From: William Lee Irwin III <wli@holomorphy.com>
To: Chris Friesen <cfriesen@nortelnetworks.com>
Cc: Davide Libenzi <davidel@xmailserver.org>,
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: Thu, 8 May 2003 23:20:08 -0700 [thread overview]
Message-ID: <20030509062008.GT8978@holomorphy.com> (raw)
In-Reply-To: <3EBB4735.30701@nortelnetworks.com>
William Lee Irwin III wrote:
>> Try the timebase instead.
On Fri, May 09, 2003 at 02:14:13AM -0400, Chris Friesen wrote:
> The timestamp is not hard to get. The problem is getting a
> medium-frequency (2KHz or so) hardware interrupt to drive the test.
> On intel, you can do this by programming /dev/rtc. This does not work in
> powerpc.
I don't understand why you're obsessed with interrupts. Just run your
load and spray the scheduler latency stats out /proc/
-- wli
next prev parent reply other threads:[~2003-05-09 6:07 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-05-08 22:12 how to measure scheduler latency on powerpc? realfeel doesn't work due to /dev/rtc issues 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 [this message]
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
2003-05-09 8:17 ` how to measure scheduler latency on powerpc? realfeel doesn Giuliano Pochini
-- strict thread matches above, loose matches on Subject: below --
2003-05-10 0:39 how to measure scheduler latency on powerpc? realfeel doesn' t work due to /dev/rtc issues Perez-Gonzalez, Inaky
2003-05-12 23:55 ` William Lee Irwin III
[not found] <493798056@toto.iv>
2003-05-12 5:04 ` how to measure scheduler latency on powerpc? realfeel doesn't " Peter Chubb
2003-05-12 5:08 ` William Lee Irwin III
2003-05-13 0:20 how to measure scheduler latency on powerpc? realfeel doesn' t " Perez-Gonzalez, Inaky
2003-05-13 1:02 ` William Lee Irwin III
2003-05-13 2:08 Perez-Gonzalez, Inaky
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