From: Andrew Morton <akpm@osdl.org>
To: David Lang <dlang@digitalinsight.com>
Cc: kenneth.w.chen@intel.com, linux-kernel@vger.kernel.org, axboe@suse.de
Subject: Re: Direct io on block device has performance regression on 2.6.x kernel
Date: Wed, 9 Mar 2005 20:10:22 -0800 [thread overview]
Message-ID: <20050309201022.7302d2ac.akpm@osdl.org> (raw)
In-Reply-To: <Pine.LNX.4.62.0503092000210.4446@qynat.qvtvafvgr.pbz>
David Lang <dlang@digitalinsight.com> wrote:
>
> (I've seen a 50%
> performance hit on 2.4 with just a thousand or two threads compared to
> 2.6)
Was that 2.4 kernel a vendor kernel with the O(1) scheduler?
next prev parent reply other threads:[~2005-03-10 4:12 UTC|newest]
Thread overview: 29+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-03-09 1:39 Direct io on block device has performance regression on 2.6.x kernel Chen, Kenneth W
2005-03-09 6:27 ` Andrew Morton
2005-03-09 17:21 ` Chen, Kenneth W
2005-03-09 20:04 ` Andrew Morton
2005-03-09 21:59 ` Chen, Kenneth W
2005-03-09 22:44 ` Andrew Morton
2005-03-10 1:11 ` Chen, Kenneth W
2005-03-10 1:33 ` Andrew Morton
2005-03-10 1:44 ` Chen, Kenneth W
2005-03-10 2:25 ` Andrew Morton
2005-03-10 3:47 ` Chen, Kenneth W
2005-03-10 4:04 ` David Lang
2005-03-10 4:10 ` Andrew Morton [this message]
2005-03-10 4:15 ` Direct io on block device has performance regression on 2.6.xkernel David Lang
2005-03-10 4:09 ` Direct io on block device has performance regression on 2.6.x kernel Andrew Morton
2005-03-10 18:31 ` Chen, Kenneth W
2005-03-10 20:30 ` Andrew Morton
2005-03-10 21:42 ` Chen, Kenneth W
2005-03-10 22:01 ` Andrew Morton
2005-03-10 4:28 ` Andrew Vasquez
-- strict thread matches above, loose matches on Subject: below --
2005-03-09 1:53 Chen, Kenneth W
2005-03-09 22:18 Chen, Kenneth W
2005-03-09 23:23 ` Andi Kleen
2005-03-09 23:52 ` Jesse Barnes
2005-03-09 23:52 ` Jesse Barnes
2005-03-10 1:00 ` Chen, Kenneth W
2005-03-10 0:57 ` Chen, Kenneth W
2005-03-10 1:24 Chen, Kenneth W
2005-03-10 2:04 Chen, Kenneth W
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=20050309201022.7302d2ac.akpm@osdl.org \
--to=akpm@osdl.org \
--cc=axboe@suse.de \
--cc=dlang@digitalinsight.com \
--cc=kenneth.w.chen@intel.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