On 14/11/6 下午6:08, Peter Zijlstra wrote:
On Thu, Nov 06, 2014 at 09:46:34AM +0800, Wanpeng Li wrote:
Ah, it could be that for offline cpus we have a singleton rd. Lemme try
I still cannot find where build the singleton rd in the codes, could you
point out?
So this is all quite horrible
On Thu, Nov 06, 2014 at 09:46:34AM +0800, Wanpeng Li wrote:
> >Ah, it could be that for offline cpus we have a singleton rd. Lemme try
>
> I still cannot find where build the singleton rd in the codes, could you
> point out?
So this is all quite horrible code, but what I think happens is that:
On Thu, Nov 06, 2014 at 09:46:34AM +0800, Wanpeng Li wrote:
Ah, it could be that for offline cpus we have a singleton rd. Lemme try
I still cannot find where build the singleton rd in the codes, could you
point out?
So this is all quite horrible code, but what I think happens is that:
On 14/11/6 下午6:08, Peter Zijlstra wrote:
On Thu, Nov 06, 2014 at 09:46:34AM +0800, Wanpeng Li wrote:
Ah, it could be that for offline cpus we have a singleton rd. Lemme try
I still cannot find where build the singleton rd in the codes, could you
point out?
So this is all quite horrible
Hi Peter,
On Wed, Nov 05, 2014 at 01:52:54PM +0100, Peter Zijlstra wrote:
>On Wed, Nov 05, 2014 at 06:59:35PM +0800, Wanpeng Li wrote:
>> Hi Peter,
>> On 14/11/5 下午6:50, Peter Zijlstra wrote:
>> >On Wed, Nov 05, 2014 at 04:51:57PM +0800, Wanpeng Li wrote:
>> >>Note: dl task can be migrated
On Wed, Nov 05, 2014 at 04:14:00PM +0300, Kirill Tkhai wrote:
> > @@ -538,6 +539,39 @@ again:
> > update_rq_clock(rq);
> > dl_se->dl_throttled = 0;
> > dl_se->dl_yielded = 0;
> > +
> > + /*
> > +* So if we find that the rq the task was on is no longer
> > +* available, we
Hi, all,
В Ср, 05/11/2014 в 16:51 +0800, Wanpeng Li пишет:
> I observe that dl task can't be migrated to other cpus during cpu hotplug, in
> addition, task may/may not be running again if cpu is added back. The root
> cause
> which I found is that dl task will be throtted and removed from dl rq
On Wed, Nov 05, 2014 at 06:59:35PM +0800, Wanpeng Li wrote:
> Hi Peter,
> On 14/11/5 下午6:50, Peter Zijlstra wrote:
> >On Wed, Nov 05, 2014 at 04:51:57PM +0800, Wanpeng Li wrote:
> >>Note: dl task can be migrated successfully if rq is offline currently,
> >>however,
> >>I'm still not sure why
Hi Peter,
On 14/11/5 下午6:50, Peter Zijlstra wrote:
On Wed, Nov 05, 2014 at 04:51:57PM +0800, Wanpeng Li wrote:
Note: dl task can be migrated successfully if rq is offline currently, however,
I'm still not sure why task_rq(task)->rd->span just include the cpu which the dl
task previous running
On Wed, Nov 05, 2014 at 04:51:57PM +0800, Wanpeng Li wrote:
> Note: dl task can be migrated successfully if rq is offline currently,
> however,
> I'm still not sure why task_rq(task)->rd->span just include the cpu which the
> dl
> task previous running on, so cpu_active_mask is used in the
Hi Juri,
On 14/11/5 下午6:08, Juri Lelli wrote:
Hi,
On 05/11/14 08:51, Wanpeng Li wrote:
I observe that dl task can't be migrated to other cpus during cpu hotplug, in
addition, task may/may not be running again if cpu is added back. The root cause
which I found is that dl task will be throtted
Hi,
On 05/11/14 08:51, Wanpeng Li wrote:
> I observe that dl task can't be migrated to other cpus during cpu hotplug, in
> addition, task may/may not be running again if cpu is added back. The root
> cause
> which I found is that dl task will be throtted and removed from dl rq after
> comsuming
I observe that dl task can't be migrated to other cpus during cpu hotplug, in
addition, task may/may not be running again if cpu is added back. The root cause
which I found is that dl task will be throtted and removed from dl rq after
comsuming all budget, which leads to stop task can't pick it up
I observe that dl task can't be migrated to other cpus during cpu hotplug, in
addition, task may/may not be running again if cpu is added back. The root cause
which I found is that dl task will be throtted and removed from dl rq after
comsuming all budget, which leads to stop task can't pick it up
Hi,
On 05/11/14 08:51, Wanpeng Li wrote:
I observe that dl task can't be migrated to other cpus during cpu hotplug, in
addition, task may/may not be running again if cpu is added back. The root
cause
which I found is that dl task will be throtted and removed from dl rq after
comsuming all
Hi Juri,
On 14/11/5 下午6:08, Juri Lelli wrote:
Hi,
On 05/11/14 08:51, Wanpeng Li wrote:
I observe that dl task can't be migrated to other cpus during cpu hotplug, in
addition, task may/may not be running again if cpu is added back. The root cause
which I found is that dl task will be throtted
On Wed, Nov 05, 2014 at 04:51:57PM +0800, Wanpeng Li wrote:
Note: dl task can be migrated successfully if rq is offline currently,
however,
I'm still not sure why task_rq(task)-rd-span just include the cpu which the
dl
task previous running on, so cpu_active_mask is used in the patch.
Hi Peter,
On 14/11/5 下午6:50, Peter Zijlstra wrote:
On Wed, Nov 05, 2014 at 04:51:57PM +0800, Wanpeng Li wrote:
Note: dl task can be migrated successfully if rq is offline currently, however,
I'm still not sure why task_rq(task)-rd-span just include the cpu which the dl
task previous running on,
On Wed, Nov 05, 2014 at 06:59:35PM +0800, Wanpeng Li wrote:
Hi Peter,
On 14/11/5 下午6:50, Peter Zijlstra wrote:
On Wed, Nov 05, 2014 at 04:51:57PM +0800, Wanpeng Li wrote:
Note: dl task can be migrated successfully if rq is offline currently,
however,
I'm still not sure why
Hi, all,
В Ср, 05/11/2014 в 16:51 +0800, Wanpeng Li пишет:
I observe that dl task can't be migrated to other cpus during cpu hotplug, in
addition, task may/may not be running again if cpu is added back. The root
cause
which I found is that dl task will be throtted and removed from dl rq
On Wed, Nov 05, 2014 at 04:14:00PM +0300, Kirill Tkhai wrote:
@@ -538,6 +539,39 @@ again:
update_rq_clock(rq);
dl_se-dl_throttled = 0;
dl_se-dl_yielded = 0;
+
+ /*
+* So if we find that the rq the task was on is no longer
+* available, we need to select a new
Hi Peter,
On Wed, Nov 05, 2014 at 01:52:54PM +0100, Peter Zijlstra wrote:
On Wed, Nov 05, 2014 at 06:59:35PM +0800, Wanpeng Li wrote:
Hi Peter,
On 14/11/5 下午6:50, Peter Zijlstra wrote:
On Wed, Nov 05, 2014 at 04:51:57PM +0800, Wanpeng Li wrote:
Note: dl task can be migrated successfully if rq
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