Nsight shows made-up mipmaps for 2D array images. - Nsight Visual Studio Edition

<!DOCTYPE html> <html lang="en"> <head> <meta charset="utf-8"> <title>Nsight shows made-up mipmaps for 2D array images. - Nsight Visual Studio Edition - NVIDIA Developer Forums</title> <meta name="description" content="Version 5.5.0.18014 Took me a while to realize that NSight is lying about the mipmap contents. Was puzzled by a weird mipmaping glitch as everything looked correct at NSight side. 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Was puzzled by a weird mipmaping glitch as everything looked correct at NSight side. Specifically NSight shows his own auto-generated mipmaps for VK_FORMAT_BC3_UNORM_BLOCK 2D array images - and NOT what they actually contain. Correct behavior: either do not show mipmaps at all or show their actual content. Is this a known bug? Is it fixed in latest release?" /> <meta name="twitter:description" content="Version 5.5.0.18014 Took me a while to realize that NSight is lying about the mipmap contents. Was puzzled by a weird mipmaping glitch as everything looked correct at NSight side. Specifically NSight shows his own auto-generated mipmaps for VK_FORMAT_BC3_UNORM_BLOCK 2D array images - and NOT what they actually contain. Correct behavior: either do not show mipmaps at all or show their actual content. Is this a known bug? Is it fixed in latest release?" /> <meta property="og:article:section" content="Developer Tools" /> <meta property="og:article:section:color" content="76B900" /> <meta property="og:article:section" content="Nsight Visual Studio Edition" /> <meta property="og:article:section:color" content="76B900" /> <meta property="article:published_time" content="2018-06-29T20:14:03+00:00" /> <meta property="og:ignore_canonical" content="true" /> <script type="application/ld+json">{"@context":"http://schema.org","@type":"QAPage","name":"Nsight shows made-up mipmaps for 2D array images.","mainEntity":{"@type":"Question","name":"Nsight shows made-up mipmaps for 2D array images.","text":"Version 5.5.0.18014\n\nTook me a while to realize that NSight is lying about the mipmap contents. Was puzzled by a weird mipmaping glitch as everything looked correct at NSight side.\n\nSpecifically NSight shows his own auto-generated mipmaps for VK_FORMAT_BC3_UNORM_BLOCK 2D array images - and NOT what …","upvoteCount":0,"answerCount":0,"datePublished":"2018-06-29T20:14:03.000Z","author":{"@type":"Person","name":"tanzanite7","url":"https://forums.developer.nvidia.com/u/tanzanite7"}}}</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/nsight-shows-made-up-mipmaps-for-2d-array-images/62766">Nsight shows made-up mipmaps for 2D array images.</a> </h1> <div class="topic-category" itemscope itemtype="http://schema.org/BreadcrumbList"> <span itemprop="itemListElement" itemscope itemtype="http://schema.org/ListItem"> <a href="/c/developer-tools/nsight-visual-studio-edition/125" 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'>Developer Tools</span> </span> </a> <meta itemprop="position" content="1" /> </span> <span itemprop="itemListElement" itemscope itemtype="http://schema.org/ListItem"> <a href="/c/developer-tools/nsight-visual-studio-edition/125" 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'>Nsight Visual Studio Edition</span> </span> </a> <meta itemprop="position" content="2" /> </span> </div> </div> <div itemscope itemtype='http://schema.org/DiscussionForumPosting'> <meta itemprop='headline' content='Nsight shows made-up mipmaps for 2D array images.'> <link itemprop='url' href='https://forums.developer.nvidia.com/t/nsight-shows-made-up-mipmaps-for-2d-array-images/62766'> <meta itemprop='datePublished' content='2018-06-29T20:14:03Z'> <meta itemprop='articleSection' content='Nsight Visual Studio Edition'> <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" rel='nofollow' href='https://forums.developer.nvidia.com/u/tanzanite7'><span itemprop='name'>tanzanite7</span></a> </span> <link itemprop="mainEntityOfPage" href="https://forums.developer.nvidia.com/t/nsight-shows-made-up-mipmaps-for-2d-array-images/62766"> <span class="crawler-post-infos"> <time datetime='2018-06-29T20:14:03Z' class='post-time'> June 29, 2018, 8:14pm </time> <meta itemprop='dateModified' content='2018-06-29T20:14:03Z'> <span itemprop='position'>1</span> </span> </div> <div class='post' itemprop='text'> <p>Version 5.5.0.18014</p> <p>Took me a while to realize that NSight is lying about the mipmap contents. Was puzzled by a weird mipmaping glitch as everything looked correct at NSight side.</p> <p>Specifically NSight shows his own auto-generated mipmaps for VK_FORMAT_BC3_UNORM_BLOCK 2D array images - and NOT what they actually contain.</p> <p>Correct behavior: either do not show mipmaps at all or show their actual content.</p> <p>Is this a known bug? Is it fixed in latest release?</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" rel='nofollow' href='https://forums.developer.nvidia.com/u/codym'><span itemprop='name'>codym</span></a> </span> <span class="crawler-post-infos"> <time itemprop='datePublished' datetime='2018-07-04T03:51:20Z' class='post-time'> July 4, 2018, 3:51am </time> <meta itemprop='dateModified' content='2018-07-04T03:51:20Z'> <span itemprop='position'>2</span> </span> </div> <div class='post' itemprop='text'> <p>Hi tanzanite7,</p> <p>Do you have a sample app that can reproduce this issue?<br> Can you share it with us?<br> Thanks!</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_3' 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" rel='nofollow' href='https://forums.developer.nvidia.com/u/tanzanite7'><span itemprop='name'>tanzanite7</span></a> </span> <link itemprop="image" href="https://global.discourse-cdn.com/nvidia/original/3X/b/a/ba89cb49313a0e869198c8be354afde8bcae027e.png"> <span class="crawler-post-infos"> <time itemprop='datePublished' datetime='2018-07-05T23:26:46Z' class='post-time'> July 5, 2018, 11:26pm </time> <meta itemprop='dateModified' content='2018-07-05T23:26:46Z'> <span itemprop='position'>3</span> </span> </div> <div class='post' itemprop='text'> <p>While the problem is 100% reproducible, the app is not shareable at this time (too many internal dependencies). I have looked around to find some simple vulkan wrapper for this kind of purposes (something to make simple/rigid minimal test programs) - but have not found any. If you can point to any … might come handy later anyway (*).</p> <p>What i can say for sure:</p> <ul> <li>whatever i upload is exactly what is used to render (ex: if i upload pure white image with all mipmaps being pure red - then that is what i get it rendered as)</li> <li>Nsight shows only the base image correctly and all the actual mipmaps are ignored and downsampled versions of base image get shown instead.</li> </ul> <p>Image:</p> <ul> <li>1024x1024 8-layer image: VK_FORMAT_BC3_UNORM_BLOCK</li> <li>allocated with dedicated memory (vkExtDedicatedAllocNV)</li> <li>only 2 layers uploaded, the 0th being with unmistakably wrong mipmaps (ex: white image with all its mimpams being red - which NSight will show as also being pure white [or whatever the base image would downsample into])</li> </ul> <hr> <p>*) Off Topic: Currently there are some code changes underway and can not test much, but i recon i am gonna need something as i have encountered what seems to be an unrelated driver bug:</p><aside class="onebox allowlistedgeneric" data-onebox-src="https://community.khronos.org/t/depth-prepass-causes-z-fighting/7512"> <header class="source"> <img class="site-icon" src="https://global.discourse-cdn.com/nvidia/original/3X/f/f/ffafc32c00e3c13f89b70d0c51d0ea9f2fe35a80.png" width="32" height="32"> <a href="https://community.khronos.org/t/depth-prepass-causes-z-fighting/7512" target="_blank" rel="noopener nofollow ugc" title="11:34PM - 12 June 2018">Khronos Forums – 12 Jun 18</a> </header> <article class="onebox-body"> <img class="thumbnail" src="https://global.discourse-cdn.com/nvidia/original/3X/b/a/ba89cb49313a0e869198c8be354afde8bcae027e.png" width="500" height="500"> <h3><a href="https://community.khronos.org/t/depth-prepass-causes-z-fighting/7512" target="_blank" rel="noopener nofollow ugc">Depth prepass causes z-fighting.</a></h3> <p>Cannot get depth prepass to work as calculated depth values occasionally differ. Depth test fails in draw pass sporadically (sometimes for some view angles all depth values pass equality check in draw pass, sometimes nearly half will fail). ...</p> </article> <div class="onebox-metadata"> </div> <div style="clear: both"></div> </aside> <p>Current nvidia drivers seem to ignore or fail to adhere to “invariant” decoration in SPIR-V. At least no-one has come up with any other explanation.</p> <p>Probably going to need something to make a repro app when i get back to it.</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_4' 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" rel='nofollow' href='https://forums.developer.nvidia.com/u/codym'><span itemprop='name'>codym</span></a> </span> <span class="crawler-post-infos"> <time itemprop='datePublished' datetime='2018-07-16T08:49:20Z' class='post-time'> July 16, 2018, 8:49am </time> <meta itemprop='dateModified' content='2018-07-16T08:49:20Z'> <span itemprop='position'>4</span> </span> </div> <div class='post' itemprop='text'> <p>Hi tanzanite7,</p> <p>We have reproduced the issue, and have created an internal case to track it. We’ll let you know if there’s any update about it. Thanks!</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_5' 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" rel='nofollow' href='https://forums.developer.nvidia.com/u/codym'><span itemprop='name'>codym</span></a> </span> <span class="crawler-post-infos"> <time itemprop='datePublished' datetime='2018-08-06T10:30:55Z' class='post-time'> August 6, 2018, 10:30am </time> <meta itemprop='dateModified' content='2018-08-06T10:30:55Z'> <span itemprop='position'>5</span> </span> </div> <div class='post' itemprop='text'> <p>Hi tanzanite7,</p> <p>This issue has been confirmed fixed. 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Nsight shows made-up mipmaps for 2D array images. - Nsight Visual Studio Edition - NVIDIA Developer Forums