Re: [PATCH v2 8/9] perf/x86/intel: Shadow MSR_ARCH_PERFMON_FIXED_CTR_CTRL

[Peter Zijlstra]

On Wed, Aug 31, 2022 at 09:52:19AM -0400, Liang, Kan wrote:
> 
> 
> On 2022-08-29 6:10 a.m., Peter Zijlstra wrote:
> > Less RDMSR is more better.
> 
> I had an RFC patch which does a further step to move the fixed
> control register write to right before the entire PMU re-enabling, which
> could also save some writes if there are several fixed counters enabled.
> https://lore.kernel.org/lkml/20220804140729.2951259-1-kan.liang@xxxxxxxxxxxxxxx/
> 
> Do you have any comments for the RFC patch?
> 

Oh, I like that better, let me just replace my patch with that.