linux-kernel - Re: [PATCH v4 0/9] perf, x86: large PEBS interrupt threshold

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Message-ID: <53D9EDB5.6020304@intel.com>
Date:	Thu, 31 Jul 2014 15:18:13 +0800
From:	"Yan, Zheng" <zheng.z.yan@...el.com>
To:	Ingo Molnar <mingo@...nel.org>
CC:	linux-kernel@...r.kernel.org, a.p.zijlstra@...llo.nl,
	acme@...radead.org, eranian@...gle.com, andi@...stfloor.org,
	Jiri Olsa <jolsa@...hat.com>
Subject: Re: [PATCH v4 0/9] perf, x86: large PEBS interrupt threshold

On 07/31/2014 03:16 PM, Ingo Molnar wrote:
> 
> * Yan, Zheng <zheng.z.yan@...el.com> wrote:
> 
>> This patch series implements large PEBS interrupt threshold. For some
>> limited cases, it can significantly reduce the sample overhead. Please
>> read patch 6's commit message for more information.
>>
>> changes since v1:
>>   - drop patch 'perf, core: Add all PMUs to pmu_idr'
>>   - add comments for case that multiple counters overflow simultaneously
>> changes since v2:
>>   - rename perf_sched_cb_{enable,disable} to perf_sched_cb_user_{inc,dec} 
>>   - use flag to indicate auto reload mechanism
>>   - move codes that setup PEBS sample data to separate function
>>   - output the PEBS records in batch 
>>   - enable this for All (PEBS capable) hardware 
>>   - more description for the multiplex
>> changes since v3:
>>   - ignore conflicting PEBS record
> 
> Please include performance measurements, 'significantly reduces sample 
> overhead' is a totally inadequate description to judge this patch set.

patch 6 contains performance data.

> 
> Please also include total diffstat in the 0/N mail.
> 

will do.

Regards
Yan, Zheng

> Thanks,
> 
> 	Ingo
> 

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