From: warudkar@vsnl.net
To: kernel@kolivas.org, wli@holomorphy.com, linux-kernel@vger.kernel.org
Cc: Andrew Morton <akpm@osdl.org>
Date: Wed, 27 Aug 2003 21:25:23 -0500 (GMT) [thread overview]
raw)
Con - With swappiness set to 100, the apps do start up in 3 minutes and kswapd doesn't hog the CPU. But X is still unusable till all of them have started up.
Wli - Sorry, vmstat segfaults on 2.6!
kernel@kolivas.org wrote
On Thu, 28 Aug 2003 07:38, warudkar@vsnl.net wrote:
> Trying out 2.6.0-test4-mm1. Inside KDE, I start OpenOffice.org, Rational
> Rose and Konsole at a time. All of these take extremely long time to
> startup. (approx > 5 minutes). Kswapd hogs the CPU all the time. X becomes
> unusable till all of them startup, although I can telnet and run top. Same
> thing run under 2.4.18 starts up in 3 minutes, X stays usable and kswapd
> never take more than 2% CPU.
Yes I can reproduce this with a memory heavy load as well on low memory
(linking at the end of a big kernel compile is standard problem). I actually
found the best workaround was to increase the swappiness instead of
decreasing it.
Try
echo 100 > /proc/sys/vm/swappiness
time it
then try
echo 0 > /proc/sys/vm/swappiness
you'll see that at low swappiness kswapd0 can use ridiculous amounts of cpu
trying to avoid swap. The default is 60.
Con
next reply other threads:[~2003-08-27 15:53 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-08-28 2:25 warudkar [this message]
2003-08-27 16:02 ` your mail William Lee Irwin III
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