linux-kernel - Re: [PATCH 2/4] perf tools: allow user to specify hardware breakpoint bp

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Date:	Fri, 6 Jun 2014 11:30:10 -0500
From:	Suravee Suthikulanit <suravee.suthikulpanit@....com>
To:	Jiri Olsa <jolsa@...hat.com>, Namhyung Kim <namhyung@...il.com>
CC:	Frederic Weisbecker <fweisbec@...il.com>,
	LKML <linux-kernel@...r.kernel.org>,
	Jacob Shin <jacob.w.shin@...il.com>,
	Arnaldo Carvalho de Melo <acme@...stprotocols.net>,
	Ingo Molnar <mingo@...nel.org>,
	Oleg Nesterov <oleg@...hat.com>,
	Peter Zijlstra <peterz@...radead.org>,
	xiakaixu <xiakaixu@...wei.com>
Subject: Re: [PATCH 2/4] perf tools: allow user to specify hardware breakpoint
 bp_len

On 6/3/2014 6:55 AM, Jiri Olsa wrote:
> On Tue, Jun 03, 2014 at 10:36:22AM +0900, Namhyung Kim wrote:
>> Hi Jiri,
>>
>> On Fri, 30 May 2014 15:39:06 +0200, Jiri Olsa wrote:
>>> On Thu, May 29, 2014 at 05:26:51PM +0200, Frederic Weisbecker wrote:
>>>> From: Jacob Shin <jacob.w.shin@...il.com>
>>>>
>>>> Currently bp_len is given a default value of 4. Allow user to override it:
>>>>
>>>>    $ perf stat -e mem:0x1000/8
>>>>                              ^
>>>>                              bp_len
>>>>
>>>> If no value is given, it will default to 4 as it did before.
>>>
>>> Namhyung,
>>> both perf tols patches from this patchset mess up with hists
>>> tests..  I havent found any connection yet.. any idea? ;-)
>>
>> So you already found the problem in the hpp->elide change and that's the
>> reason of the failure, right? :)
>
> I haven't got a chance to test it yet.. but it looks like
> thats the case.. I'll retest soon ;-)
>
> jirka
>
Anything I can do to help here?

Thanks,

Suravee

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