From: Daniel Phillips <phillips@bonn-fries.net>
To: Roger Larsson <roger.larsson@norran.net>, linux-mm@kvack.org
Cc: linux-kernel@vger.kernel.org
Subject: Re: [PATCH] MAX_READAHEAD gives doubled throuput
Date: Sat, 28 Jul 2001 04:08:17 +0200 [thread overview]
Message-ID: <0107280408170Z.00285@starship> (raw)
In-Reply-To: <200107280144.DAA25730@mailb.telia.com>
On Saturday 28 July 2001 03:40, Roger Larsson wrote:
> Hi all,
>
> Got wondering why simultaneous streaming is so much slower than
> normal...
>
> Are there any reasons nowadays why we should not attempt to read
> ahead more than 31 pages at once?
>
> 31 pages equals 0.1 MB, it is read from the HD in 4 ms => very close
> to the average access times. Resulting in a maximum of half the
> possible speed.
>
> With this patch copy and diff throughput are increased from 14
> respective 11 MB/s to 27 and 28 !!!
Wheeeeee! Out of interest, what are the numbers for 2.4.7 vs
2.4.8-pre1 ?
--
Daniel
--
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:[~2001-07-28 2:08 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2001-07-28 1:40 Roger Larsson
2001-07-28 2:08 ` Daniel Phillips [this message]
2001-07-28 2:29 ` Roger Larsson
2001-07-28 3:14 ` Andrew Morton
2001-07-28 9:07 ` Roger Larsson
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=0107280408170Z.00285@starship \
--to=phillips@bonn-fries.net \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-mm@kvack.org \
--cc=roger.larsson@norran.net \
/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