From: Trond Myklebust <trond.myklebust@fys.uio.no>
To: Kenny Simpson <theonetruekenny@yahoo.com>
Cc: linux-kernel@vger.kernel.org
Subject: re: mmap over nfs leads to excessive system load
Date: Tue, 08 Nov 2005 12:01:47 -0800 [thread overview]
Message-ID: <1131480107.32482.48.camel@lade.trondhjem.org> (raw)
In-Reply-To: <20051108192515.17247.qmail@web34105.mail.mud.yahoo.com>
On Tue, 2005-11-08 at 11:25 -0800, Kenny Simpson wrote:
> Just another data point....
> If I open the file with O_DIRECT.. not much changes:
Hmm... Are you mounting using the -osync or -onoac options? Doing
synchronous writes will tend to slow down flushing considerably, and the
VM appears to be very fragile w.r.t. slow filesystems.
Cheers,
Trond
> samples % image name app name symbol name
> 12585321 18.9373 vmlinux-2.6.14 vmlinux-2.6.14 find_get_pages_tag
> 8608887 12.9539 vmlinux-2.6.14 vmlinux-2.6.14 mpage_writepages
> 6870600 10.3383 vmlinux-2.6.14 vmlinux-2.6.14 unlock_page
> 6605417 9.9393 vmlinux-2.6.14 vmlinux-2.6.14 clear_page_dirty_for_io
> 6259207 9.4183 vmlinux-2.6.14 vmlinux-2.6.14 release_pages
> 3249493 4.8896 vmlinux-2.6.14 vmlinux-2.6.14 __lookup_tag
> 3248871 4.8886 vmlinux-2.6.14 vmlinux-2.6.14 pci_conf1_write
> 2677914 4.0295 vmlinux-2.6.14 vmlinux-2.6.14 page_waitqueue
> 982811 1.4789 vmlinux-2.6.14 vmlinux-2.6.14 _read_lock_irqsave
> 917165 1.3801 vmlinux-2.6.14 vmlinux-2.6.14 _read_unlock_irq
> 758960 1.1420 vmlinux-2.6.14 vmlinux-2.6.14 __wake_up_bit
> 706607 1.0632 vmlinux-2.6.14 vmlinux-2.6.14 _spin_lock_irqsave
>
>
> -Kenny
>
>
>
>
>
> __________________________________
> Yahoo! Mail - PC Magazine Editors' Choice 2005
> http://mail.yahoo.com
> -
> To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
> the body of a message to majordomo@vger.kernel.org
> More majordomo info at http://vger.kernel.org/majordomo-info.html
> Please read the FAQ at http://www.tux.org/lkml/
next prev parent reply other threads:[~2005-11-08 20:01 UTC|newest]
Thread overview: 53+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-11-08 19:25 Kenny Simpson
2005-11-08 20:01 ` Trond Myklebust [this message]
2005-11-08 20:18 ` Kenny Simpson
2005-11-08 20:57 ` Kenny Simpson
[not found] <20051115224645.27832.qmail@web34103.mail.mud.yahoo.com>
2005-11-15 23:47 ` Kenny Simpson
2005-11-16 4:31 ` William Lee Irwin III
2005-11-16 6:05 ` Kenny Simpson
2005-11-16 7:45 ` Andrew Morton
2005-11-16 14:03 ` Trond Myklebust
2005-11-16 15:01 ` Kenny Simpson
2005-11-16 17:44 ` Trond Myklebust
2005-11-16 18:00 ` Andrew Morton
2005-11-16 18:34 ` Trond Myklebust
2005-11-16 18:38 ` Christoph Hellwig
2005-11-17 13:08 ` Nikita Danilov
2005-11-16 19:09 ` Andrew Morton
2005-11-16 20:05 ` Trond Myklebust
2005-11-16 20:56 ` Kenny Simpson
2005-11-16 21:02 ` Kenny Simpson
2005-11-16 21:09 ` Trond Myklebust
2005-11-16 21:17 ` Kenny Simpson
2005-11-16 21:41 ` Kenny Simpson
2005-11-16 21:57 ` Trond Myklebust
2005-11-16 22:04 ` Kenny Simpson
2005-11-16 22:39 ` Kenny Simpson
2005-11-16 23:06 ` Trond Myklebust
2005-11-17 15:40 ` Chuck Lever
2005-11-17 16:56 ` Kenny Simpson
2005-11-17 16:01 ` Kenny Simpson
2005-11-17 21:04 ` Andrew Morton
2005-11-17 21:15 ` Kenny Simpson
2005-11-18 16:55 ` Kenny Simpson
2005-11-18 17:26 ` Kenny Simpson
2005-11-18 21:57 ` Kenny Simpson
2005-11-17 17:02 ` Chuck Lever
2005-11-17 17:07 ` Trond Myklebust
2005-11-18 19:59 ` Kenny Simpson
2005-11-16 21:31 ` Andrew Morton
2005-11-16 21:49 ` Trond Myklebust
2005-11-16 22:10 ` Andrew Morton
2005-11-16 22:23 ` Trond Myklebust
2005-11-16 22:38 ` Trond Myklebust
2005-11-16 22:50 ` Andrew Morton
2005-11-16 22:44 ` Andrew Morton
2005-11-16 23:10 ` Trond Myklebust
2005-11-17 0:06 ` Trond Myklebust
2005-11-17 0:25 ` Andrew Morton
2005-11-17 0:28 ` Trond Myklebust
2005-11-17 0:38 ` Andrew Morton
2005-11-17 0:47 ` Trond Myklebust
2005-11-16 18:48 ` Kenny Simpson
2005-11-16 19:06 ` Kenny Simpson
-- strict thread matches above, loose matches on Subject: below --
2005-11-08 18:47 Kenny Simpson
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=1131480107.32482.48.camel@lade.trondhjem.org \
--to=trond.myklebust@fys.uio.no \
--cc=linux-kernel@vger.kernel.org \
--cc=theonetruekenny@yahoo.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 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®