From: David Ahern <dsahern@gmail.com>
To: zhao bao <baozhao@gmail.com>
Cc: linux-perf-users@vger.kernel.org
Subject: Re: Fwd: perf trace cannot work with software events ?
Date: Sat, 26 Mar 2011 08:23:32 -0600 [thread overview]
Message-ID: <4D8DF6E4.1070804@gmail.com> (raw)
In-Reply-To: <AANLkTiktVqjaaNRm7EaCTJMsYsQnKUWrekDqF4r7YW7=@mail.gmail.com>
On 03/26/11 08:00, zhao bao wrote:
> 2011/3/26 David Ahern <dsahern@gmail.com>:
>> On 03/26/11 06:31, zhao bao wrote:
>>>> It's used to trace kernel space page faults, not for userspace code.
>>>>
>>>> Lin Ming
>>>>
>>>
>>> From the ouput of "perf report" command, I think perf can record the
>>> page faults from userspace code.
>>>
>>> [root@localhost lab]# perf record -R -c 1 -d -e faults ./hello
>>> hello,world
>>
>> '-e faults' is a software event. perf-trace does not handle S/W events.
>> perf-trace has been renamed to perf-script, and perf-script recently
>> gained the ability to dump S/W events:
>>
>> https://lkml.org/lkml/2011/3/10/3
>>
>> David
>>
> Thanks. How can I apply your patch? May I need upgrade to 2.6.38?
You can compile latest perf userpsace and it should work with files from
older kernels.
David
next prev parent reply other threads:[~2011-03-26 14:23 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-03-26 8:04 perf trace cannot work with software events ? zhao bao
2011-03-26 9:28 ` Lin Ming
[not found] ` <AANLkTi=VrazJpV+dpzX2hWJ8dYDgbdo_5FAOMRYRo0GD@mail.gmail.com>
2011-03-26 12:31 ` Fwd: " zhao bao
2011-03-26 13:13 ` David Ahern
2011-03-26 14:00 ` zhao bao
2011-03-26 14:23 ` David Ahern [this message]
2011-03-26 16:13 ` zhao bao
2011-03-27 3:59 ` David Ahern
2011-03-27 7:44 ` zhao bao
2011-03-27 21:09 ` David Ahern
2011-03-29 15:48 ` zhao bao
2011-03-29 16:55 ` baozhao
2011-03-29 20:05 ` David Ahern
2011-04-18 3:43 ` perf trace Kumar Ranjit-B04060
2011-04-18 6:08 ` David Ahern
2011-04-18 6:38 ` Kumar Ranjit-B04060
2011-04-18 6:48 ` David Ahern
2011-04-18 17:46 ` Kumar Ranjit-B04060
2011-04-18 19:26 ` David Ahern
2011-03-29 17:07 ` Fwd: perf trace cannot work with software events ? zhao bao
2011-03-26 14:27 ` Lin Ming
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