Messages in this thread | | | Date | Wed, 12 Feb 2020 13:18:30 +0100 | From | Peter Zijlstra <> | Subject | Re: [perf/x86/amd] 471af006a7: will-it-scale.per_process_ops -7.6% regression |
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On Wed, Feb 12, 2020 at 07:35:14PM +0800, kernel test robot wrote: > Greeting, > > FYI, we noticed a -7.6% regression of will-it-scale.per_process_ops due to commit: > > > commit: 471af006a747f1c535c8a8c6c0973c320fe01b22 ("perf/x86/amd: Constrain Large Increment per Cycle events") > https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git master > > in testcase: will-it-scale > on test machine: 88 threads Intel(R) Xeon(R) CPU E5-2699 v4 @ 2.20GHz with 128G memory
That commit only changes code relevant to AMD machines; give you have this result on an Intel machine makes me think the bisect is flawed.
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