linux-kernel - Re: [PATCH] perf stat: Ignore error thread when enabling system-wide --per-thread

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Date:   Tue, 27 Feb 2018 08:53:13 +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] perf stat: Ignore error thread when enabling system-wide
 --per-thread



On 1/23/2018 10:19 PM, Jiri Olsa wrote:
> On Mon, Jan 22, 2018 at 01:10:31PM +0800, Jin, Yao wrote:
>>
>>
>> On 1/16/2018 9:17 PM, Jiri Olsa wrote:
>>> On Tue, Jan 16, 2018 at 09:06:09PM +0800, Jin, Yao wrote:
>>>> Just tested. But looks it's not OK for '--per-thread' case.
>>>
>>> yea, I haven't tested much.. might need soem tweaking,
>>> but my point was that it could be doable on one place
>>> instead of introducing another if possible
>>>
>>> jirka
>>>
>>
>> Hi Jiri,
>>
>> I ever considered to move the operation of removing error thread to
>> perf_evsel__fallback(). The perf_evsel__fallback() is common code and it's
>> shared by perf report, perf stat and perf top.
>>
>> While finally I think it'd better let the caller decide to remove error
>> thread and try again, or just return the warning message.
>> perf_evsel__fallback() probably doesn't know what the caller want to do.
>>
>> That's my current thinking. Maybe there will be a better fix...
> 
> ok, can't think of better fix atm.. looks good ;-)
> 
> Acked-by: Jiri Olsa <jolsa@...nel.org>
> 
> thanks,
> jirka
> 

Hi Arnaldo,

Could this fix be accepted?

Thanks
Jin Yao