Re: [patch] CFS scheduler, -v13
- From: Ingo Molnar <mingo@xxxxxxx>
- Date: Fri, 18 May 2007 12:26:07 +0200
* Anant Nitya <kernel@xxxxxxxxxxxxxx> wrote:
Hi
Been testing this version of CFS from last an hour or so and still
facing same lag problems while browsing sites with heavy JS and or
flash usage. Mouse movement is pathetic and audio starts to skip. I
haven't face this behavior with CFS till v11.
i have just tried 5 different versions of the Flash plugin and i cannot
reproduce this (flash games are still smooth and acceptable even with
the system significantly overloaded with 5 infite loops or with a kernel
build), so it would be nice if you could help me debug this problem.
The last version that worked for you was v11, correct? The biggest v11
-> v12 change was the yield workaround, and while testing your workload
i also noticed that all Flash versions except the latest one (9.0 r31)
use sys_sched_yield() quite frequently. So it would be nice to know
which plugin version you are using (and which Firefox version): you can
check that by typing about:plugins into firefox. Furthermore, could you
also try the following tune:
echo 0 > /proc/sys/kernel/sched_yield_bug_workaround
and this:
echo 2 > /proc/sys/kernel/sched_yield_bug_workaround
if none of this changes behavior then please send me the output of the
following:
strace -ttt -TTT -o strace.txt -f -p `pidof firefox-bin`
< reproduce the lag in firefox >
< Ctrl-C the strace >
and send me the strace.txt file (off-line, it's going to be large).
Thanks,
Ingo
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