From: William Lee Irwin III <wli@holomorphy.com>
To: Peter Chubb <peter@chubb.wattle.id.au>
Cc: Robert Love <rml@tech9.net>,
Chris Friesen <cfriesen@nortelnetworks.com>,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>
Subject: Re: how to measure scheduler latency on powerpc? realfeel doesn't work due to /dev/rtc issues
Date: Sun, 11 May 2003 22:08:40 -0700 [thread overview]
Message-ID: <20030512050840.GM8978@holomorphy.com> (raw)
In-Reply-To: <16063.11081.433006.407544@wombat.chubb.wattle.id.au>
"William" == William Lee Irwin, <William> writes:
William> Not at all. Just stamp at wakeup and difference when it runs.
On Mon, May 12, 2003 at 03:04:09PM +1000, Peter Chubb wrote:
> That then doesn't include interrupt latency. The nice thing about the
> amlat tests is that the test predicts when the next interrupt should
> occur, then measures the time between that prediction and the process
> running in userspace. If you just timestamp at wakeup, you miss all
> the time between interrupt generation and noticing that the process is
> to wake up.
Of course. But that is not the scheduler's problem.
-- wli
next prev parent reply other threads:[~2003-05-12 4:56 UTC|newest]
Thread overview: 25+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <493798056@toto.iv>
2003-05-12 5:04 ` how to measure scheduler latency on powerpc? realfeel doesn't work due to /dev/rtc issues Peter Chubb
2003-05-12 5:08 ` William Lee Irwin III [this message]
2003-05-13 2:08 how to measure scheduler latency on powerpc? realfeel doesn' t " Perez-Gonzalez, Inaky
-- strict thread matches above, loose matches on Subject: below --
2003-05-13 0:20 Perez-Gonzalez, Inaky
2003-05-13 1:02 ` William Lee Irwin III
2003-05-10 0:39 Perez-Gonzalez, Inaky
2003-05-12 23:55 ` William Lee Irwin III
2003-05-08 22:12 how to measure scheduler latency on powerpc? realfeel doesn't " Chris Friesen
2003-05-09 0:13 ` William Lee Irwin III
2003-05-09 0:38 ` Davide Libenzi
2003-05-09 0:38 ` William Lee Irwin III
2003-05-09 0:56 ` Richard B. Johnson
2003-05-09 3:52 ` Chris Friesen
2003-05-09 4:13 ` Roland Dreier
2003-05-09 6:07 ` Chris Friesen
2003-05-09 4:26 ` William Lee Irwin III
2003-05-09 6:14 ` Chris Friesen
2003-05-09 6:20 ` William Lee Irwin III
2003-05-09 6:53 ` Chris Friesen
2003-05-09 7:01 ` William Lee Irwin III
2003-05-09 16:47 ` Robert Love
2003-05-09 16:53 ` William Lee Irwin III
2003-05-09 17:38 ` Chris Friesen
2003-05-09 11:37 ` paubert
2003-05-09 8:23 ` mikpe
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