PAPI: The Performance Application Programming Interface
Innovative Computing Laboratory (ICL)
University of Tennessee, Knoxville (UTK)
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The Performance Application Programming Interface (PAPI) provides tool designers and application engineers with a consistent interface and methodology for the use of low-level performance counter hardware found across the entire compute system (i.e. CPUs, GPUs, on/off-chip memory, interconnects, I/O system, energy/power, etc.). PAPI enables users to see, in near real time, the relations between software performance and hardware events across the entire computer system.
The ECP Exa-PAPI project builds on the latest PAPI project and extends it with:
The objective is to enable monitoring of both types of performance events---hardware- and software-related events---in a uniform way, through one consistent PAPI interface. Third-party tools and application developers will have to handle only a single hook to PAPI in order to access all hardware performance counters in a system, including the new software-defined events.
The PAPI project welcomes contributions from new developers. Contributions can be offered through the standard GitHub pull request model. We strongly encourage you to coordinate large contributions with the PAPI development team early in the process.
For timely pull request reviews and feedback, it is important to submit one (1) pull request per feature / bug fix.
In order to create a pull request on a public read-only repo, you will need to do the following:
Fork the PAPI repo (click "+" on the left and "Fork this repository").
Clone it.
Make your changes and push them.
Click "create pull request" from your repo (not the PAPI repo).
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