Re: interactive task starvation

[Ingo Molnar <mingo@elte.hu>]

* Willy Tarreau <willy@w.ods.org> wrote:

> On Tue, Mar 21, 2006 at 10:14:22AM +0100, Ingo Molnar wrote:
> > 
> > * Willy Tarreau <willy@w.ods.org> wrote:
> > 
> > > 
> > > On Tue, Mar 21, 2006 at 08:51:38AM +0100, Mike Galbraith wrote:
> > > > On Tue, 2006-03-21 at 07:47 +0100, Willy Tarreau wrote:
> > > > > Hi Mike,
> > > > 
> > > > Greetings!
> > > 
> > > Thanks for the details,
> > > I'll try to find some time to test your code quickly. If this fixes this
> > > long standing problem, we should definitely try to get it into 2.6.17 !
> > 
> > the time window is quickly closing for that to happen though.
> 
> Ingo, Mike,
> 
> it's a great day :-)
> 
> Right now, I'm typing this mail from my notebook which has 8 instances 
> of my exploit running in background. Previously, 4 of them were enough 
> on this machine to create pauses of up to 31 seconds. Right now, I can 
> type normally, and I simply can say that my exploit has no effect 
> anymore ! It's just consuming CPU and nothing else. I also tried to 
> write 0 to grace_g[12] and I find it even more responsive with 0 in 
> those values. I've not had time to do more extensive tests, but I can 
> assure you that the problem is clearly solved for me. I'd like Grant 
> to test ssh on his firewall with it too.

great work by Mike! One detail: i'd like there to be just one default 
throttling value, i.e. no grace_g tunables [so that we have just one 
default scheduler behavior]. Is the default grace_g[12] setting good 
enough for your workload?

	Ingo
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