linux-kernel - Re: [PATCH v4 0/2] perf header: Support HYBRID_TOPOLOGY and HYBRID_CPU_PMU

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Date:   Tue, 18 May 2021 09:40:41 +0800
From:   "Jin, Yao" <yao.jin@...ux.intel.com>
To:     Jiri Olsa <jolsa@...hat.com>
Cc:     acme@...nel.org, jolsa@...nel.org, peterz@...radead.org,
        mingo@...hat.com, alexander.shishkin@...ux.intel.com,
        Linux-kernel@...r.kernel.org, ak@...ux.intel.com,
        kan.liang@...el.com, yao.jin@...el.com
Subject: Re: [PATCH v4 0/2] perf header: Support HYBRID_TOPOLOGY and
 HYBRID_CPU_PMU_CAPS

Hi Jiri,

On 5/16/2021 5:18 AM, Jiri Olsa wrote:
> On Fri, May 14, 2021 at 08:29:46PM +0800, Jin Yao wrote:
>> AlderLake uses a hybrid architecture utilizing Golden Cove cores
>> (core cpu) and Gracemont cores (atom cpu). It would be useful to let user
>> know the hybrid topology, the HYBRID_TOPOLOGY feature in header indicates
>> which cpus are core cpus, and which cpus are atom cpus.
>>
>> On hybrid platform, it may have several cpu pmus, such as, "cpu_core" and
>> "cpu_atom". The HYBRID_CPU_PMU_CAPS feature in perf header is created to
>> support multiple cpu pmus.
>>
>> v4:
>> ---
>> - Only minor update in '[PATCH v4 2/2] perf header: Support HYBRID_CPU_PMU_CAPS feature'.
>>    1. Directly return process_per_cpu_pmu_caps() in process_cpu_pmu_caps.
>>       Remove the variable 'ret'.
>>    2. Set 'ret = -1' if (!n->pmu_name) in process_hybrid_cpu_pmu_caps().
> Acked-by: Jiri Olsa<jolsa@...hat.com>
> 
> thanks,
> jirka
> 

Thanks so much!

I have some followup patches which depend on this patchset. I will post them after this patchset is 
applied.

Thanks
Jin Yao