Re: [ANNOUNCE] RSDL completely fair starvation free interactive cpu scheduler
From: Simon Arlott
Date: Mon Mar 05 2007 - 13:29:25 EST
On 04/03/07 22:27, Con Kolivas wrote:
On Monday 05 March 2007 09:19, Simon Arlott wrote:
If I run glxgears, thunderbird/firefox become really slow to
respond/display and cpu usage isn't even at 100%. I had thunderbird lagging
on keyboard character repeat earlier but can't reproduce that now even with
glxgears - however firefox lags really badly on keyboard input with
glxgears running.
Hi Simon
You're hitting a nasty udev bug here that is unrelated to the cpu scheduler
Yes, I've already reported this.
and almost certainly responsible for your bad behaviour.
What? How do you make the leap from lockdep output on boot to my experience of
slow interactive response?
Also this patch was actually for 2.6.20 and you seem to have applied it to
2.6.21-rc2. I haven't even checked that it cleanly applies to that kernel.
It doesn't, a one line fix from Ingo conflicts (and a comment that was changed).
7355690ead6d61f6344072ae61060f985060da29 [PATCH] sched: fix SMT scheduler bug
72fd4a35a824331d7a0f4168d7576502d95d34b3 [PATCH] Numerous fixes to kernel-doc info in source files.
I have reverted your patch and the laggy behaviour remains when running
glxgears (in fact it seems a bit worse), I don't know about the thunderbird
lag while typing since I can't easily reproduce it but I don't recall it ever
happening before. So, your patch isn't the cause of a serious slowdown when
running glxgears in the background (although it doesn't improve the situation
much). It looks like it just slows down X in general rather than using much
CPU.
--
Simon Arlott
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