From: William Lee Irwin III <wli@holomorphy.com>
To: Andrew Morton <akpm@digeo.com>
Cc: Dave McCracken <dmccr@us.ibm.com>, linux-mm@kvack.org
Subject: Re: shared pagetable benchmarking
Date: Fri, 20 Dec 2002 03:13:36 -0800 [thread overview]
Message-ID: <20021220111336.GH25000@holomorphy.com> (raw)
In-Reply-To: <3E02FACD.5B300794@digeo.com>
On Fri, Dec 20, 2002 at 03:11:09AM -0800, Andrew Morton wrote:
> Did a bit of timing and profiling. It's a uniprocessor
> kernel, 7G, PAE.
> The workload is application and removal of ~80 patches using
> my patch scripts. Tons and tons of forks from bash.
> 2.5 ends up being 13% slower than 2.4, after disabling highpte
> to make it fair. 3%-odd of this is HZ=1000. So say 10%.
> Pagetable sharing actually slowed this test down by several
> percent overall. Which is unfortunate, because the main
> thing which Linus likes about shared pagetables is that it
> "speeds up forks".
> Is there anything we can do to fix all of this up a bit?
For testing purposes, try removing the opportunistic mmap()-time
sharing.
Bill
--
To unsubscribe, send a message with 'unsubscribe linux-mm' in
the body to majordomo@kvack.org. For more info on Linux MM,
see: http://www.linux-mm.org/
next prev parent reply other threads:[~2002-12-20 11:13 UTC|newest]
Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-12-20 11:11 shared pagetable benchmarking Andrew Morton
2002-12-20 11:13 ` William Lee Irwin III [this message]
2002-12-20 16:30 ` Dave McCracken
2002-12-20 19:59 ` Andrew Morton
2002-12-23 16:15 ` Dave McCracken
2002-12-23 23:54 ` Andrew Morton
2002-12-27 9:39 ` Daniel Phillips
2002-12-27 9:58 ` Andrew Morton
2002-12-27 15:59 ` Daniel Phillips
2002-12-27 20:02 ` Linus Torvalds
2002-12-27 20:16 ` Dave McCracken
2002-12-27 20:18 ` Linus Torvalds
2002-12-27 20:45 ` Dave McCracken
2002-12-27 20:50 ` Linus Torvalds
2002-12-27 23:56 ` Daniel Phillips
2002-12-28 0:45 ` Martin J. Bligh
2002-12-28 2:34 ` Andrew Morton
2002-12-28 3:10 ` Linus Torvalds
2002-12-28 6:58 ` Andrew Morton
2002-12-28 7:39 ` Ingo Molnar
2002-12-28 7:47 ` Linus Torvalds
2002-12-28 23:28 ` Andrew Morton
2002-12-28 3:19 ` Martin J. Bligh
2002-12-23 18:19 ` Dave McCracken
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=20021220111336.GH25000@holomorphy.com \
--to=wli@holomorphy.com \
--cc=akpm@digeo.com \
--cc=dmccr@us.ibm.com \
--cc=linux-mm@kvack.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 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.