Re: sluggish system responsiveness under higher IO load

From: Mike Galbraith
Date: Sun Sep 24 2006 - 14:14:59 EST

On Sun, 2006-09-24 at 16:32 +0200, Matthias Dahl wrote:
> On Friday 15 September 2006 20:17, Jens Axboe wrote:
> > Sounds like a hardware issue, someone could be hogging the bus. You
> > could try and play with the pci latency setting.
> Is there a way I can debug this...? I really would like to get to the bottom
> of this somehow. I did one more test: installed and started enemy territory
> because it's free and heavily uses OpenGL... works fine so far. But simply
> starting an untar process in the background while et is running causes quite
> distorted sound and even the mouse pointer won't react in time anymore until
> the untar process is finished. This can't be right. IO load shouldn't cause
> sluggish responsiveness...

It depends a lot on how the application is written. Start your app at
nice -10, and retry the IO interference test.


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