SCHED_ULE on desktop system
Marc Fonvieille
blackend at freebsd.org
Wed Oct 3 09:34:06 PDT 2007
On Tue, Oct 02, 2007 at 09:02:08PM +0200, Marc Fonvieille wrote:
> On Tue, Oct 02, 2007 at 01:07:57AM -0700, Jeff Roberson wrote:
> > >I tried with _4BSD and it gives the same behavior (I even downgraded
> > >Xorg to 7.2). Renicing X does not really help.
> > >
> > >I use nvidia or nv driver (nvidia one is a bit less worse). The lag can
> > >even appears with 4% of CPU usage according to top(1).
> > >Thanks to your remarks and my tests, I'm now sure it's scheduler
> > >independent. It seems 7-CURRENT is slower than 6.X regarding I/O :(
> > >For info the box is a 1.2GHz Athlon with 1GB of RAM and swap is never
> > >used.
> >
> > Can you try with ULE and the attached diff? sched_yield() behavior
> > changed between 6.x and 7-CURRENT. This has been referenced in other bug
> > reports. Please let me know if this helps.
> >
>
> Ok, I'm going to test with your patch.
>
No noticeable difference :(
I'll try with the patches set you posted today.
--
Marc
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