linux-kernel - Re: [PATCH v2 09/27] perf parse-events: Create two hybrid hardware events

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Date:   Fri, 12 Mar 2021 20:15:25 +0100
From:   Jiri Olsa <jolsa@...hat.com>
To:     Jin Yao <yao.jin@...ux.intel.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 v2 09/27] perf parse-events: Create two hybrid hardware
 events

On Thu, Mar 11, 2021 at 03:07:24PM +0800, Jin Yao wrote:

SNIP

>   cycles: 4: 800933425 1002536659 1002536659
>   cycles: 5: 800928573 1002528386 1002528386
>   cycles: 6: 800924347 1002520527 1002520527
>   cycles: 7: 800922009 1002513176 1002513176
>   cycles: 8: 800919624 1002507326 1002507326
>   cycles: 9: 800917204 1002500663 1002500663
>   cycles: 10: 802096579 1002494280 1002494280
>   cycles: 11: 802093770 1002486404 1002486404
>   cycles: 12: 803284338 1002479491 1002479491
>   cycles: 13: 803277609 1002469777 1002469777
>   cycles: 14: 800875902 1002458861 1002458861
>   cycles: 15: 800873241 1002451350 1002451350
>   cycles: 0: 800837379 1002444645 1002444645
>   cycles: 1: 800833400 1002438505 1002438505
>   cycles: 2: 800829291 1002433698 1002433698
>   cycles: 3: 800824390 1002427584 1002427584
>   cycles: 4: 800819360 1002422099 1002422099
>   cycles: 5: 800814787 1002415845 1002415845
>   cycles: 6: 800810125 1002410301 1002410301
>   cycles: 7: 800791893 1002386845 1002386845
>   cycles: 12855737722 16040169029 16040169029
>   cycles: 6406560625 8019379522 8019379522
> 
>    Performance counter stats for 'system wide':
> 
>       12,855,737,722      cpu_core/cycles/
>        6,406,560,625      cpu_atom/cycles/

so we do that no_merge stuff for uncore pmus, why can't we do
that in here? that'd seems like generic way

jirka