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 perf_data_converter but seems that it doesn't support dwarf stacks. So I tried to start from scratch in Rust rather than playing with the C++ code.

Installation

cargo install perf-tools

Usage

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

$ 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:

$ 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.