Perf-tools

Rust library for Linux perf.

The current feature is converting a perf.data file (CPU profiling) generated by the perf Linux profiler, into data for Google pprof tool.

I tried Google's perfdataconverter but seems that it doesn't support the latest kernel versions (I tried 73a346a with Linux 5.14). I tried to start from scratch in Rust rather than playing with the C++ code.

Installation

bash cargo install perf-tools

Usage

If you already have a perf.data file, just run perf2pprof command:

bash $ ls Cargo.lock Cargo.toml cpu.pprof perf.data src target $ perf2pprof

cargo perf command does everything as the above picture shows if you haven't run perf command yet.

Preparation

Firstly, better to have debugging symbols for the GNU C library (libc6-dbg package in Ubuntu).

Secondly, the following configuration might be necessary:

bash $ sudo sysctl -w kernel.kptr_restrict=0 $ echo -1 | sudo tee /proc/sys/kernel/perf_event_paranoid

Lastly, put the following in your Cargo.toml file:

[profile.release] debug = true

Caveat

Only a minimum of information are converted. It's on my to-do list. Of course, pull requests are very welcome.