Messages in this thread |  | | Date | Wed, 7 Oct 2020 20:23:09 +0100 | From | Mel Gorman <> | Subject | Re: ACPI _CST introduced performance regresions on Haswll |
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On Wed, Oct 07, 2020 at 05:40:43PM +0200, Rafael J. Wysocki wrote: > > # grep . enable-cst/cpuidle/state*/disable > > enable-cst/cpuidle/state0/disable:0 > > enable-cst/cpuidle/state1/disable:0 > > enable-cst/cpuidle/state2/disable:0 > > enable-cst/cpuidle/state3/disable:1 > > enable-cst/cpuidle/state4/disable:1 > > # grep . enable-cst/cpuidle/state*/default_status > > enable-cst/cpuidle/state0/default_status:enabled > > enable-cst/cpuidle/state1/default_status:enabled > > enable-cst/cpuidle/state2/default_status:enabled > > enable-cst/cpuidle/state3/default_status:disabled > > enable-cst/cpuidle/state4/default_status:disabled > > > > That looks like C3 and C6 are disabled after the patch. > > > > # grep . enable-cst/cpuidle/state*/name > > enable-cst/cpuidle/state0/name:POLL > > enable-cst/cpuidle/state1/name:C1 > > enable-cst/cpuidle/state2/name:C1E > > enable-cst/cpuidle/state3/name:C3 > > enable-cst/cpuidle/state4/name:C6 > > > > That's kind of unexpected and there may be two reasons for that. > > First off, the MWAIT hints in the ACPI tables for C3 and C6 may be different > from the ones in the intel_idle internal table. > > Second, the ACPI tables may only be listing C1. > > Can you send me the acpidump output from the affected machine, please? >
Attached.
Thanks.
-- Mel Gorman SUSE Labs [unhandled content-type:application/x-xz] |  |