Date: Tue, 21 Dec 2021 10:49:12 +0000 From: bugzilla-noreply@freebsd.org To: bugs@FreeBSD.org Subject: [Bug 254040] AMD 5950X hyperthreading strange performance swings Message-ID: <bug-254040-227-y7IIIElRFW@https.bugs.freebsd.org/bugzilla/> In-Reply-To: <bug-254040-227@https.bugs.freebsd.org/bugzilla/>
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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.home | help
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