Re: [ck] Re: SD still better than CFS for 3d ?(was Re: 2.6.23-rc1)

Ingo Molnar
2007-07-31T09:45:56Z

* Kenneth Prugh <ken69267@gmail.com> wrote:

> Alright, Just got done with some testing of UT2004 between 2.6.23-rc1
> CFS and 2.6.22-ck1 SD. This series of tests was run by spawning in a
> map while not moving at all and always facing the same direction,
> while slowing increasing the number of loops.
>
> CFS generally seemed a lot smoother as the load increased, while SD
> broke down to a highly unstable fps count that fluctuated massively
> around the third loop. Seems like I will stick to CFS for gaming now.
>
> Below you will find the results of my test with the average number of
> FPS.

Thanks Kenneth for the testing! I've created a graph out of your
numbers:

http://people.redhat.com/mingo/misc/cfs-sd-ut2004-perf.jpg

(it also includes the SD numbers you got with the turn-yield-into-NOP
hack applied.)

Ingo