How does Bluefield-3 DPA access CPU memory in DPU mode? - Enterprise Networking

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access CPU memory?\n\nThank you for any help!","upvoteCount":0,"answerCount":0,"datePublished":"2024-05-21T07:43:58.469Z","author":{"@type":"Person","name":"hjk020101","url":"https://forums.developer.nvidia.com/u/hjk020101"}}}</script> </head> <body class="crawler browser-update"> <header> <a href="/"> NVIDIA Developer Forums </a> </header> <div id="main-outlet" class="wrap" role="main"> <div id="topic-title"> <h1> <a href="/t/how-does-bluefield-3-dpa-access-cpu-memory-in-dpu-mode/293548">How does Bluefield-3 DPA access CPU memory in DPU mode?</a> </h1> <div class="topic-category" itemscope itemtype="http://schema.org/BreadcrumbList"> <span itemprop="itemListElement" itemscope itemtype="http://schema.org/ListItem"> <a href="/c/infrastructure/doca/networking/374" class="badge-wrapper bullet" itemprop="item"> <span class='badge-category-bg' style='background-color: #76B900'></span> <span class='badge-category clear-badge'> <span class='category-name' itemprop='name'>Infrastructure & Networking</span> </span> </a> <meta itemprop="position" content="1" /> </span> <span itemprop="itemListElement" itemscope itemtype="http://schema.org/ListItem"> <a href="/c/infrastructure/doca/networking/374" class="badge-wrapper bullet" itemprop="item"> <span class='badge-category-bg' style='background-color: #76B900'></span> <span class='badge-category clear-badge'> <span class='category-name' itemprop='name'>DOCA</span> </span> </a> <meta itemprop="position" content="2" /> </span> <span itemprop="itemListElement" itemscope itemtype="http://schema.org/ListItem"> <a href="/c/infrastructure/doca/networking/374" class="badge-wrapper bullet" itemprop="item"> <span class='badge-category-bg' style='background-color: #76B900'></span> <span class='badge-category clear-badge'> <span class='category-name' itemprop='name'>Enterprise Networking</span> </span> </a> <meta itemprop="position" content="3" /> </span> </div> </div> <div itemscope itemtype='http://schema.org/DiscussionForumPosting'> <meta itemprop='headline' content='How does Bluefield-3 DPA access CPU memory in DPU mode?'> <link itemprop='url' href='https://forums.developer.nvidia.com/t/how-does-bluefield-3-dpa-access-cpu-memory-in-dpu-mode/293548'> <meta itemprop='datePublished' content='2024-05-21T07:43:58Z'> <meta itemprop='articleSection' content='Enterprise Networking'> <meta itemprop='keywords' content=''> <div itemprop='publisher' itemscope itemtype="http://schema.org/Organization"> <meta itemprop='name' content='NVIDIA'> <div itemprop='logo' itemscope itemtype="http://schema.org/ImageObject"> <meta itemprop='url' content='https://global.discourse-cdn.com/nvidia/original/3X/a/1/a1ef6e0c1fbd3fad5bf82538b78dfaa9c5fa1a61.png'> </div> </div> <div id='post_1' class='topic-body crawler-post'> <div class='crawler-post-meta'> <span class="creator" itemprop="author" itemscope itemtype="http://schema.org/Person"> <a itemprop="url" href='https://forums.developer.nvidia.com/u/hjk020101'><span itemprop='name'>hjk020101</span></a> </span> <link itemprop="mainEntityOfPage" href="https://forums.developer.nvidia.com/t/how-does-bluefield-3-dpa-access-cpu-memory-in-dpu-mode/293548"> <span class="crawler-post-infos"> <time datetime='2024-05-21T07:43:58Z' class='post-time'> May 21, 2024, 7:43am </time> <meta itemprop='dateModified' content='2024-05-21T07:43:58Z'> <span itemprop='position'>1</span> </span> </div> <div class='post' itemprop='text'> <p>Hi!</p> <blockquote> <p>In DPU mode, the NIC resources and functionality are owned and controlled by the embedded Arm subsystem.</p> </blockquote> <p>DPA can use <code>flexio_copy_{from/to}_host</code> to access Arm memory, but how can DPA access CPU memory?</p> <p>Thank you for any help!</p> </div> <div itemprop="interactionStatistic" itemscope itemtype="http://schema.org/InteractionCounter"> <meta itemprop="interactionType" content="http://schema.org/LikeAction"/> <meta itemprop="userInteractionCount" content="0" /> <span class='post-likes'></span> </div> </div> <div id='post_2' itemprop='comment' itemscope itemtype='http://schema.org/Comment' class='topic-body crawler-post'> <div class='crawler-post-meta'> <span class="creator" itemprop="author" itemscope itemtype="http://schema.org/Person"> <a itemprop="url" href='https://forums.developer.nvidia.com/u/Levei_Luo'><span itemprop='name'>Levei_Luo</span></a> </span> <span class="crawler-post-infos"> <time itemprop='datePublished' datetime='2024-07-05T08:57:54Z' class='post-time'> July 5, 2024, 8:57am </time> <meta itemprop='dateModified' content='2024-07-05T08:57:54Z'> <span itemprop='position'>2</span> </span> </div> <div class='post' itemprop='text'> <p>Maybe you want to know ‘External registered memory’.<br> Check the below content that demonstrates the window management.<br> Not pretty sure if this is just what you want.</p> <p><a href="https://docs.nvidia.com/doca/sdk/dpa+development/index.html#src-2681265977_id-.DPADevelopmentv2.7.0-FlexIOMemoryManagement" class="onebox" target="_blank" rel="noopener nofollow ugc">https://docs.nvidia.com/doca/sdk/dpa+development/index.html#src-2681265977_id-.DPADevelopmentv2.7.0-FlexIOMemoryManagement</a></p> </div> <div itemprop="interactionStatistic" itemscope itemtype="http://schema.org/InteractionCounter"> <meta itemprop="interactionType" content="http://schema.org/LikeAction"/> <meta itemprop="userInteractionCount" content="0" /> <span class='post-likes'></span> </div> </div> </div> <div id="related-topics" class="more-topics__list " role="complementary" aria-labelledby="related-topics-title"> <h3 id="related-topics-title" class="more-topics__list-title"> Related topics </h3> <div class="topic-list-container" itemscope itemtype='http://schema.org/ItemList'> <meta itemprop='itemListOrder' content='http://schema.org/ItemListOrderDescending'> <table class='topic-list'> 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</td> </tr> <tr class="topic-list-item" id="topic-list-item-267640"> <td class="main-link" itemprop='itemListElement' itemscope itemtype='http://schema.org/ListItem'> <meta itemprop='position' content='3'> <span class="link-top-line"> <a itemprop='url' href='https://forums.developer.nvidia.com/t/connect-the-dpu-and-the-host-using-the-ethernet-interface-of-the-dpu/267640' class='title raw-link raw-topic-link'>Connect the DPU and the host using the Ethernet interface of the DPU</a> </span> <div class="link-bottom-line"> <a href='/c/infrastructure/bluefield/511' class='badge-wrapper bullet'> <span class='badge-category-bg' style='background-color: #76B900'></span> <span class='badge-category clear-badge'> <span class='category-name'>BlueField</span> </span> </a> <div class="discourse-tags"> <a href='https://forums.developer.nvidia.com/tag/bluefield-smartnic' class='discourse-tag'>bluefield-smartnic</a> </div> </div> </td> <td class="replies"> <span class='posts' title='posts'>1</span> </td> <td class="views"> <span class='views' title='views'>687</span> </td> <td> October 13, 2023 </td> </tr> <tr class="topic-list-item" id="topic-list-item-12644"> <td class="main-link" itemprop='itemListElement' itemscope itemtype='http://schema.org/ListItem'> <meta itemprop='position' content='4'> <span class="link-top-line"> <a itemprop='url' href='https://forums.developer.nvidia.com/t/dma/12644' class='title raw-link raw-topic-link'>DMA</a> </span> <div class="link-bottom-line"> <a href='/c/accelerated-computing/cuda/cuda-programming-and-performance/7' class='badge-wrapper bullet'> <span class='badge-category-bg' style='background-color: #76B900'></span> <span class='badge-category clear-badge'> <span class='category-name'>CUDA Programming and Performance</span> </span> </a> <div class="discourse-tags"> </div> </div> </td> <td class="replies"> <span class='posts' title='posts'>4</span> </td> <td class="views"> <span class='views' title='views'>7982</span> </td> <td> October 8, 2009 </td> </tr> <tr class="topic-list-item" id="topic-list-item-142662"> <td class="main-link" itemprop='itemListElement' itemscope itemtype='http://schema.org/ListItem'> <meta itemprop='position' content='5'> <span class="link-top-line"> <a itemprop='url' href='https://forums.developer.nvidia.com/t/how-to-use-memory-allocated-by-dma-alloc-coherent-in-cuda/142662' class='title raw-link raw-topic-link'>How to use memory allocated by dma_alloc_coherent() in cuda</a> </span> <div class="link-bottom-line"> <a href='/c/agx-autonomous-machines/jetson-embedded-systems/jetson-tx2/81' class='badge-wrapper bullet'> <span class='badge-category-bg' style='background-color: #76B900'></span> <span class='badge-category clear-badge'> <span class='category-name'>Jetson TX2</span> </span> </a> <div class="discourse-tags"> <a href='https://forums.developer.nvidia.com/tag/cuda' class='discourse-tag'>cuda</a> </div> </div> </td> <td class="replies"> <span class='posts' title='posts'>6</span> </td> <td class="views"> <span class='views' title='views'>921</span> </td> <td> October 18, 2021 </td> </tr> <tr class="topic-list-item" id="topic-list-item-9880"> <td class="main-link" itemprop='itemListElement' itemscope itemtype='http://schema.org/ListItem'> <meta itemprop='position' content='6'> <span class="link-top-line"> <a itemprop='url' href='https://forums.developer.nvidia.com/t/how-to-use-dma-in-cuda/9880' class='title raw-link raw-topic-link'>how to use DMA in CuDa</a> </span> <div class="link-bottom-line"> <a href='/c/accelerated-computing/cuda/cuda-programming-and-performance/7' class='badge-wrapper bullet'> <span class='badge-category-bg' style='background-color: #76B900'></span> <span class='badge-category clear-badge'> <span class='category-name'>CUDA Programming and Performance</span> </span> </a> <div class="discourse-tags"> </div> </div> </td> <td class="replies"> <span class='posts' title='posts'>1</span> </td> <td class="views"> <span class='views' title='views'>2934</span> </td> <td> June 3, 2009 </td> </tr> <tr class="topic-list-item" id="topic-list-item-1393"> <td class="main-link" itemprop='itemListElement' itemscope itemtype='http://schema.org/ListItem'> <meta itemprop='position' content='7'> <span class="link-top-line"> <a itemprop='url' href='https://forums.developer.nvidia.com/t/linux-splice-for-dma-copy/1393' class='title raw-link raw-topic-link'>linux splice() for DMA copy</a> </span> <div class="link-bottom-line"> <a href='/c/accelerated-computing/cuda/cuda-programming-and-performance/7' class='badge-wrapper bullet'> <span class='badge-category-bg' style='background-color: #76B900'></span> <span class='badge-category clear-badge'> <span class='category-name'>CUDA Programming and Performance</span> </span> </a> <div class="discourse-tags"> </div> </div> </td> <td class="replies"> <span class='posts' title='posts'>1</span> </td> <td class="views"> <span class='views' title='views'>5422</span> </td> <td> August 29, 2007 </td> </tr> <tr class="topic-list-item" id="topic-list-item-281824"> <td class="main-link" itemprop='itemListElement' itemscope itemtype='http://schema.org/ListItem'> <meta itemprop='position' content='8'> <span class="link-top-line"> <a itemprop='url' href='https://forums.developer.nvidia.com/t/bluefield-2-accessing-gpu-in-the-same-server/281824' class='title raw-link raw-topic-link'>Bluefield-2 accessing GPU in the same server</a> </span> <div class="link-bottom-line"> <a href='/c/infrastructure/bluefield/511' class='badge-wrapper bullet'> <span class='badge-category-bg' style='background-color: #76B900'></span> <span class='badge-category clear-badge'> <span class='category-name'>BlueField</span> </span> </a> <div class="discourse-tags"> <a href='https://forums.developer.nvidia.com/tag/cuda' class='discourse-tag'>cuda</a> ,  <a href='https://forums.developer.nvidia.com/tag/ai' class='discourse-tag'>ai</a> ,  <a href='https://forums.developer.nvidia.com/tag/gpu' class='discourse-tag'>gpu</a> ,  <a href='https://forums.developer.nvidia.com/tag/gpu-computing' class='discourse-tag'>gpu-computing</a> </div> </div> </td> <td class="replies"> <span class='posts' title='posts'>2</span> </td> <td class="views"> <span class='views' title='views'>522</span> </td> <td> February 19, 2024 </td> </tr> <tr class="topic-list-item" id="topic-list-item-148068"> <td class="main-link" itemprop='itemListElement' itemscope itemtype='http://schema.org/ListItem'> <meta itemprop='position' content='9'> <span class="link-top-line"> <a itemprop='url' href='https://forums.developer.nvidia.com/t/pcie-dma-transfer-data/148068' class='title raw-link raw-topic-link'>Pcie dma transfer data</a> </span> <div class="link-bottom-line"> <a href='/c/agx-autonomous-machines/jetson-embedded-systems/jetson-agx-xavier/75' class='badge-wrapper bullet'> <span class='badge-category-bg' style='background-color: #76B900'></span> <span class='badge-category clear-badge'> <span class='category-name'>Jetson AGX Xavier</span> </span> </a> <div class="discourse-tags"> <a href='https://forums.developer.nvidia.com/tag/pcie' class='discourse-tag'>pcie</a> </div> </div> </td> <td class="replies"> <span class='posts' title='posts'>5</span> </td> <td class="views"> <span class='views' title='views'>728</span> </td> <td> October 18, 2021 </td> </tr> <tr class="topic-list-item" id="topic-list-item-260"> <td class="main-link" itemprop='itemListElement' itemscope itemtype='http://schema.org/ListItem'> <meta itemprop='position' content='10'> <span class="link-top-line"> <a itemprop='url' href='https://forums.developer.nvidia.com/t/using-dma-memory-transfers/260' class='title raw-link raw-topic-link'>Using dma memory transfers</a> </span> <div class="link-bottom-line"> <a href='/c/accelerated-computing/cuda/cuda-programming-and-performance/7' class='badge-wrapper bullet'> <span class='badge-category-bg' style='background-color: #76B900'></span> <span class='badge-category clear-badge'> <span class='category-name'>CUDA Programming and Performance</span> </span> </a> <div class="discourse-tags"> </div> </div> </td> <td class="replies"> <span class='posts' title='posts'>2</span> </td> <td class="views"> <span class='views' title='views'>8084</span> </td> <td> February 23, 2007 </td> </tr> </tbody> </table> </div> </div> </div> <footer class="container wrap"> <nav class='crawler-nav'> <ul> <li itemscope itemtype='http://schema.org/SiteNavigationElement'> <span itemprop='name'> <a href='/' itemprop="url">Home </a> </span> </li> <li itemscope itemtype='http://schema.org/SiteNavigationElement'> <span itemprop='name'> <a href='/categories' itemprop="url">Categories </a> </span> </li> <li itemscope itemtype='http://schema.org/SiteNavigationElement'> <span itemprop='name'> <a href='/guidelines' itemprop="url">Guidelines </a> </span> </li> <li itemscope itemtype='http://schema.org/SiteNavigationElement'> <span itemprop='name'> <a 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How does Bluefield-3 DPA access CPU memory in DPU mode? - Enterprise Networking - NVIDIA Developer Forums