[Bug 254040] AMD 5950X hyperthreading strange performance swings

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=254040

--- Comment #4 from Andriy Gapon <avg@FreeBSD.org> ---
(In reply to Stefan Eßer from comment #3)
Thank you for the tests!

Another observation is that if your t function is modified to pin bzip2
processes to CPUs (e.g. cpuset -l $((2 * i)) bzip2 ...), then the results are
much more consistent.  In fact, they match the best results from the original
test:
$ ~/test.sh 4         
1048576000 bytes transferred in 4.903489 secs (213842854 bytes/sec)
1048576000 bytes transferred in 4.904297 secs (213807597 bytes/sec)
1048576000 bytes transferred in 4.908786 secs (213612071 bytes/sec)
1048576000 bytes transferred in 4.915402 secs (213324567 bytes/sec)

-- 
You are receiving this mail because:
You are the assignee for the bug.