linux-kernel - Re: [PATCH v4] perf diff: Report noisy for cycles diff

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Date:   Fri, 16 Aug 2019 09:24:51 +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] perf diff: Report noisy for cycles diff



On 8/15/2019 9:23 PM, Jiri Olsa wrote:
> On Tue, Aug 13, 2019 at 03:30:37PM +0800, Jin Yao wrote:
>> This patch prints the stddev and hist for the cycles diff of
>> program block. It can help us to understand if the cycles
>> is noisy or not.
>>
>> This patch is inspired by Andi Kleen's patch
>> https://lwn.net/Articles/600471/
> 
> now that we have sparks support, we could respin it ;-)
> 
> jirka
> 

The sparks can be used in more places for reporting the data noisy. :)

Thanks
Jin Yao