On Thu, Jul 31, 2014 at 09:54:21AM +0100, Morten Rasmussen wrote:
>
> Overall, it is not clear to me why it is necessary to rewrite the
> per-entity load-tracking. The code is somewhat simpler, but I don't see
> any functional additions/improvements. If we have to go through a long
> review and te
On Wed, Jul 30, 2014 at 08:17:39PM +0100, Yuyang Du wrote:
> Hi Morten,
>
> On Wed, Jul 30, 2014 at 11:13:31AM +0100, Morten Rasmussen wrote:
> > > > 2. runnable_load_avg and blocked_load_avg are combined
> > > >
> > > > runnable_load_avg currently represents the sum of load_avg_contrib of
> > >
Hi Morten,
On Wed, Jul 30, 2014 at 11:13:31AM +0100, Morten Rasmussen wrote:
> > > 2. runnable_load_avg and blocked_load_avg are combined
> > >
> > > runnable_load_avg currently represents the sum of load_avg_contrib of
> > > all tasks on the rq, while blocked_load_avg is the sum of those tasks
>
On Wed, Jul 30, 2014 at 11:21:28AM +0100, Peter Zijlstra wrote:
> On Wed, Jul 30, 2014 at 11:13:31AM +0100, Morten Rasmussen wrote:
> > It is a very real problem when user-space uses priorities extensively
> > like Android does. Tasks related to audio run at very high priorities
> > but only for a
On Wed, Jul 30, 2014 at 11:13:31AM +0100, Morten Rasmussen wrote:
> It is a very real problem when user-space uses priorities extensively
> like Android does. Tasks related to audio run at very high priorities
> but only for a very short amount of time, but due the to priority
> scaling their load
On Sun, Jul 27, 2014 at 08:02:37PM +0100, Yuyang Du wrote:
> Hi Morten,
>
> On Fri, Jul 18, 2014 at 04:39:31PM +0100, Morten Rasmussen wrote:
> > 1. runnable_avg_period is removed
> >
> > load_avg_contrib used to be runnable_avg_sum/runnable_avg_period scaled
> > by the task load weight (priority
On Tue, Jul 29, 2014 at 09:17:13AM +0800, Yuyang Du wrote:
> On Mon, Jul 28, 2014 at 12:38:12PM +0200, Peter Zijlstra wrote:
> > On Mon, Jul 28, 2014 at 03:02:37AM +0800, Yuyang Du wrote:
> > > > Another thing that might be an issue is that the blocked of a terminated
> > > > task lives on for quit
On Mon, Jul 28, 2014 at 12:38:12PM +0200, Peter Zijlstra wrote:
> On Mon, Jul 28, 2014 at 03:02:37AM +0800, Yuyang Du wrote:
> > > Another thing that might be an issue is that the blocked of a terminated
> > > task lives on for quite a while until has decayed away.
> >
> > Good point. To do so, if
On Mon, Jul 28, 2014 at 03:02:37AM +0800, Yuyang Du wrote:
> > Another thing that might be an issue is that the blocked of a terminated
> > task lives on for quite a while until has decayed away.
>
> Good point. To do so, if I read correctly, we need to hook do_exit(), but
> probably
> we are gon
On Mon, Jul 28, 2014 at 03:34:53AM +0800, Yuyang Du wrote:
> Thanks a lot, Mike.
>
> Ben asked for this test, but actually I don't know how to get pipe-test, still
> not even after google it.
perf bench sched pipe
I realize that's a mouth full, but there it is.
pgpuZBDC7SrZ8.pgp
Description: P
On Mon, Jul 28, 2014 at 09:49:18AM +0200, Mike Galbraith wrote:
> On Mon, 2014-07-28 at 03:34 +0800, Yuyang Du wrote:
> > Thanks a lot, Mike.
> >
> > Ben asked for this test, but actually I don't know how to get pipe-test,
> > still
> > not even after google it.
>
> You could write it trivially
On Mon, 2014-07-28 at 03:34 +0800, Yuyang Du wrote:
> Thanks a lot, Mike.
>
> Ben asked for this test, but actually I don't know how to get pipe-test, still
> not even after google it.
You could write it trivially, it's just pipe ping-pong. I can send you
a copy of the one I use if you like. I
Thanks a lot, Mike.
Ben asked for this test, but actually I don't know how to get pipe-test, still
not even after google it.
On Sun, Jul 20, 2014 at 07:46:23AM +0200, Mike Galbraith wrote:
> On Fri, 2014-07-18 at 07:26 +0800, Yuyang Du wrote:
> > Thanks to Morten, Ben, and Fengguang.
> >
> > v4
Hi Morten,
On Fri, Jul 18, 2014 at 04:39:31PM +0100, Morten Rasmussen wrote:
> 1. runnable_avg_period is removed
>
> load_avg_contrib used to be runnable_avg_sum/runnable_avg_period scaled
> by the task load weight (priority). The runnable_avg_period is replaced
> by a constant in this patch set.
On Fri, 2014-07-18 at 07:26 +0800, Yuyang Du wrote:
> Thanks to Morten, Ben, and Fengguang.
>
> v4 changes:
>
> - Insert memory barrier before writing cfs_rq->load_last_update_copy.
> - Fix typos.
My little desktop box says lovely minus signs have had their usual
effect on the general case (cgr
On Fri, Jul 18, 2014 at 12:26:04AM +0100, Yuyang Du wrote:
> Thanks to Morten, Ben, and Fengguang.
>
> v4 changes:
>
> - Insert memory barrier before writing cfs_rq->load_last_update_copy.
> - Fix typos.
It is quite a challenge keeping up with your revisions :) Three
revisions in five days. It t
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