| Date | Tue, 05 May 2015 12:15:00 -0700 | From | Dave Hansen <> | Subject | Re: [PATCH 207/208] x86/fpu: Add FPU performance measurement subsystem |
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On 05/05/2015 10:58 AM, Ingo Molnar wrote: > x86/fpu: Cost of: XSAVE insn : 104 cycles > x86/fpu: Cost of: XRSTOR insn : 80 cycles
Isn't there going to be pretty huge variability here depending on how much state you are xsave/xrstor'ing and if the init/modified optimizations are in play?
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