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<section id="updates-in-2023-3">
<h1>Updates in 2023.3<a class="headerlink" href="#updates-in-2023-3" title="Permalink to this headline"></a></h1>
<p><strong>General</strong></p>
<ul class="simple">
<li><p>NVIDIA Nsight Compute now supports collecting many metrics by <a class="reference external" href="../ProfilingGuide/index.html#pm-sampling">sampling the GPU’s performance monitors (PM)</a> periodically at fixed intervals. The results can be visualized on a <a class="reference external" href="../NsightCompute/index.html#details-page">timeline</a>.</p></li>
<li><p>Added WSL profiling support on Windows 10 WSL with OS build version 19044 and greater. WSL profiling is not supported on Windows 10 WSL for systems that exceed 1 TB of system memory.</p></li>
<li><p>Rule outputs are prioritized to improve the accuracy of estimated speedups. The <a class="reference external" href="../NsightCompute/index.html#summary-page">Summary</a> page now shows the most actionable optimization advices when a result row is selected.</p></li>
<li><p>Improved the handling and reporting for unavailable metrics during collection and when applying rules.</p></li>
<li><p>Added <em>instructionMix</em> sample CUDA application and document to show how to use NVIDIA Nsight Compute to analyze and identify the performance bottleneck due to an imbalanced instruction mix. Refer to the <code class="docutils literal notranslate"><span class="pre">README.TXT</span></code> file, sample code, and document under <code class="docutils literal notranslate"><span class="pre">extras/samples/instructionMix</span></code>.</p></li>
</ul>
<p><strong>NVIDIA Nsight Compute</strong></p>
<ul class="simple">
<li><p>Added support to see the source files of two profile results side by side using <a class="reference external" href="../NsightCompute/index.html#source-comparison">Source Comparison</a>. This allows you to quickly identify source differences and understand changes in metric values.</p></li>
<li><p>The <a class="reference external" href="../NsightCompute/index.html#summary-page">Summary</a> page is now the default page when a report is opened. Previous behavior can be enabled in the <a class="reference external" href="../NsightCompute/index.html#profile">options</a> dialog.</p></li>
<li><p>On the <a class="reference external" href="../NsightCompute/index.html#summary-page">Summary</a> and <a class="reference external" href="../NsightCompute/index.html#raw-page">Raw</a> pages, values from all/selected rows are automatically aggregated in the column header for applicable metrics. Selected individual cells are aggregated in the bottom status bar.</p></li>
<li><p>Added <code class="docutils literal notranslate"><span class="pre">Launch</span> <span class="pre">Name</span></code> and <code class="docutils literal notranslate"><span class="pre">Device</span></code> options in the filter dialog launched by <code class="docutils literal notranslate"><span class="pre">Apply</span> <span class="pre">Filters</span></code> button in the <a class="reference external" href="../NsightCompute/index.html#profiler-report-header">report header</a>.</p></li>
<li><p>Added support for <a class="reference external" href="../NsightCompute/index.html#profiles">source view profiles</a> that persist the Source page configuration and allow you to re-apply it to other reports.</p></li>
<li><p>The <a class="reference external" href="../NsightCompute/index.html#metric-details">Metric Details</a> tool window now supports querying metrics beyond the current report by using the <code class="docutils literal notranslate"><span class="pre">chip:<chipname></span></code> tag in the search.</p></li>
<li><p>Added support for <em>CUDA Graph Edge Data</em> (such as port and dependency type) and <em>CUDA Graph Conditional Handles</em> in the <a class="reference external" href="../NsightCompute/index.html#resources">Resources</a> tool window.</p></li>
<li><p>The <a class="reference external" href="../NsightCompute/index.html#acceleration-structure-viewer">Acceleration Structure Viewer</a> and <a class="reference external" href="../NsightCompute/index.html#resources">Resources</a> tool window now support OptiX Opacity Micromaps.</p></li>
</ul>
<p><strong>NVIDIA Nsight Compute CLI</strong></p>
<ul class="simple">
<li><p>Tracking and profiling all child processes (<code class="docutils literal notranslate"><span class="pre">--target-processes</span> <span class="pre">all</span></code>) is now the default for ncu.</p></li>
<li><p>Improved reporting of requested but unavailable metrics. Metrics requested in section files are by default considered optional and only cause a warning to be shown.</p></li>
</ul>
<p><strong>Resolved Issues</strong></p>
<ul class="simple">
<li><p>Support for tracking child processes launched with <code class="docutils literal notranslate"><span class="pre">system()</span></code> is available on Linux ppc64le.</p></li>
<li><p>Improved the behavior of following SASS navigation links on the Source page.</p></li>
<li><p>Fixed issues with profiling CUDA graphs in graph-profiling mode when nodes are associated with a non-current CUDA context.</p></li>
<li><p>Fixed an issue in L2 bandwidth calculations in the hierarchical roofline sections.</p></li>
</ul>
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