From: David Ahern <dsahern@gmail.com>
To: Kumar Ranjit-B04060 <B04060@freescale.com>
Cc: "linux-perf-users@vger.kernel.org" <linux-perf-users@vger.kernel.org>
Subject: Re: perf trace
Date: Mon, 18 Apr 2011 13:26:28 -0600 [thread overview]
Message-ID: <4DAC9064.30604@gmail.com> (raw)
In-Reply-To: <8CB5FB7FBAFD274A8E92A53BBAFE339D0BB323@039-SN1MPN1-003.039d.mgd.msft.net>
On 04/18/11 11:46, Kumar Ranjit-B04060 wrote:
> David
>
>
> > meaning periodic samples of the counter? perf-record does not generate periodic reads of H/W counters.
>
> Just curious, How does then the profiling works? Perf report shows % no of sample point corresponding a particular event. So it must be sampling the PC periodically.
> Regards
> Ranjit
With H/W counters the values of the counters are not read when samples
are created.
David
next prev parent reply other threads:[~2011-04-18 19:26 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
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 [this message]
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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