Re: Interrupt latency on some 945GM platforms

Jesse Barnes
2010-09-24T18:41:22Z

On Thu, 16 Sep 2010 18:03:04 +0300
Vasily Khoruzhick <anarsoul@gmail.com> wrote:

> В сообщении от 15 of September 2010 01:41:11 автор Sitsofe Wheeler написал:
> > > > processor.max_cstate=2
> > >
> > > Nope, it doesn't work with max_cstate=2
> >
> > Perhaps intel_idle is being used? Any mention of it in dmesg?
>
> Sitsofe, maybe you misunderstood me, I mean with max_cstate=1 graphics is
> smooth, with higher values (i.e. max_cstate=2) graphics is jerky.
>
> Btw, Jesse, any comments/solutions/workarounds except one with
> processor.max_cstate=1 in kernel commandline? Should I file a bug on fdo
> bugzilla?

FDO bug for this is https://bugs.freedesktop.org/show_bug.cgi?id=30364.

I still don't have a root cause, but at least we have a workaround.

--
Jesse Barnes, Intel Open Source Technology Center