Messages in this thread | | | From | Len Brown <> | Date | Mon, 24 May 2021 13:32:58 -0400 | Subject | Re: [PATCH v5 28/28] x86/fpu/amx: Clear the AMX state when appropriate |
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On Mon, May 24, 2021 at 10:10 AM Dave Hansen <dave.hansen@intel.com> wrote:
> On 5/23/21 8:13 PM, Andy Lutomirski wrote: > > > > Can we do this just when going idle? > > Chang, you might also want to talk with folks that do scheduler > performance work (I've cc'd Tim). I know we're always fighting to trim > down the idle and wakeup paths. There might be no other alternative, > but unconditionally forcing an AMX XRSTOR on return from idle might be > considered nasty.
I'm not excited about burdening the generic idle path with a CPU feature specific check that would need to be checked on every idle entry.
thanks, Len Brown, Intel Open Source Technology Center
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