Messages in this thread | | | Date | Thu, 6 Aug 2020 15:34:52 +0200 | From | Ingo Molnar <> | Subject | Re: [x86/copy_mc] a0ac629ebe: fio.read_iops -43.3% regression |
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* kernel test robot <rong.a.chen@intel.com> wrote:
> Greeting, > > FYI, we noticed a -43.3% regression of fio.read_iops due to commit: > > > commit: a0ac629ebe7b3d248cb93807782a00d9142fdb98 ("x86/copy_mc: Introduce copy_mc_generic()") > url: https://github.com/0day-ci/linux/commits/Dan-Williams/Renovate-memcpy_mcsafe-with-copy_mc_to_-user-kernel/20200802-014046 > > > in testcase: fio-basic > on test machine: 96 threads Intel(R) Xeon(R) Gold 6252 CPU @ 2.10GHz with 256G memory > with following parameters:
So this performance regression, if it isn't a spurious result, looks concerning. Is this expected?
Thanks,
Ingo
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