Hi Paul,
On 30-Mar 14:15, Paul Turner wrote:
> On Mon, Mar 20, 2017 at 11:08 AM, Patrick Bellasi
> wrote:
> > On 20-Mar 13:15, Tejun Heo wrote:
> >> Hello,
> >>
> >> On Tue, Feb 28, 2017 at 02:38:38PM +, Patrick Bellasi wrote:
> >> > This patch extends the CPU controller by adding a couple of
On Mon, Mar 20, 2017 at 11:08 AM, Patrick Bellasi
wrote:
> On 20-Mar 13:15, Tejun Heo wrote:
>> Hello,
>>
>> On Tue, Feb 28, 2017 at 02:38:38PM +, Patrick Bellasi wrote:
>> > This patch extends the CPU controller by adding a couple of new
>> > attributes, capacity_min and capacity_max, which c
There is one important, fundamental difference here:
{cfs,rt}_{period,runtime}_us is a property that applies to a group of
threads, it can be sub-divided.
We can consume 100ms of quota either by having one thread run for
100ms, or 2 threads running for 50ms.
This is not true for capacity. It's a
Hello,
On Thu, Mar 23, 2017 at 11:37:50PM -0700, Joel Fernandes (Google) wrote:
> > That's also why we're gonna have problem if we later decide we need a
> > thread based API for it. Once we make cgroup the primary owner of the
> > attribute, it's not straight forward to add another owner.
>
> S
Hi Patrick,
On Thu, Mar 23, 2017 at 3:32 AM, Patrick Bellasi
wrote:
[..]
>> > which can be used to defined tunable root constraints when CGroups are
>> > not available, and becomes RO when CGroups are.
>> >
>> > Can this be eventually an acceptable option?
>> >
>> > In any case I think that this
Hi Tejun,
>> That's also why the proposed interface has now been defined as a extension of
>> the CPU controller in such a way to keep a consistent view.
>>
>> This controller is already used by run-times like Android to "scope" apps by
>> constraining the amount of CPUs resource they are getting.
Hello, Patrick.
On Thu, Mar 23, 2017 at 06:15:33PM +, Patrick Bellasi wrote:
> What is important to notice is that there is a middleware, in between
> the kernel and the applications. This is a special kind of user-space
> where it is still safe for the kernel to delegate some "decisions".
>
On 23-Mar 12:01, Tejun Heo wrote:
> Hello,
Hi Tejun,
> On Thu, Mar 23, 2017 at 10:32:54AM +, Patrick Bellasi wrote:
> > > But then we would lose out on being able to attach capacity
> > > constraints to specific tasks or groups of tasks?
> >
> > Yes, right. If CGroups are not available than
Hello,
On Thu, Mar 23, 2017 at 10:32:54AM +, Patrick Bellasi wrote:
> > But then we would lose out on being able to attach capacity
> > constraints to specific tasks or groups of tasks?
>
> Yes, right. If CGroups are not available than you cannot specify
> per-task constraints. This is just a
On 22-Mar 17:28, Joel Fernandes (Google) wrote:
> Hi,
>
> On Mon, Mar 20, 2017 at 11:08 AM, Patrick Bellasi
> wrote:
> > On 20-Mar 13:15, Tejun Heo wrote:
> >> Hello,
> >>
> >> On Tue, Feb 28, 2017 at 02:38:38PM +, Patrick Bellasi wrote:
> [..]
> >> > These attributes:
> >> > a) are tunable a
Hi,
On Mon, Mar 20, 2017 at 11:08 AM, Patrick Bellasi
wrote:
> On 20-Mar 13:15, Tejun Heo wrote:
>> Hello,
>>
>> On Tue, Feb 28, 2017 at 02:38:38PM +, Patrick Bellasi wrote:
[..]
>> > These attributes:
>> > a) are tunable at all hierarchy levels, i.e. root group too
>>
>> This usually is prob
Hello,
On Tue, Feb 28, 2017 at 02:38:38PM +, Patrick Bellasi wrote:
> This patch extends the CPU controller by adding a couple of new
> attributes, capacity_min and capacity_max, which can be used to enforce
> bandwidth boosting and capping. More specifically:
>
> - capacity_min: defines the
On 20-Mar 13:15, Tejun Heo wrote:
> Hello,
>
> On Tue, Feb 28, 2017 at 02:38:38PM +, Patrick Bellasi wrote:
> > This patch extends the CPU controller by adding a couple of new
> > attributes, capacity_min and capacity_max, which can be used to enforce
> > bandwidth boosting and capping. More s
On Mon, Mar 20, 2017 at 01:15:11PM -0400, Tejun Heo wrote:
> > a) are tunable at all hierarchy levels, i.e. root group too
>
> This usually is problematic because there should be a non-cgroup way
> of configuring the feature in case cgroup isn't configured or used,
> and it becomes awkward to have
On 15-Mar 10:24, Paul E. McKenney wrote:
> On Wed, Mar 15, 2017 at 04:44:39PM +, Patrick Bellasi wrote:
> > On 15-Mar 09:10, Paul E. McKenney wrote:
> > > On Wed, Mar 15, 2017 at 06:20:28AM -0700, Joel Fernandes wrote:
> > > > On Wed, Mar 15, 2017 at 4:20 AM, Patrick Bellasi
> > > > wrote:
> >
On Wed, Mar 15, 2017 at 04:44:39PM +, Patrick Bellasi wrote:
> On 15-Mar 09:10, Paul E. McKenney wrote:
> > On Wed, Mar 15, 2017 at 06:20:28AM -0700, Joel Fernandes wrote:
> > > On Wed, Mar 15, 2017 at 4:20 AM, Patrick Bellasi
> > > wrote:
> > > > On 13-Mar 03:46, Joel Fernandes (Google) wrote
On 15-Mar 09:10, Paul E. McKenney wrote:
> On Wed, Mar 15, 2017 at 06:20:28AM -0700, Joel Fernandes wrote:
> > On Wed, Mar 15, 2017 at 4:20 AM, Patrick Bellasi
> > wrote:
> > > On 13-Mar 03:46, Joel Fernandes (Google) wrote:
> > >> On Tue, Feb 28, 2017 at 6:38 AM, Patrick Bellasi
> > >> wrote:
>
On Wed, Mar 15, 2017 at 06:20:28AM -0700, Joel Fernandes wrote:
> On Wed, Mar 15, 2017 at 4:20 AM, Patrick Bellasi
> wrote:
> > On 13-Mar 03:46, Joel Fernandes (Google) wrote:
> >> On Tue, Feb 28, 2017 at 6:38 AM, Patrick Bellasi
> >> wrote:
> >> > The CPU CGroup controller allows to assign a spe
On Wed, Mar 15, 2017 at 4:20 AM, Patrick Bellasi
wrote:
> On 13-Mar 03:46, Joel Fernandes (Google) wrote:
>> On Tue, Feb 28, 2017 at 6:38 AM, Patrick Bellasi
>> wrote:
>> > The CPU CGroup controller allows to assign a specified (maximum)
>> > bandwidth to tasks within a group, however it does not
On 13-Mar 03:46, Joel Fernandes (Google) wrote:
> On Tue, Feb 28, 2017 at 6:38 AM, Patrick Bellasi
> wrote:
> > The CPU CGroup controller allows to assign a specified (maximum)
> > bandwidth to tasks within a group, however it does not enforce any
> > constraint on how such bandwidth can be consum
On Tue, Feb 28, 2017 at 6:38 AM, Patrick Bellasi
wrote:
> The CPU CGroup controller allows to assign a specified (maximum)
> bandwidth to tasks within a group, however it does not enforce any
> constraint on how such bandwidth can be consumed.
> With the integration of schedutil, the scheduler has
The CPU CGroup controller allows to assign a specified (maximum)
bandwidth to tasks within a group, however it does not enforce any
constraint on how such bandwidth can be consumed.
With the integration of schedutil, the scheduler has now the proper
information about a task to select the most suit
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