https://300watts.me/tags/pmu/Recent content in Pmu on 300.WattsHugoenmorristai01@gmail.com (Morris)morristai01@gmail.com (Morris)This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.Mon, 09 Oct 2023 10:04:55 +0800https://300watts.me/posts/rust-profiling-essentials-with-perf/Mon, 09 Oct 2023 10:04:55 +0800morristai01@gmail.com (Morris)https://300watts.me/posts/rust-profiling-essentials-with-perf/<h2 id="what-is-profiling" class="headerLink"> <a href="#what-is-profiling" class="header-mark"></a>What is profiling?</h2><blockquote> <p>A: <strong>Sampling</strong> the program <strong>at specific times</strong>, and do some statistics analysis.</p> </blockquote><p>It can be one of the following:</p> <ul> <li><strong>Reading Backtraces</strong> of the program for every 1000th cycles, and represent in flamegraph.</li> <li><strong>Reading Backtraces</strong> of the program for every 1000th cache miss, and represent in flamegraph.</li> <li><strong>Reading Backtraces</strong> of the program for every 10th memory allocation, and represent in flamegraph.</li> <li><strong>Get return address</strong> of the program for every 10th memory allocation, and show counts for every line.</li> </ul> <h2 id="how-to-trigger-a-sample" class="headerLink"> <a href="#how-to-trigger-a-sample" class="header-mark"></a>How to trigger a sample?</h2><p>Kind of triggers:</p>