Re: [PATCH v2 1/7] perf/x86/core: Update x86_pmu.pebs_capable for ICELAKE_{X,D}

Peter Zijlstra
2022-08-15T13:15:19Z

On Mon, Aug 15, 2022 at 08:48:36PM +0800, Like Xu wrote:

> In the SDM world, we actually have three PEBS sub-features:
>
> [July 2017] 18.5.4.1 Extended PEBS (first on Goldmont Plus)
> [January 2019] 18.9.2 Adaptive PEBS (first on Tremont)
> [April 2021] IA32_PERF_CAPABILITIES.PEBS_BASELINE in the Table 2-2. IA-32
> Architectural MSRs
>
> Waiting Kan to confirm the real world.

Right, so it's possible GLM would need the FMS thing, but AFAIK ICX
has Baseline and therefore shouldn't need it.