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[v4,0/2] rt-tests: cyclictest: Add option to specify main pid affinity

Message ID 20210518083712.8237-1-schwenderjonathan@gmail.com
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Series rt-tests: cyclictest: Add option to specify main pid affinity | expand

Message

Jonathan Schwender May 18, 2021, 8:37 a.m. UTC 
Hi John,

Changes in v4:
- Rolled back the error wrapper changes around numa_sched_setaffinity.
  I still extracted the error handling code into a function, but since it's
  only used locally it looks a lot nicer.
- Rebased onto latest commit c9051a36 ("ssdd: Add JSON output feature")
  in unstable/devel/latest.


This patch adds the option --mainaffinity to specify the affinity of
the main pid.
This is mainly useful if you want to bind the main thread to a
different (e.g. housekeeping ) CPU than the measurement threads.
Some of the potential benefits of using this option are presented in
a previous email: https://lore.kernel.org/linux-rt-users/dd40b81d-7099-7740-c2ad-64b49e582234@gmail.com/

Jonathan Schwender (2):
  cyclictest: Move main pid setaffinity handling into a function
  cyclictest: Add --mainaffinity=[CPUSET] option.

 src/cyclictest/cyclictest.c | 39 ++++++++++++++++++++++++++++---------
 1 file changed, 30 insertions(+), 9 deletions(-)