Performance Application Programming Interface: Difference between revisions

Revision as of 15:07, 11 February 2025

Latest revision as of 18:51, 23 May 2025

(2 intermediate revisions by 2 users not shown)

Line 1:

{{Short description|Portable interface (in the form of aSoftware library) to hardware performance counters onfor modernmicroprocessor microprocessorsmetrics}}

In [[computer science]], '''Performance Application Programming Interface (PAPI)''' is a portable [[application programming interface|interface]] (in the form of a [[library (computing)|library]]) to [[hardware counter|hardware performance counters]] on modern [[microprocessor]]s. It is being widely used to collect low level performance metrics (e.g. [[Instruction (computer science)|instruction]] counts, [[clock cycle]]s, [[cache miss]]es) of computer systems running [[UNIX]]/[[Linux]] [[operating system]]s.

Line 6:

[[Operating system]] support for accessing hardware counters is needed to use PAPI.

For example, prior to 2010, a [[Linux (kernel)|Linux/x86 kernel]] had to be patched with a performance monitoring counters driver (perfctr [http://user.it.uu.se/~mikpe/linux/perfctr/ link]) to support PAPI.

Since Linux version 2.6.32, and PAPI 2010 releases, PAPI can leverage the existing perf subsystem in Linux, and thus does not need any out of tree driver to be functional anymore.

Line 14:

* [[Profiling (computer programming)|Performance analysis]]

== Further reading ==

* [httphttps://www.netlib.org/utk/people/JackDongarra/PAPERS/papi-journal-final.pdf A Portable Programming Interface for Performance Evaluation on Modern Processors] / International Journal of High Performance Computing Applications archive Volume 14 Issue 3, August 2000, Pagespages 189-204189–204 [[doi:10.1177/109434200001400303]] {{in lang|en}}

* Dongarra, Jack, et al. "[httphttps://www.netlib.org/utk/people/JackDongarra/PAPERS/papi-linux.pdf Using PAPI for hardware performance monitoring on Linux systems]" // Conference on Linux Clusters: The HPC Revolution. Vol. 5. Linux Clusters Institute, 2001. {{in lang|en}}

==External links ==

* [httphttps://icl.cs.utk.edu/papi/ Official site]

* Philip Mucci, [httphttps://www.drdobbs.com/tools/performance-monitoring-with-papi/184406109 Performance Monitoring with PAPI] / Dr.Dobbs, June 011, 2005

* [https://web.archive.org/web/20160303180716/http://berrendorf.inf.fh-brs.de/lehre/abschlussarbeiten/arbeiten/2009_Thesis_Fabian_Gorsler.pdf Development of a PAPI Backend for the Sun Niagara 2 Processor], 2009