Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67;
Subject: Re: [PATCH] perf stat: Show percore counts in per CPU output
To:     Jiri Olsa <jolsa@redhat.com>, Andi Kleen <ak@linux.intel.com>
Cc:     acme@kernel.org, jolsa@kernel.org, peterz@infradead.org,
        mingo@redhat.com, alexander.shishkin@linux.intel.com,
        Linux-kernel@vger.kernel.org, kan.liang@intel.com,
        yao.jin@intel.com
References: <20200206015613.527-1-yao.jin@linux.intel.com>
 <20200210132804.GA9922@krava>
 <f749694f-b3b3-c498-74ea-ec2e6bb0d0f1@linux.intel.com>
 <20200210140120.GD9922@krava> <20200210170159.GV302770@tassilo.jf.intel.com>
 <20200210210419.GD36715@krava>
From:   "Jin, Yao" <yao.jin@linux.intel.com>
Message-ID: <d1eb5ce7-8c2c-3f15-5218-67de334897a6@linux.intel.com>
Date:   Tue, 11 Feb 2020 09:48:58 +0800
User-Agent: Mozilla/5.0 (Windows NT 10.0; WOW64; rv:68.0) Gecko/20100101
 Thunderbird/68.4.2
MIME-Version: 1.0
In-Reply-To: <20200210210419.GD36715@krava>
Content-Type: text/plain; charset=utf-8; format=flowed
Content-Language: en-US
Content-Transfer-Encoding: 7bit
Sender: linux-kernel-owner@vger.kernel.org
Precedence: bulk


On 2/11/2020 5:04 AM, Jiri Olsa wrote:
> On Mon, Feb 10, 2020 at 09:01:59AM -0800, Andi Kleen wrote:
>>>> With --percore-show-thread, CPU0 and CPU4 have the same counts (CPU0 and
>>>> CPU4 are siblings, e.g. 2,453,061 in my example). The value is sum of CPU0 +
>>>> CPU4.
>>>
>>> so it shows percore stats but displays all the cpus? what is this good for?
>>
>> This is essentially a replacement for the any bit (which is gone in Icelake).
>> Per core counts are useful for some formulas, e.g. CoreIPC
>>
>> The original percore version was inconvenient to post process. This
>> variant matches the output of the any bit.
> 
> I see, please put this to the changelog/doc
> 
> thanks,
> jirka
> 

Thanks Jiri, thanks Andi!

I will put the explanation in v2.

Thanks
Jin Yao