Key sections to start with are: Events, One-Liners, Presentations, Prerequisites, CPU statistics, Timed Profiling, and Flame Graphs.Īlso see my Posts about perf_events, and Links for the main (official) perf_events page, awesome tutorial, and other links. This page includes my examples of perf_events. My perf-tools collection (github) uses both perf_events and ftrace as needed. While it uses many Linux tracing features, some are not yet exposed via the perf command, and need to be used via the ftrace interface instead. Perf_events is part of the Linux kernel, under tools/perf. What reasons are threads leaving the CPU?.Is a certain kernel function being called, and how often?.Which code-paths are allocating memory, and how much?.Which code-paths are causing CPU level 2 cache misses?.

Why is the kernel on-CPU so much? What code-paths?.

Perf_events is an event-oriented observability tool, which can help you solve advanced performance and troubleshooting functions. This is not an official perf page, for either perf_events or the T-shirt. Searching for just 'perf' finds sites on the police, petroleum, weed control, and a T-shirt. Like Vince Weaver, I'll call it perf_events so that you can search on that term later. These are some examples of using the perf Linux profiler, which has also been called Performance Counters for Linux (PCL), Linux perf events (LPE), or perf_events. Image license: creative commons Attribution-ShareAlike 4.0. YOW! 2018 Cloud Performance Root Cause Analysis at Netflix Two kernel mysteries and the most technical talk I've ever seenīPF Performance Tools: Linux System and Application Observability (book) Systems Performance: Enterprise and the Cloud, 2nd Edition

How To Add eBPF Observability To Your ProductīPF binaries: BTF, CO-RE, and the future of BPF perf tools USENIX LISA2021 Computing Performance: On the Horizon

Kernel stack size