Re: Sending some form of notifaction when sched_fifo throttling kicks in...

[Balbir Singh <balbir@linux.vnet.ibm.com>]

* Dario Faggioli <raistlin@linux.it> [2010-12-23 15:44:56]:

> On Thu, 2010-12-23 at 15:04 +0100, Dhaval Giani wrote: 
> > > ... If you think you're fine with some /proc (and perhaps cpuacct, if
> > > cgroups are being used) readable, I can try to come up with something.
> > >
> > 
> > There is no point in putting it in cpuacct since cpuacct can be used
> > separately from cpu.
> > 
> Which would mean that you'd need both for having such stat. Anyway, I'm
> fine with putting this in 'cpu' as well, just trying to find a consensus
> on what the right place is.
> 
> > > Do others have some idea and/or comments about that? This is
> > > ABI/interface, and that really scares me! :-P
> > 
> > IIRC, your patchset had something like this for getting the
> > statistics? Starting fromt hre, would schedstats be the right place?
> > 
> SCHED_DEADLINE patchset has both signaling capabilities and some
> statistic reporting, bat it's a different thing.
> 
> I think schedstat could be the right place for _this_ thing here, but
> since each cgroup could be throttled, we also need something which is
> per-cgroup... Don't you agree?
>

You definitely need something per cgroup, have you looked at the
events framework in cgroups and its implementation in memcgroup?



-- 
	Three Cheers,
	Balbir