Re: [git] CFS-devel, group scheduler, fixes

[Mike Galbraith <efault@gmx.de>]

On Fri, 2007-09-21 at 20:27 -0700, Tong Li wrote:
> Mike,
> 
> Could you try this patch to see if it solves the latency problem?

No, but it helps some when running two un-pinned busy loops, one at nice
0, and the other at nice 19.  Yesterday I hit latencies of up to 1.2
_seconds_ doing this, and logging sched_debug and /proc/`pidof
Xorg`/sched from SCHED_RR shells.

se.wait_max              :           164.242748
se.wait_max              :           121.996128
se.wait_max              :           194.464773
se.wait_max              :           517.425411
se.wait_max              :           131.453214
se.wait_max              :           122.984190
se.wait_max              :           111.729274
se.wait_max              :           119.567580
se.wait_max              :           126.980696
se.wait_max              :           177.241452
se.wait_max              :           129.604329
se.wait_max              :           119.631657

It doesn't help at all with this oddity while running same:

root@Homer: now is
the time
foooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooor aall good men to come to the aid of their country

That was a nice 0 shell window.  I'm not a great typist, but I ain't
_that_ bad :)

	-Mike

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