From: Nick Piggin <piggin@cyberone.com.au>
To: Linus Torvalds <torvalds@osdl.org>, Andrew Morton <akpm@osdl.org>
Cc: linux-kernel <linux-kernel@vger.kernel.org>
Subject: lmbench context switch regression
Date: Wed, 05 Nov 2003 23:28:32 +1100 [thread overview]
Message-ID: <3FA8ECF0.8020800@cyberone.com.au> (raw)
Hi,
I'm seeing quite a large context switch speed regression as reported
by lmbench when I patched from test9 to test9-mm2.
The obvious thing I can see from the patch is the PF_DEAD finish_task_switch
change. I don't have time to investigate further tonight though.
lmbench two 0 sized processes context switch times go from around 1.80us to
2.60us on my PIII 650 (UP).
next reply other threads:[~2003-11-05 12:28 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-11-05 12:28 Nick Piggin [this message]
2003-11-05 23:16 ` lmbench context switch regression Nick Piggin
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=3FA8ECF0.8020800@cyberone.com.au \
--to=piggin@cyberone.com.au \
--cc=akpm@osdl.org \
--cc=linux-kernel@vger.kernel.org \
--cc=torvalds@osdl.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;
as well as URLs for NNTP newsgroup(s).