From: Dave Jones <davej@codemonkey.org.uk>
To: Andrew Morton <akpm@digeo.com>
Cc: William Lee Irwin III <wli@holomorphy.com>,
Bill Davidsen <davidsen@tmr.com>,
Aaron Lehmann <aaronl@vitelus.com>,
Con Kolivas <conman@kolivas.net>,
linux kernel mailing list <linux-kernel@vger.kernel.org>
Subject: Re: [BENCHMARK] 2.5.47{-mm1} with contest
Date: Thu, 21 Nov 2002 13:20:14 +0000 [thread overview]
Message-ID: <20021121132014.GC9883@suse.de> (raw)
In-Reply-To: <3DDC8330.FE066815@digeo.com>
On Wed, Nov 20, 2002 at 10:54:40PM -0800, Andrew Morton wrote:
> > I think this merits some investigation. I, for one, am a big user of
> > SIGIO in userspace C programs...
> OK, got it back to 119000. Each signal was calling copy_*_user 24 times.
> This gets it down to six.
Good eyes. But.. this also applies to 2.4 (which should also then
get faster). So the gap between 2.4 & 2.5 must be somewhere else ?
Also maybe we can do something about that multiple memcpy in copy_fpu_fxsave()
In fact, that looks a bit fishy. We copy 10 bytes each memcpy, but
advance the to ptr 5 bytes each iteration. What gives here ?
Dave
--
| Dave Jones. http://www.codemonkey.org.uk
| SuSE Labs
next prev parent reply other threads:[~2002-11-21 13:15 UTC|newest]
Thread overview: 25+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-11-11 23:31 [BENCHMARK] 2.5.47{-mm1} with contest Con Kolivas
2002-11-12 0:09 ` Andrew Morton
2002-11-12 1:51 ` Con Kolivas
2002-11-12 2:07 ` mark walters
2002-11-12 2:18 ` Con Kolivas
2002-11-12 8:52 ` Giuliano Pochini
2002-11-12 9:20 ` Jens Axboe
2002-11-12 9:40 ` Con Kolivas
2002-11-12 3:04 ` Aaron Lehmann
2002-11-12 11:04 ` Andrew Morton
2002-11-12 14:20 ` Aaron Lehmann
2002-11-12 14:23 ` Jens Axboe
2002-11-12 20:37 ` Bill Davidsen
2002-11-12 20:59 ` Andrew Morton
2002-11-20 23:02 ` Andrew Morton
2002-11-21 0:08 ` William Lee Irwin III
2002-11-21 1:11 ` Alan Cox
2002-11-21 6:54 ` Andrew Morton
2002-11-21 13:20 ` Dave Jones [this message]
2002-11-21 17:21 ` Andrew Morton
2002-11-21 17:26 ` William Lee Irwin III
2002-11-21 18:18 ` Dave Jones
2002-11-21 18:25 ` Bill Davidsen
2002-11-21 14:00 ` Dave Jones
2002-11-21 19:59 ` Denis Vlasenko
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=20021121132014.GC9883@suse.de \
--to=davej@codemonkey.org.uk \
--cc=aaronl@vitelus.com \
--cc=akpm@digeo.com \
--cc=conman@kolivas.net \
--cc=davidsen@tmr.com \
--cc=linux-kernel@vger.kernel.org \
--cc=wli@holomorphy.com \
/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 an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.