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

Miguel Figueiredo
2007-07-31T16:24:19Z

Em Terça, 31 de Julho de 2007 16:57, Matthew Hawkins escreveu:
> On 7/31/07, Miguel Figueiredo <elmig@debianpt.org> wrote:
> > CFS does not requeue_task() on SCHED_YIELD (used by graphic drivers) as
> > until 2.6.22 and -ck. Please try this hack [1] that makes -ck to behave
> > like CFS then you are comparing apples to apples.
>
> Hi Miguel,
>
> I tested with sched_yield_ctl set to 1
>
> 2.6.22.1-ck+sched_yield_hack
> 0 51
> 1 51
> 2 51
> 3 46
> 4 38
> 5 38
> 6 38
> 7 30
> 8 27
> 9 22
> 10 20
>
> After getting the numbers on all setups with the 10 loops still
> running I went for a run around the map (I used the "aggressor" map,
> if anyone cares). CFS was noticeably smoother (despite the small
> framerate differences). ie CFS was bordering on barely playable,
> whereas the above test it wasn't really playable (felt like playing on
> a lagged server). Even plain -ck was better (going for a run, the FPS
> jumped from ~2 to 15). I've noticed messing with sched_yield tends to
> cause strange defects in the past...

Have you tryied the 2 modes of the patch?

--

Com os melhores cumprimentos/Best regards,

Miguel Figueiredo