#hardware-counters #performance-counters

sys papi-sys

PAPI (Performance API) bindings for Rust

2 releases

0.1.1 Nov 18, 2019
0.1.0 Nov 14, 2019

#99 in Profiling

Used in papi


99 lines



First, add the following to your Cargo.toml:

papi-sys = "0.1.0"

Before building, ensure that PAPI is installed on your system.

What is papi-sys?

The purpose of this crate is to provide 1:1 bindings for papi.h. PAPI is a library that provides a consistent interface to hardware performance counters. Visit the PAPI website for more information.

Note that this crate does not provide a high-level interface to PAPI.

Environment Variables

There are two environment variables to specify a custom PAPI library path:

  • PAPI_PREFIX: required to generate bindings.rs
  • LD_LIBRARY_PATH: required to dynamically link libpapi.so

Let's assume you installed PAPI in /opt/papi/5.7.0/, then you can test by

$ PAPI_PREFIX=/opt/papi/5.7.0/ LD_LIBRARY_PATH=/opt/papi/5.7.0/lib:$LD_LIBRARY_PATH cargo test

To avoid setting LD_LIBRARY_PATH, you can configure the search path globally by running:

$ sudo echo "/opt/papi/5.7.0/" > /etc/ld.so.conf.d/papi.conf
$ sudo ldconfig


The following platforms are currently tested:

  • x86_64-unknown-linux-gnu
  • powerpc64le-unknown-linux-gnu


The following dependency versions are currently required:

  • rustc >= 1.36
  • gcc >= 4.8 or clang >= 3.8


Licensed under either of

at your option.


Unless you explicitly state otherwise, any contribution intentionally submitted for inclusion in the work by you, as defined in the Apache-2.0 license, shall be dual licensed as above, without any additional terms or conditions.


~40K SLoC