https://github.com/anpep/cache_query

Utilities for performance event measurement in Linux
https://github.com/anpep/cache_query

c cache linux perf performance python

Last synced: 19 days ago
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Utilities for performance event measurement in Linux

• Host: GitHub
• URL: https://github.com/anpep/cache_query
• Owner: anpep
• License: other
• Created: 2019-12-26T18:16:36.000Z (almost 5 years ago)
• Default Branch: master
• Last Pushed: 2020-02-08T12:02:25.000Z (almost 5 years ago)
• Last Synced: 2024-04-17T17:53:25.432Z (8 months ago)
• Topics: c, cache, linux, perf, performance, python
• Language: C
• Homepage:
• Size: 9.77 KB
• Stars: 0
• Watchers: 2
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README
  • License: COPYING

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README

        
cache_query

===========

Introduction

------------

cache_query is an experimental (and buggy) framework for simple cache access

benchmarks on C programs.

In order to write a benchmark, include your C program inside of the `test'

directory and annotate it accordingly. For instance,

    1   //! var variantName_16: -DCOLS=16 -DHELLO

    2   //! var variantName_32: -DCOLS=32 -DEXAMPLE

Note that the syntax for variant specification is as follows:

    

    //! var _: 

The supplied  will be the value of the X axis in the generated plot,

while the Y axis will hold the cache miss rate captured during execution.

Hacking

-------

cache_query relies on the perf_event_open(2) system call for counting hardware

performance events (PERF_COUNT_HW_CACHE_MISSES and PERF_COUNT_HW_CACHE_REFERENCES

as of now). Refer to the cache_query.c file in order to add or remove performance

counters.

The current code for reading child process events is somewhat buggy, and may not

be indicative of the real state of the executing process. Don't use cache_query

for production or mission-critical systems.

Contact

-------

Contact angel  for any question or suggestion regarding this software.

Licensing

---------

This software is licensed under the public domain and may be modified and

redistributed at will with no restrictions or licensing constraints.