From: Andrew Theurer <habanero@us.ibm.com>
To: linux-kernel@vger.kernel.org
Subject: Re: must-fix list, v5
Date: Wed, 21 May 2003 20:25:47 -0500 [thread overview]
Message-ID: <200305212025.47875.habanero@us.ibm.com> (raw)
In-Reply-To: <20030521152255.4aa32fba.akpm@digeo.com>
On Wednesday 21 May 2003 17:22, Andrew Morton wrote:
> +o Overeager affinity in presence of repeated yields
> +
> + http://www.hpl.hp.com/research/linux/kernel/o1-openmp.php
> +
> + ingo: this is valid. fix is in progress.
I have seen this with SpecJBB on high warehouse runs in around 2.5.66, I am
testing now to see if it still exists in 2.5.69. In 2.5.66 adding a bit to
try_to_wakeup to relocate p-task_cpu to an idle cpu (if available) if the
p->task_cpu is currently non idle helped dramatically. This change is also
in Andrea's 2.4 kernel tree I believe. Basically in some situations, a quick
push load balance before task activation.
Also, in this particular case, this behavior may go away with the use of
futexes in JVM, not sure yet, so I don't know if JVM and JBB are good
justifications to make this change.
-Andrew Theurer
next prev parent reply other threads:[~2003-05-22 1:06 UTC|newest]
Thread overview: 34+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-05-21 22:22 Andrew Morton
2003-05-21 22:23 ` Andrew Morton
2003-05-21 22:49 ` Tom Rini
2003-05-21 22:55 ` Andrew Morton
2003-05-26 9:37 ` Pavel Machek
2003-05-28 21:48 ` Andrew Morton
2003-05-28 21:55 ` Pavel Machek
2003-05-28 22:06 ` Andrew Morton
[not found] ` <20030528221812.GC255@elf.ucw.cz>
2003-05-28 22:46 ` Andrew Morton
2003-05-28 23:03 ` Pavel Machek
2003-05-29 11:13 ` Pavel Machek
2003-05-21 22:41 ` Andrew Morton
2003-05-22 1:03 ` Carl-Daniel Hailfinger
2003-05-22 3:08 ` oxymoron
2003-05-22 1:25 ` Andrew Theurer [this message]
2003-05-22 6:24 ` Jens Axboe
2003-05-25 21:05 ` Daniel Jacobowitz
2003-05-21 23:59 Arnd Bergmann
2003-05-22 8:16 Grover, Andrew
2003-05-22 8:31 ` Andrew Morton
2003-05-22 14:23 ` Jos Hulzink
[not found] <20030521152255.4aa32fba.akpm@digeo.com.suse.lists.linux.kernel>
[not found] ` <20030521152334.4b04c5c9.akpm@digeo.com.suse.lists.linux.kernel>
[not found] ` <20030526093717.GC642@zaurus.ucw.cz.suse.lists.linux.kernel>
[not found] ` <20030528144839.47efdc4f.akpm@digeo.com.suse.lists.linux.kernel>
[not found] ` <20030528215551.GB255@elf.ucw.cz.suse.lists.linux.kernel>
2003-05-29 9:17 ` Andi Kleen
2003-05-29 9:32 ` David S. Miller
2003-05-29 9:46 ` Pavel Machek
2003-05-29 10:01 ` David S. Miller
2003-05-29 10:03 ` Pavel Machek
2003-05-29 9:46 ` Andi Kleen
2003-05-29 10:01 ` David S. Miller
2003-05-29 11:25 ` Pavel Machek
2003-05-29 11:26 ` David S. Miller
2003-05-29 11:39 ` Arjan van de Ven
2003-05-29 20:10 ` Pavel Machek
2003-05-29 20:06 ` Pavel Machek
2003-05-29 21:15 ` David S. Miller
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=200305212025.47875.habanero@us.ibm.com \
--to=habanero@us.ibm.com \
--cc=linux-kernel@vger.kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox
all inboxes | Powered by JetHome®