https://github.com/andikleen/perf-gcov

autofdo implemented in perf
https://github.com/andikleen/perf-gcov

Last synced: 11 days ago
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autofdo implemented in perf

• Host: GitHub
• URL: https://github.com/andikleen/perf-gcov
• Owner: andikleen
• Created: 2024-09-15T18:38:26.000Z (2 months ago)
• Default Branch: master
• Last Pushed: 2024-09-15T18:50:54.000Z (2 months ago)
• Last Synced: 2024-09-15T20:07:49.984Z (2 months ago)
• Language: Python
• Size: 29.3 KB
• Stars: 0
• Watchers: 1
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README

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README

        
perf based replacement for autofdo to generate profile feedback data for gcc's -fauto-profile option.

Eventual goal is to support an online modus that supports contiguous profiling of the system

and then rebuilding pieces with profile feedback.

Requires a perf tool with the patches in

https://git.kernel.org/pub/scm/linux/kernel/git/ak/linux-misc.git/log/?h=perf/brstack-resolve-1

Synopsis:

gcc -g -O2 -o workload ...

perf record -b -c 100003 -e branches:upp workload

gcov.py --binary workload --gcov file.gcov

gcc -fauto-profile=file.gcov -o workload.opt -O2 -g ...

Status:

Should work for basic operations, but still various issues and needs more testing.