From: David Ahern <dsahern@gmail.com>
To: Yipeng Huang <yipeng@gmail.com>
Cc: linux-perf-users@vger.kernel.org
Subject: Re: perf stat: Doubt about stall cycle support
Date: Wed, 21 Mar 2012 08:46:28 -0600 [thread overview]
Message-ID: <4F69E9C4.8060108@gmail.com> (raw)
In-Reply-To: <loom.20120321T054053-857@post.gmane.org>
On 3/20/12 10:42 PM, Yipeng Huang wrote:
> I am running perf stat to count hardware counters but am confused about stall
> cycle support.
>
> On running the command perf stat ./progname, I am told that stalled-cycles-
> frontend and stalled-cycles-backend are not counted, but when on running perf
> stat -v ./progname, I am told that stall cycles are not supported by the kernel.
> So which is it?
What does perf --version show?
Should be fixed by 2cee77c4505fc581f41b44e18ffc0953b67a414c.
David
next prev parent reply other threads:[~2012-03-21 14:46 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-03-21 4:42 perf stat: Doubt about stall cycle support Yipeng Huang
2012-03-21 14:46 ` David Ahern [this message]
[not found] ` <CAB_n8zK5b0jWA=retCX12DGmrb19gMd2UxJGWkn6HD9nFrdiAQ@mail.gmail.com>
2012-03-21 16:24 ` David Ahern
2012-03-22 0:43 ` Yipeng Huang
2012-03-22 1:17 ` Vince Weaver
2012-03-24 1:55 ` yipeng
2012-03-22 2:30 ` David Ahern
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