var(--color-error,#d33)}.mw-parser-output .cs1-maint{display:none;color:#085;margin-left:0.3em}.mw-parser-output .cs1-kern-left{padding-left:0.2em}.mw-parser-output .cs1-kern-right{padding-right:0.2em}.mw-parser-output .citation .mw-selflink{font-weight:inherit}@media screen{.mw-parser-output .cs1-format{font-size:95%}html.skin-theme-clientpref-night .mw-parser-output .cs1-maint{color:#18911f}}@media screen and (prefers-color-scheme:dark){html.skin-theme-clientpref-os .mw-parser-output .cs1-maint{color:#18911f}}</style><cite class="citation web cs1"><a rel="nofollow" class="external text" href="http://www.merriam-webster.com/dictionary/executable">"executable"</a>. <i>Merriam-Webster's Online Dictionary</i>. <a href="/wiki/Merriam-Webster" title="Merriam-Webster">Merriam-Webster</a><span class="reference-accessdate">. Retrieved <span class="nowrap">2008-07-19</span></span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=unknown&rft.jtitle=Merriam-Webster%27s+Online+Dictionary&rft.atitle=executable&rft_id=http%3A%2F%2Fwww.merriam-webster.com%2Fdictionary%2Fexecutable&rfr_id=info%3Asid%2Fen.wikipedia.org%3AExecution+%28computing%29" class="Z3988"></span></span> </li> <li id="cite_note-2"><span class="mw-cite-backlink"><b><a href="#cite_ref-2">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://www.geeksforgeeks.org/machine-instructions/">"Machine Instructions"</a>. <i>GeeksforGeeks</i>. 2015-11-03<span class="reference-accessdate">. Retrieved <span class="nowrap">2019-09-18</span></span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=unknown&rft.jtitle=GeeksforGeeks&rft.atitle=Machine+Instructions&rft.date=2015-11-03&rft_id=https%3A%2F%2Fwww.geeksforgeeks.org%2Fmachine-instructions%2F&rfr_id=info%3Asid%2Fen.wikipedia.org%3AExecution+%28computing%29" class="Z3988"></span></span> </li> <li id="cite_note-:0-3"><span class="mw-cite-backlink">^ <a href="#cite_ref-:0_3-0"><sup><i><b>a</b></i></sup></a> <a href="#cite_ref-:0_3-1"><sup><i><b>b</b></i></sup></a></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite id="CITEREFBovet2005" class="citation book cs1">Bovet, Daniel P. (2005). <a rel="nofollow" class="external text" href="https://www.worldcat.org/oclc/64549743"><i>Understanding the Linux Kernel</i></a>. Marco Cesati (3 ed.). Sevastopol, CA: O'Reilly. <a href="/wiki/ISBN_(identifier)" class="mw-redirect" title="ISBN (identifier)">ISBN</a> <a href="/wiki/Special:BookSources/0-596-00565-2" title="Special:BookSources/0-596-00565-2"><bdi>0-596-00565-2</bdi></a>. <a href="/wiki/OCLC_(identifier)" class="mw-redirect" title="OCLC (identifier)">OCLC</a> <a rel="nofollow" class="external text" href="https://search.worldcat.org/oclc/64549743">64549743</a>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=book&rft.btitle=Understanding+the+Linux+Kernel&rft.place=Sevastopol%2C+CA&rft.edition=3&rft.pub=O%27Reilly&rft.date=2005&rft_id=info%3Aoclcnum%2F64549743&rft.isbn=0-596-00565-2&rft.aulast=Bovet&rft.aufirst=Daniel+P.&rft_id=https%3A%2F%2Fwww.worldcat.org%2Foclc%2F64549743&rfr_id=info%3Asid%2Fen.wikipedia.org%3AExecution+%28computing%29" class="Z3988"></span></span> </li> <li id="cite_note-4"><span class="mw-cite-backlink"><b><a href="#cite_ref-4">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://www.geeksforgeeks.org/difference-between-swapping-and-context-switching/">"Difference between Swapping and Context Switching"</a>. <i>GeeksforGeeks</i>. 2021-06-10<span class="reference-accessdate">. Retrieved <span class="nowrap">2022-08-10</span></span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=unknown&rft.jtitle=GeeksforGeeks&rft.atitle=Difference+between+Swapping+and+Context+Switching&rft.date=2021-06-10&rft_id=https%3A%2F%2Fwww.geeksforgeeks.org%2Fdifference-between-swapping-and-context-switching%2F&rfr_id=info%3Asid%2Fen.wikipedia.org%3AExecution+%28computing%29" class="Z3988"></span></span> </li> <li id="cite_note-Aho_2007-5"><span class="mw-cite-backlink"><b><a href="#cite_ref-Aho_2007_5-0">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite id="CITEREFAhoLamSethiUllman2007" class="citation book cs1"><a href="/wiki/Alfred_V._Aho" class="mw-redirect" title="Alfred V. Aho">Aho, Alfred V.</a>; <a href="/wiki/Monica_Sin-Ling_Lam" class="mw-redirect" title="Monica Sin-Ling Lam">Lam, Monica Sin-Ling</a>; <a href="/wiki/Ravi_Sethi" title="Ravi Sethi">Sethi, Ravi</a>; <a href="/wiki/Jeffrey_David_Ullman" class="mw-redirect" title="Jeffrey David Ullman">Ullman, Jeffrey David</a> (2007). <span class="id-lock-registration" title="Free registration required"><a rel="nofollow" class="external text" href="https://archive.org/details/compilers00alfr_0/page/427"><i>Compilers: Principles, Techniques and Tools</i></a></span> (2nd ed.). Boston, MA, US: <a href="/wiki/Pearson_Education" title="Pearson Education">Pearson Education</a>. p. <a rel="nofollow" class="external text" href="https://archive.org/details/compilers00alfr_0/page/427">427</a>. <a href="/wiki/ISBN_(identifier)" class="mw-redirect" title="ISBN (identifier)">ISBN</a> <a href="/wiki/Special:BookSources/978-0-321-48681-3" title="Special:BookSources/978-0-321-48681-3"><bdi>978-0-321-48681-3</bdi></a>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=book&rft.btitle=Compilers%3A+Principles%2C+Techniques+and+Tools&rft.place=Boston%2C+MA%2C+US&rft.pages=427&rft.edition=2nd&rft.pub=Pearson+Education&rft.date=2007&rft.isbn=978-0-321-48681-3&rft.aulast=Aho&rft.aufirst=Alfred+V.&rft.au=Lam%2C+Monica+Sin-Ling&rft.au=Sethi%2C+Ravi&rft.au=Ullman%2C+Jeffrey+David&rft_id=https%3A%2F%2Farchive.org%2Fdetails%2Fcompilers00alfr_0%2Fpage%2F427&rfr_id=info%3Asid%2Fen.wikipedia.org%3AExecution+%28computing%29" class="Z3988"></span></span> </li> <li id="cite_note-6"><span class="mw-cite-backlink"><b><a href="#cite_ref-6">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite id="CITEREFCrystal_Chen,_Greg_Novick_and_Kirk_Shimano2000" class="citation web cs1">Crystal Chen, Greg Novick and Kirk Shimano (2000). <a rel="nofollow" class="external text" href="https://cs.stanford.edu/people/eroberts/courses/soco/projects/risc/pipelining/index.html">"Pipelining"</a><span class="reference-accessdate">. Retrieved <span class="nowrap">2019-06-26</span></span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=unknown&rft.btitle=Pipelining&rft.date=2000&rft.au=Crystal+Chen%2C+Greg+Novick+and+Kirk+Shimano&rft_id=https%3A%2F%2Fcs.stanford.edu%2Fpeople%2Feroberts%2Fcourses%2Fsoco%2Fprojects%2Frisc%2Fpipelining%2Findex.html&rfr_id=info%3Asid%2Fen.wikipedia.org%3AExecution+%28computing%29" class="Z3988"></span></span> </li> </ol></div></div> <div class="navbox-styles"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1129693374"><style data-mw-deduplicate="TemplateStyles:r1236075235">.mw-parser-output .navbox{box-sizing:border-box;border:1px solid #a2a9b1;width:100%;clear:both;font-size:88%;text-align:center;padding:1px;margin:1em auto 0}.mw-parser-output .navbox .navbox{margin-top:0}.mw-parser-output .navbox+.navbox,.mw-parser-output .navbox+.navbox-styles+.navbox{margin-top:-1px}.mw-parser-output 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.navbox-subgroup .navbox-abovebelow{background-color:#e6e6ff}.mw-parser-output .navbox-even{background-color:#f7f7f7}.mw-parser-output .navbox-odd{background-color:transparent}.mw-parser-output .navbox .hlist td dl,.mw-parser-output .navbox .hlist td ol,.mw-parser-output .navbox .hlist td ul,.mw-parser-output .navbox td.hlist dl,.mw-parser-output .navbox td.hlist ol,.mw-parser-output .navbox td.hlist ul{padding:0.125em 0}.mw-parser-output .navbox .navbar{display:block;font-size:100%}.mw-parser-output .navbox-title .navbar{float:left;text-align:left;margin-right:0.5em}body.skin--responsive .mw-parser-output .navbox-image img{max-width:none!important}@media print{body.ns-0 .mw-parser-output .navbox{display:none!important}}</style></div><div role="navigation" class="navbox" aria-labelledby="Processor_technologies" style="padding:3px"><table class="nowraplinks mw-collapsible autocollapse navbox-inner" style="border-spacing:0;background:transparent;color:inherit"><tbody><tr><th scope="col" class="navbox-title" colspan="2"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1129693374"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1239400231"><div class="navbar plainlinks hlist navbar-mini"><ul><li class="nv-view"><a href="/wiki/Template:Processor_technologies" title="Template:Processor technologies"><abbr title="View this template">v</abbr></a></li><li class="nv-talk"><a href="/wiki/Template_talk:Processor_technologies" title="Template talk:Processor technologies"><abbr title="Discuss this template">t</abbr></a></li><li class="nv-edit"><a href="/wiki/Special:EditPage/Template:Processor_technologies" title="Special:EditPage/Template:Processor technologies"><abbr title="Edit this template">e</abbr></a></li></ul></div><div id="Processor_technologies" style="font-size:114%;margin:0 4em"><a href="/wiki/Processor_(computing)" title="Processor (computing)">Processor technologies</a></div></th></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Model_of_computation" title="Model of computation">Models</a></th><td class="navbox-list-with-group navbox-list navbox-odd hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Abstract_machine" title="Abstract machine">Abstract machine</a></li> <li><a href="/wiki/Stored-program_computer" title="Stored-program computer">Stored-program computer</a></li> <li><a href="/wiki/Finite-state_machine" title="Finite-state machine">Finite-state machine</a> <ul><li><a href="/wiki/Finite-state_machine_with_datapath" class="mw-redirect" title="Finite-state machine with datapath">with datapath</a></li> <li><a href="/wiki/Hierarchical_state_machine" class="mw-redirect" title="Hierarchical state machine">Hierarchical</a></li> <li><a href="/wiki/Deterministic_finite_automaton" title="Deterministic finite automaton">Deterministic finite automaton</a></li> <li><a href="/wiki/Queue_automaton" title="Queue automaton">Queue automaton</a></li> <li><a href="/wiki/Cellular_automaton" title="Cellular automaton">Cellular automaton</a></li> <li><a href="/wiki/Quantum_cellular_automaton" title="Quantum cellular automaton">Quantum cellular automaton</a></li></ul></li> <li><a href="/wiki/Turing_machine" title="Turing machine">Turing machine</a> <ul><li><a href="/wiki/Alternating_Turing_machine" title="Alternating Turing machine">Alternating Turing machine</a></li> <li><a href="/wiki/Universal_Turing_machine" title="Universal Turing machine">Universal</a></li> <li><a href="/wiki/Post%E2%80%93Turing_machine" title="Post–Turing machine">Post–Turing</a></li> <li><a href="/wiki/Quantum_Turing_machine" title="Quantum Turing machine">Quantum</a></li> <li><a href="/wiki/Nondeterministic_Turing_machine" title="Nondeterministic Turing machine">Nondeterministic Turing machine</a></li> <li><a href="/wiki/Probabilistic_Turing_machine" title="Probabilistic Turing machine">Probabilistic Turing machine</a></li> <li><a href="/wiki/Hypercomputation" title="Hypercomputation">Hypercomputation</a></li> <li><a href="/wiki/Zeno_machine" title="Zeno machine">Zeno machine</a></li></ul></li> <li><a href="/wiki/History_of_general-purpose_CPUs#Belt_machine_architecture" title="History of general-purpose CPUs">Belt machine</a></li> <li><a href="/wiki/Stack_machine" title="Stack machine">Stack machine</a></li> <li><a href="/wiki/Register_machine" title="Register machine">Register machines</a> <ul><li><a href="/wiki/Counter_machine" title="Counter machine">Counter</a></li> <li><a href="/wiki/Pointer_machine" title="Pointer machine">Pointer</a></li> <li><a href="/wiki/Random-access_machine" title="Random-access machine">Random-access</a></li> <li><a href="/wiki/Random-access_stored-program_machine" title="Random-access stored-program machine">Random-access stored program</a></li></ul></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Computer_architecture" title="Computer architecture">Architecture</a></th><td class="navbox-list-with-group navbox-list navbox-even hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Microarchitecture" title="Microarchitecture">Microarchitecture</a></li> <li><a href="/wiki/Von_Neumann_architecture" title="Von Neumann architecture">Von Neumann</a></li> <li><a href="/wiki/Harvard_architecture" title="Harvard architecture">Harvard</a> <ul><li><a href="/wiki/Modified_Harvard_architecture" title="Modified Harvard architecture">modified</a></li></ul></li> <li><a href="/wiki/Dataflow_architecture" title="Dataflow architecture">Dataflow</a></li> <li><a href="/wiki/Transport_triggered_architecture" title="Transport triggered architecture">Transport-triggered</a></li> <li><a href="/wiki/Cellular_architecture" title="Cellular architecture">Cellular</a></li> <li><a href="/wiki/Endianness" title="Endianness">Endianness</a></li> <li><a href="/wiki/Computer_data_storage" title="Computer data storage">Memory access</a> <ul><li><a href="/wiki/Non-uniform_memory_access" title="Non-uniform memory access">NUMA</a></li> <li><a href="/wiki/Uniform_memory_access" title="Uniform memory access">HUMA</a></li> <li><a href="/wiki/Load%E2%80%93store_architecture" title="Load–store architecture">Load–store</a></li> <li><a href="/wiki/Register%E2%80%93memory_architecture" title="Register–memory architecture">Register/memory</a></li></ul></li> <li><a href="/wiki/Cache_hierarchy" title="Cache hierarchy">Cache hierarchy</a></li> <li><a href="/wiki/Memory_hierarchy" title="Memory hierarchy">Memory hierarchy</a> <ul><li><a href="/wiki/Virtual_memory" title="Virtual memory">Virtual memory</a></li> <li><a href="/wiki/Secondary_storage" class="mw-redirect" title="Secondary storage">Secondary storage</a></li></ul></li> <li><a href="/wiki/Heterogeneous_System_Architecture" title="Heterogeneous System Architecture">Heterogeneous</a></li> <li><a href="/wiki/Fabric_computing" title="Fabric computing">Fabric</a></li> <li><a href="/wiki/Multiprocessing" title="Multiprocessing">Multiprocessing</a></li> <li><a href="/wiki/Cognitive_computing" title="Cognitive computing">Cognitive</a></li> <li><a href="/wiki/Neuromorphic_engineering" class="mw-redirect" title="Neuromorphic engineering">Neuromorphic</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Instruction_set_architecture" title="Instruction set architecture">Instruction set<br />architectures</a></th><td class="navbox-list-with-group navbox-list navbox-odd hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"></div><table class="nowraplinks navbox-subgroup" style="border-spacing:0"><tbody><tr><th scope="row" class="navbox-group" style="width:1%">Types</th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Orthogonal_instruction_set" title="Orthogonal instruction set">Orthogonal instruction set</a></li> <li><a href="/wiki/Complex_instruction_set_computer" title="Complex instruction set computer">CISC</a></li> <li><a href="/wiki/Reduced_instruction_set_computer" title="Reduced instruction set computer">RISC</a></li> <li><a href="/wiki/Application-specific_instruction_set_processor" title="Application-specific instruction set processor">Application-specific</a></li> <li><a href="/wiki/Explicit_data_graph_execution" title="Explicit data graph execution">EDGE</a> <ul><li><a href="/wiki/TRIPS_architecture" title="TRIPS architecture">TRIPS</a></li></ul></li> <li><a href="/wiki/Very_long_instruction_word" title="Very long instruction word">VLIW</a> <ul><li><a href="/wiki/Explicitly_parallel_instruction_computing" title="Explicitly parallel instruction computing">EPIC</a></li></ul></li> <li><a href="/wiki/Minimal_instruction_set_computer" title="Minimal instruction set computer">MISC</a></li> <li><a href="/wiki/One-instruction_set_computer" title="One-instruction set computer">OISC</a></li> <li><a href="/wiki/No_instruction_set_computing" title="No instruction set computing">NISC</a></li> <li><a href="/wiki/Zero_instruction_set_computer" class="mw-redirect" title="Zero instruction set computer">ZISC</a></li> <li><a href="/wiki/VISC_architecture" title="VISC architecture">VISC architecture</a></li> <li><a href="/wiki/Quantum_computing" title="Quantum computing">Quantum computing</a></li> <li><a href="/wiki/Comparison_of_instruction_set_architectures" title="Comparison of instruction set architectures">Comparison</a> <ul><li><a href="/wiki/Addressing_mode" title="Addressing mode">Addressing modes</a></li></ul></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Instruction<br />sets</th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Motorola_68000_series" title="Motorola 68000 series">Motorola 68000 series</a></li> <li><a href="/wiki/VAX" title="VAX">VAX</a></li> <li><a href="/wiki/PDP-11_architecture" title="PDP-11 architecture">PDP-11</a></li> <li><a href="/wiki/X86" title="X86">x86</a></li> <li><a href="/wiki/ARM_architecture_family" title="ARM architecture family">ARM</a></li> <li><a href="/wiki/Stanford_MIPS" title="Stanford MIPS">Stanford MIPS</a></li> <li><a href="/wiki/MIPS_architecture" title="MIPS architecture">MIPS</a></li> <li><a href="/wiki/MIPS-X" title="MIPS-X">MIPS-X</a></li> <li>Power <ul><li><a href="/wiki/IBM_POWER_architecture" title="IBM POWER architecture">POWER</a></li> <li><a href="/wiki/PowerPC" title="PowerPC">PowerPC</a></li> <li><a href="/wiki/Power_ISA" title="Power ISA">Power ISA</a></li></ul></li> <li><a href="/wiki/Clipper_architecture" title="Clipper architecture">Clipper architecture</a></li> <li><a href="/wiki/SPARC" title="SPARC">SPARC</a></li> <li><a href="/wiki/SuperH" title="SuperH">SuperH</a></li> <li><a href="/wiki/DEC_Alpha" title="DEC Alpha">DEC Alpha</a></li> <li><a href="/wiki/ETRAX_CRIS" title="ETRAX CRIS">ETRAX CRIS</a></li> <li><a href="/wiki/M32R" title="M32R">M32R</a></li> <li><a href="/wiki/Unicore" title="Unicore">Unicore</a></li> <li><a href="/wiki/IA-64" title="IA-64">Itanium</a></li> <li><a href="/wiki/OpenRISC" title="OpenRISC">OpenRISC</a></li> <li><a href="/wiki/RISC-V" title="RISC-V">RISC-V</a></li> <li><a href="/wiki/MicroBlaze" title="MicroBlaze">MicroBlaze</a></li> <li><a href="/wiki/Little_man_computer" title="Little man computer">LMC</a></li> <li>System/3x0 <ul><li><a href="/wiki/IBM_System/360_architecture" title="IBM System/360 architecture">S/360</a></li> <li><a href="/wiki/IBM_System/370" title="IBM System/370">S/370</a></li> <li><a href="/wiki/IBM_System/390" title="IBM System/390">S/390</a></li> <li><a href="/wiki/Z/Architecture" title="Z/Architecture">z/Architecture</a></li></ul></li> <li>Tilera ISA</li> <li><a href="/wiki/VISC_architecture" title="VISC architecture">VISC architecture</a></li> <li><a href="/wiki/Adapteva#Products" class="mw-redirect" title="Adapteva">Epiphany architecture</a></li> <li><a href="/wiki/Comparison_of_instruction_set_architectures" title="Comparison of instruction set architectures">Others</a></li></ul> </div></td></tr></tbody></table><div></div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Instruction_cycle" title="Instruction cycle">Execution</a></th><td class="navbox-list-with-group navbox-list navbox-odd hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"></div><table class="nowraplinks navbox-subgroup" style="border-spacing:0"><tbody><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Instruction_pipelining" title="Instruction pipelining">Instruction pipelining</a></th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Pipeline_stall" title="Pipeline stall">Pipeline stall</a></li> <li><a href="/wiki/Operand_forwarding" title="Operand forwarding">Operand forwarding</a></li> <li><a href="/wiki/Classic_RISC_pipeline" title="Classic RISC pipeline">Classic RISC pipeline</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Hazard_(computer_architecture)" title="Hazard (computer architecture)">Hazards</a></th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Data_dependency" title="Data dependency">Data dependency</a></li> <li><a href="/wiki/Structural_hazard" class="mw-redirect" title="Structural hazard">Structural</a></li> <li><a href="/wiki/Control_hazard" class="mw-redirect" title="Control hazard">Control</a></li> <li><a href="/wiki/False_sharing" title="False sharing">False sharing</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Out-of-order_execution" title="Out-of-order execution">Out-of-order</a></th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Scoreboarding" title="Scoreboarding">Scoreboarding</a></li> <li><a href="/wiki/Tomasulo%27s_algorithm" title="Tomasulo's algorithm">Tomasulo's algorithm</a> <ul><li><a href="/wiki/Reservation_station" title="Reservation station">Reservation station</a></li> <li><a href="/wiki/Re-order_buffer" title="Re-order buffer">Re-order buffer</a></li></ul></li> <li><a href="/wiki/Register_renaming" title="Register renaming">Register renaming</a></li> <li><a href="/wiki/Wide-issue" title="Wide-issue">Wide-issue</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Speculative_execution" title="Speculative execution">Speculative</a></th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Branch_predictor" title="Branch predictor">Branch prediction</a></li> <li><a href="/wiki/Memory_dependence_prediction" title="Memory dependence prediction">Memory dependence prediction</a></li></ul> </div></td></tr></tbody></table><div></div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Parallel_computing" title="Parallel computing">Parallelism</a></th><td class="navbox-list-with-group navbox-list navbox-odd hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"></div><table class="nowraplinks navbox-subgroup" style="border-spacing:0"><tbody><tr><th scope="row" class="navbox-group" style="width:1%">Level</th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Bit-level_parallelism" title="Bit-level parallelism">Bit</a> <ul><li><a href="/wiki/Bit-serial_architecture" title="Bit-serial architecture">Bit-serial</a></li> <li><a href="/wiki/Word_(computer_architecture)" title="Word (computer architecture)">Word</a></li></ul></li> <li><a href="/wiki/Instruction-level_parallelism" title="Instruction-level parallelism">Instruction</a></li> <li><a href="/wiki/Instruction_pipelining" title="Instruction pipelining">Pipelining</a> <ul><li><a href="/wiki/Scalar_processor" title="Scalar processor">Scalar</a></li> <li><a href="/wiki/Superscalar_processor" title="Superscalar processor">Superscalar</a></li></ul></li> <li><a href="/wiki/Task_parallelism" title="Task parallelism">Task</a> <ul><li><a href="/wiki/Thread_(computing)" title="Thread (computing)">Thread</a></li> <li><a href="/wiki/Process_(computing)" title="Process (computing)">Process</a></li></ul></li> <li><a href="/wiki/Data_parallelism" title="Data parallelism">Data</a> <ul><li><a href="/wiki/Vector_processor" title="Vector processor">Vector</a></li></ul></li> <li><a href="/wiki/Memory-level_parallelism" title="Memory-level parallelism">Memory</a></li> <li><a href="/wiki/Distributed_architecture" class="mw-redirect" title="Distributed architecture">Distributed</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Multithreading_(computer_architecture)" title="Multithreading (computer architecture)">Multithreading</a></th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Temporal_multithreading" title="Temporal multithreading">Temporal</a></li> <li><a href="/wiki/Simultaneous_multithreading" title="Simultaneous multithreading">Simultaneous</a> <ul><li><a href="/wiki/Hyper-threading" title="Hyper-threading">Hyperthreading</a></li> <li><a href="/wiki/Simultaneous_and_heterogeneous_multithreading" title="Simultaneous and heterogeneous multithreading">Simultaneous and heterogenous</a></li></ul></li> <li><a href="/wiki/Speculative_multithreading" title="Speculative multithreading">Speculative</a></li> <li><a href="/wiki/Preemption_(computing)" title="Preemption (computing)">Preemptive</a></li> <li><a href="/wiki/Cooperative_multitasking" title="Cooperative multitasking">Cooperative</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Flynn%27s_taxonomy" title="Flynn's taxonomy">Flynn's taxonomy</a></th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Single_instruction,_single_data" title="Single instruction, single data">SISD</a></li> <li><a href="/wiki/Single_instruction,_multiple_data" title="Single instruction, multiple data">SIMD</a> <ul><li><a href="/wiki/Single_instruction,_multiple_threads" title="Single instruction, multiple threads">Array processing (SIMT)</a></li> <li><a href="/wiki/Flynn%27s_taxonomy#Pipelined_processor" title="Flynn's taxonomy">Pipelined processing</a></li> <li><a href="/wiki/Flynn%27s_taxonomy#Associative_processor" title="Flynn's taxonomy">Associative processing</a></li> <li><a href="/wiki/SWAR" title="SWAR">SWAR</a></li></ul></li> <li><a href="/wiki/Multiple_instruction,_single_data" title="Multiple instruction, single data">MISD</a></li> <li><a href="/wiki/Multiple_instruction,_multiple_data" title="Multiple instruction, multiple data">MIMD</a> <ul><li><a href="/wiki/Single_program,_multiple_data" title="Single program, multiple data">SPMD</a></li></ul></li></ul> </div></td></tr></tbody></table><div></div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Computer_performance" title="Computer performance">Processor<br />performance</a></th><td class="navbox-list-with-group navbox-list navbox-even hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Transistor_count" title="Transistor count">Transistor count</a></li> <li><a href="/wiki/Instructions_per_cycle" title="Instructions per cycle">Instructions per cycle</a> (IPC) <ul><li><a href="/wiki/Cycles_per_instruction" title="Cycles per instruction">Cycles per instruction</a> (CPI)</li></ul></li> <li><a href="/wiki/Instructions_per_second" title="Instructions per second">Instructions per second</a> (IPS)</li> <li><a href="/wiki/FLOPS" class="mw-redirect" title="FLOPS">Floating-point operations per second</a> (FLOPS)</li> <li><a href="/wiki/Transactions_per_second" title="Transactions per second">Transactions per second</a> (TPS)</li> <li><a href="/wiki/SUPS" title="SUPS">Synaptic updates per second</a> (SUPS)</li> <li><a href="/wiki/Performance_per_watt" title="Performance per watt">Performance per watt</a> (PPW)</li> <li><a href="/wiki/Cache_performance_measurement_and_metric" title="Cache performance measurement and metric">Cache performance metrics</a></li> <li><a href="/wiki/Computer_performance_by_orders_of_magnitude" title="Computer performance by orders of magnitude">Computer performance by orders of magnitude</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Processor_(computing)" title="Processor (computing)">Types</a></th><td class="navbox-list-with-group navbox-list navbox-odd hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Central_processing_unit" title="Central processing unit">Central processing unit</a> (CPU)</li> <li><a href="/wiki/Graphics_processing_unit" title="Graphics processing unit">Graphics processing unit</a> (GPU) <ul><li><a href="/wiki/General-purpose_computing_on_graphics_processing_units" title="General-purpose computing on graphics processing units">GPGPU</a></li></ul></li> <li><a href="/wiki/Vector_processor" title="Vector processor">Vector</a></li> <li><a href="/wiki/Barrel_processor" title="Barrel processor">Barrel</a></li> <li><a href="/wiki/Stream_processing" title="Stream processing">Stream</a></li> <li><a href="/wiki/Tile_processor" title="Tile processor">Tile processor</a></li> <li><a href="/wiki/Coprocessor" title="Coprocessor">Coprocessor</a></li> <li><a href="/wiki/Programmable_Array_Logic" title="Programmable Array Logic">PAL</a></li> <li><a href="/wiki/Application-specific_integrated_circuit" title="Application-specific integrated circuit">ASIC</a></li> <li><a href="/wiki/Field-programmable_gate_array" title="Field-programmable gate array">FPGA</a></li> <li><a href="/wiki/Field-programmable_object_array" title="Field-programmable object array">FPOA</a></li> <li><a href="/wiki/Complex_programmable_logic_device" title="Complex programmable logic device">CPLD</a></li> <li><a href="/wiki/Multi-chip_module" title="Multi-chip module">Multi-chip module</a> (MCM)</li> <li><a href="/wiki/System_in_a_package" title="System in a package">System in a package</a> (SiP)</li> <li><a href="/wiki/Package_on_a_package" title="Package on a package">Package on a package</a> (PoP)</li></ul> </div><table class="nowraplinks navbox-subgroup" style="border-spacing:0"><tbody><tr><th scope="row" class="navbox-group" style="width:1%">By application</th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Embedded_system" title="Embedded system">Embedded system</a></li> <li><a href="/wiki/Microprocessor" title="Microprocessor">Microprocessor</a></li> <li><a href="/wiki/Microcontroller" title="Microcontroller">Microcontroller</a></li> <li><a href="/wiki/Mobile_processor" title="Mobile processor">Mobile</a></li> <li><a href="/wiki/Ultra-low-voltage_processor" title="Ultra-low-voltage processor">Ultra-low-voltage</a></li> <li><a href="/wiki/Application-specific_instruction_set_processor" title="Application-specific instruction set processor">ASIP</a></li> <li><a href="/wiki/Soft_microprocessor" title="Soft microprocessor">Soft microprocessor</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Systems<br />on chip</th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/System_on_a_chip" title="System on a chip">System on a chip</a> (SoC)</li> <li><a href="/wiki/Multiprocessor_system_on_a_chip" class="mw-redirect" title="Multiprocessor system on a chip">Multiprocessor</a> (MPSoC)</li> <li><a href="/wiki/Cypress_PSoC" title="Cypress PSoC">Cypress PSoC</a></li> <li><a href="/wiki/Network_on_a_chip" title="Network on a chip">Network on a chip</a> (NoC)</li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Hardware_acceleration" title="Hardware acceleration">Hardware<br />accelerators</a></th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Coprocessor" title="Coprocessor">Coprocessor</a></li> <li><a href="/wiki/AI_accelerator" title="AI accelerator">AI accelerator</a></li> <li><a href="/wiki/Graphics_processing_unit" title="Graphics processing unit">Graphics processing unit</a> (GPU)</li> <li><a href="/wiki/Image_processor" title="Image processor">Image processor</a></li> <li><a href="/wiki/Vision_processing_unit" title="Vision processing unit">Vision processing unit</a> (VPU)</li> <li><a href="/wiki/Physics_processing_unit" title="Physics processing unit">Physics processing unit</a> (PPU)</li> <li><a href="/wiki/Digital_signal_processor" title="Digital signal processor">Digital signal processor</a> (DSP)</li> <li><a href="/wiki/Tensor_Processing_Unit" title="Tensor Processing Unit">Tensor Processing Unit</a> (TPU)</li> <li><a href="/wiki/Secure_cryptoprocessor" title="Secure cryptoprocessor">Secure cryptoprocessor</a></li> <li><a href="/wiki/Network_processor" title="Network processor">Network processor</a></li> <li><a href="/wiki/Baseband_processor" title="Baseband processor">Baseband processor</a></li></ul> </div></td></tr></tbody></table><div> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Word_(computer_architecture)" title="Word (computer architecture)">Word size</a></th><td class="navbox-list-with-group navbox-list navbox-odd hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/1-bit_computing" title="1-bit computing">1-bit</a></li> <li><a href="/wiki/4-bit_computing" title="4-bit computing">4-bit</a></li> <li><a href="/wiki/8-bit_computing" title="8-bit computing">8-bit</a></li> <li><a href="/wiki/12-bit_computing" title="12-bit computing">12-bit</a></li> <li><a href="/wiki/Apollo_Guidance_Computer" title="Apollo Guidance Computer">15-bit</a></li> <li><a href="/wiki/16-bit_computing" title="16-bit computing">16-bit</a></li> <li><a href="/wiki/24-bit_computing" title="24-bit computing">24-bit</a></li> <li><a href="/wiki/32-bit_computing" title="32-bit computing">32-bit</a></li> <li><a href="/wiki/48-bit_computing" title="48-bit computing">48-bit</a></li> <li><a href="/wiki/64-bit_computing" title="64-bit computing">64-bit</a></li> <li><a href="/wiki/128-bit_computing" title="128-bit computing">128-bit</a></li> <li><a href="/wiki/256-bit_computing" title="256-bit computing">256-bit</a></li> <li><a href="/wiki/512-bit_computing" title="512-bit computing">512-bit</a></li> <li><a href="/wiki/Bit_slicing" title="Bit slicing">bit slicing</a></li> <li><a href="/wiki/Word_(computer_architecture)#Table_of_word_sizes" title="Word (computer architecture)">others</a> <ul><li><a href="/wiki/Word_(computer_architecture)#Variable-word_architectures" title="Word (computer architecture)">variable</a></li></ul></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Core count</th><td class="navbox-list-with-group navbox-list navbox-even hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Single-core" title="Single-core">Single-core</a></li> <li><a href="/wiki/Multi-core_processor" title="Multi-core processor">Multi-core</a></li> <li><a href="/wiki/Manycore_processor" title="Manycore processor">Manycore</a></li> <li><a href="/wiki/Heterogeneous_computing" title="Heterogeneous computing">Heterogeneous architecture</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Components</th><td class="navbox-list-with-group navbox-list navbox-odd hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Central_processing_unit" title="Central processing unit">Core</a></li> <li><a href="/wiki/Cache_(computing)" title="Cache (computing)">Cache</a> <ul><li><a href="/wiki/CPU_cache" title="CPU cache">CPU cache</a></li> <li><a href="/wiki/Scratchpad_memory" title="Scratchpad memory">Scratchpad memory</a></li> <li><a href="/wiki/Data_cache" class="mw-redirect" title="Data cache">Data cache</a></li> <li><a href="/wiki/Instruction_cache" class="mw-redirect" title="Instruction cache">Instruction cache</a></li> <li><a href="/wiki/Cache_replacement_policies" title="Cache replacement policies">replacement policies</a></li> <li><a href="/wiki/Cache_coherence" title="Cache coherence">coherence</a></li></ul></li> <li><a href="/wiki/Bus_(computing)" title="Bus (computing)">Bus</a></li> <li><a href="/wiki/Clock_rate" title="Clock rate">Clock rate</a></li> <li><a href="/wiki/Clock_signal" title="Clock signal">Clock signal</a></li> <li><a href="/wiki/FIFO_(computing_and_electronics)" title="FIFO (computing and electronics)">FIFO</a></li></ul> </div><table class="nowraplinks navbox-subgroup" style="border-spacing:0"><tbody><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Execution_unit" title="Execution unit">Functional<br />units</a></th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Arithmetic_logic_unit" title="Arithmetic logic unit">Arithmetic logic unit</a> (ALU)</li> <li><a href="/wiki/Address_generation_unit" title="Address generation unit">Address generation unit</a> (AGU)</li> <li><a href="/wiki/Floating-point_unit" title="Floating-point unit">Floating-point unit</a> (FPU)</li> <li><a href="/wiki/Memory_management_unit" title="Memory management unit">Memory management unit</a> (MMU) <ul><li><a href="/wiki/Load%E2%80%93store_unit" title="Load–store unit">Load–store unit</a></li> <li><a href="/wiki/Translation_lookaside_buffer" title="Translation lookaside buffer">Translation lookaside buffer</a> (TLB)</li></ul></li> <li><a href="/wiki/Branch_predictor" title="Branch predictor">Branch predictor</a></li> <li><a href="/wiki/Branch_target_predictor" title="Branch target predictor">Branch target predictor</a></li> <li><a href="/wiki/Memory_controller" title="Memory controller">Integrated memory controller</a> (IMC) <ul><li><a href="/wiki/Memory_management_unit" title="Memory management unit">Memory management unit</a></li></ul></li> <li><a href="/wiki/Instruction_decoder" class="mw-redirect" title="Instruction decoder">Instruction decoder</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Logic_gate" title="Logic gate">Logic</a></th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Combinational_logic" title="Combinational logic">Combinational</a></li> <li><a href="/wiki/Sequential_logic" title="Sequential logic">Sequential</a></li> <li><a href="/wiki/Glue_logic" title="Glue logic">Glue</a></li> <li><a href="/wiki/Logic_gate" title="Logic gate">Logic gate</a> <ul><li><a href="/wiki/Quantum_logic_gate" title="Quantum logic gate">Quantum</a></li> <li><a href="/wiki/Gate_array" title="Gate array">Array</a></li></ul></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Hardware_register" title="Hardware register">Registers</a></th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Processor_register" title="Processor register">Processor register</a></li> <li><a href="/wiki/Status_register" title="Status register">Status register</a></li> <li><a href="/wiki/Stack_register" title="Stack register">Stack register</a></li> <li><a href="/wiki/Register_file" title="Register file">Register file</a></li> <li><a href="/wiki/Memory_buffer_register" title="Memory buffer register">Memory buffer</a></li> <li><a href="/wiki/Memory_address_register" title="Memory address register">Memory address register</a></li> <li><a href="/wiki/Program_counter" title="Program counter">Program counter</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Control_unit" title="Control unit">Control unit</a></th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Hardwired_control_unit" class="mw-redirect" title="Hardwired control unit">Hardwired control unit</a></li> <li><a href="/wiki/Instruction_unit" title="Instruction unit">Instruction unit</a></li> <li><a href="/wiki/Data_buffer" title="Data buffer">Data buffer</a></li> <li><a href="/wiki/Write_buffer" title="Write buffer">Write buffer</a></li> <li><a href="/wiki/Microcode" title="Microcode">Microcode</a> <a href="/wiki/ROM_image" title="ROM image">ROM</a></li> <li><a href="/wiki/Counter_(digital)" title="Counter (digital)">Counter</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Datapath" title="Datapath">Datapath</a></th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Multiplexer" title="Multiplexer">Multiplexer</a></li> <li><a href="/wiki/Demultiplexer" class="mw-redirect" title="Demultiplexer">Demultiplexer</a></li> <li><a href="/wiki/Adder_(electronics)" title="Adder (electronics)">Adder</a></li> <li><a href="/wiki/Binary_multiplier" title="Binary multiplier">Multiplier</a> <ul><li><a href="/wiki/CPU_multiplier" title="CPU multiplier">CPU</a></li></ul></li> <li><a href="/wiki/Binary_decoder" title="Binary decoder">Binary decoder</a> <ul><li><a href="/wiki/Address_decoder" title="Address decoder">Address decoder</a></li> <li><a href="/wiki/Sum-addressed_decoder" title="Sum-addressed decoder">Sum-addressed decoder</a></li></ul></li> <li><a href="/wiki/Barrel_shifter" title="Barrel shifter">Barrel shifter</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Electronic_circuit" title="Electronic circuit">Circuitry</a></th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Integrated_circuit" title="Integrated circuit">Integrated circuit</a> <ul><li><a href="/wiki/Three-dimensional_integrated_circuit" title="Three-dimensional integrated circuit">3D</a></li> <li><a href="/wiki/Mixed-signal_integrated_circuit" title="Mixed-signal integrated circuit">Mixed-signal</a></li> <li><a href="/wiki/Power_management_integrated_circuit" title="Power management integrated circuit">Power management</a></li></ul></li> <li><a href="/wiki/Boolean_circuit" title="Boolean circuit">Boolean</a></li> <li><a href="/wiki/Circuit_(computer_science)" title="Circuit (computer science)">Digital</a></li> <li><a href="/wiki/Analogue_electronics" title="Analogue electronics">Analog</a></li> <li><a href="/wiki/Quantum_circuit" title="Quantum circuit">Quantum</a></li> <li><a href="/wiki/Switch#Electronic_switches" title="Switch">Switch</a></li></ul> </div></td></tr></tbody></table><div> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Power_management" title="Power management">Power<br />management</a></th><td class="navbox-list-with-group navbox-list navbox-even hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Power_Management_Unit" title="Power Management Unit">PMU</a></li> <li><a href="/wiki/Advanced_Power_Management" title="Advanced Power Management">APM</a></li> <li><a href="/wiki/ACPI" title="ACPI">ACPI</a></li> <li><a href="/wiki/Dynamic_frequency_scaling" title="Dynamic frequency scaling">Dynamic frequency scaling</a></li> <li><a href="/wiki/Dynamic_voltage_scaling" title="Dynamic voltage scaling">Dynamic voltage scaling</a></li> <li><a href="/wiki/Clock_gating" title="Clock gating">Clock gating</a></li> <li><a href="/wiki/Performance_per_watt" title="Performance per watt">Performance per watt</a> (PPW)</li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Related</th><td class="navbox-list-with-group navbox-list navbox-odd hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/History_of_general-purpose_CPUs" title="History of general-purpose CPUs">History of general-purpose CPUs</a></li> <li><a href="/wiki/Microprocessor_chronology" title="Microprocessor chronology">Microprocessor chronology</a></li> <li><a href="/wiki/Processor_design" title="Processor design">Processor design</a></li> <li><a href="/wiki/Digital_electronics" title="Digital electronics">Digital electronics</a></li> <li><a href="/wiki/Hardware_security_module" title="Hardware security module">Hardware security module</a></li> <li><a href="/wiki/Semiconductor_device_fabrication" title="Semiconductor device fabrication">Semiconductor device fabrication</a></li> <li><a href="/wiki/Tick%E2%80%93tock_model" title="Tick–tock model">Tick–tock model</a></li> <li><a href="/wiki/Pin_grid_array" title="Pin grid array">Pin grid array</a></li> <li><a href="/wiki/Chip_carrier" title="Chip carrier">Chip carrier</a></li></ul> </div></td></tr></tbody></table></div>    </div><noscript><img src="https://login.wikimedia.org/wiki/Special:CentralAutoLogin/start?type=1x1" alt="" width="1" height="1" style="border: none; position: absolute;"></noscript> <div class="printfooter" data-nosnippet="">Retrieved from "<a dir="ltr" href="https://en.wikipedia.org/w/index.php?title=Execution_(computing)&oldid=1250519964">https://en.wikipedia.org/w/index.php?title=Execution_(computing)&oldid=1250519964</a>"</div></div> <div id="catlinks" class="catlinks" data-mw="interface"><div id="mw-normal-catlinks" class="mw-normal-catlinks"><a href="/wiki/Help:Category" title="Help:Category">Category</a>: <ul><li><a href="/wiki/Category:Computing_terminology" title="Category:Computing terminology">Computing terminology</a></li></ul></div><div id="mw-hidden-catlinks" class="mw-hidden-catlinks mw-hidden-cats-hidden">Hidden categories: <ul><li><a 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