From: Con Kolivas <kernel@kolivas.org>
To: Phy Prabab <phyprabab@yahoo.com>
Cc: linux-kernel@vger.kernel.org
Subject: Re: slow down in 2.6 vs 2.4
Date: Wed, 9 Jun 2004 11:35:27 +1000 [thread overview]
Message-ID: <1086744927.40c6695f9c361@vds.kolivas.org> (raw)
Hi Phy
You said:
Over the last two days I have been struggling with
understanding why 2.6.x kernel is slower than
2.4.21/23 kernels. I think I have a test case which
demostrates this issue.
make times:
2.4.21:
323.68user 56.07system 6:35.77elapsed 95%CPU
(0avgtext+0avgdata 0maxresident)k
0inputs+0outputs (3138783major+3818347minor)pagefaults
0swaps
2.6.7-rc3-s63 (SPA scheduler):
334.01user 69.86system 7:01.47elapsed 95%CPU
(0avgtext+0avgdata 0maxresident)k
0inputs+0outputs (13301major+6931745minor)pagefaults
0swaps
2.6.7-rc3:
336.17user 68.41system 7:02.47elapsed 95%CPU
(0avgtext+0avgdata 0maxresident)k
0inputs+0outputs (13301major+6931745minor)pagefaults
0swaps
----
Your 2.4 compile is showing a massive number of major page faults. Just how big
is this compile you do? Can you try running the 2.6 compile with
echo 100 > /proc/sys/vm/swappiness
Con
next reply other threads:[~2004-06-09 3:58 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-06-09 1:35 Con Kolivas [this message]
2004-06-09 4:10 ` Phy Prabab
2004-06-09 19:34 ` Paul Dickson
2004-06-09 4:41 ` Peter Williams
2004-06-09 3:35 Phy Prabab
2004-06-09 19:16 ` Clint Byrum
2004-06-09 20:15 ` Bill Davidsen
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=1086744927.40c6695f9c361@vds.kolivas.org \
--to=kernel@kolivas.org \
--cc=linux-kernel@vger.kernel.org \
--cc=phyprabab@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®