Re: sched: odd values for effective load calculations

[Yuyang Du]

On Mon, Dec 15, 2014 at 11:51:46PM -0500, Sasha Levin wrote:
> On 12/15/2014 07:12 AM, Peter Zijlstra wrote:
> > 
> > Sorry for the long delay, I was out for a few weeks due to having become
> > a dad for the second time.
> 
> Congrats! May you be able to sleep at night sooner rather than later.
 
Congrats +1.

> 
> It's fairy reproducible, I've seen it happen quite a few times. What other
> information might be useful?
> 

Sasha, it might be helpful to see this_load is from:

this_load1: this_load = target_load(this_cpu, idx);

or

this_load2: this_load += effective_load(tg, this_cpu, -weight, -weight);

It really does not seem to be this_load1, while the calc of effective_load is a bit
complicated to see what the problem is.
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/