> I'm a bit confused, do you have one global CC that tracks the number of
> tasks across all runqueues in the system or one for each cpu? There
> could be some contention when updating that value on larger systems if
> it one global CC. If they are separate, how do you then decide when to
> consoli
On Sun, Apr 27, 2014 at 09:07:25PM +0100, Yuyang Du wrote:
> On Fri, Apr 25, 2014 at 03:53:34PM +0100, Morten Rasmussen wrote:
> > I fully agree. My point was that there is more to task consolidation
> > than just observing the degree of task parallelism. The system topology
> > has a lot to say wh
On Fri, Apr 25, 2014 at 03:53:34PM +0100, Morten Rasmussen wrote:
> I fully agree. My point was that there is more to task consolidation
> than just observing the degree of task parallelism. The system topology
> has a lot to say when deciding whether or not to pack. That was the
> motivation for p
On Friday, April 25, 2014 03:53:34 PM Morten Rasmussen wrote:
> On Fri, Apr 25, 2014 at 01:19:46PM +0100, Rafael J. Wysocki wrote:
[...]
> >
> > So in my opinion we need to figure out how to measure workloads while they
> > are
> > running and then use that information to make load balancing de
On Fri, Apr 25, 2014 at 01:19:46PM +0100, Rafael J. Wysocki wrote:
> On Friday, April 25, 2014 11:23:07 AM Morten Rasmussen wrote:
> > Hi Yuyang,
> >
> > On Thu, Apr 24, 2014 at 08:30:05PM +0100, Yuyang Du wrote:
> > > 1)Divide continuous time into periods of time, and average task
> > >
On Friday, April 25, 2014 11:23:07 AM Morten Rasmussen wrote:
> Hi Yuyang,
>
> On Thu, Apr 24, 2014 at 08:30:05PM +0100, Yuyang Du wrote:
> > 1) Divide continuous time into periods of time, and average task
> > concurrency
> > in period, for tolerating the transient bursts:
> > a = sum(concurren
Hi Yuyang,
On Thu, Apr 24, 2014 at 08:30:05PM +0100, Yuyang Du wrote:
> 1)Divide continuous time into periods of time, and average task
> concurrency
> in period, for tolerating the transient bursts:
> a = sum(concurrency * time) / period
> 2)Exponentially decay past periods, and synthesi
On Fri, Apr 25, 2014 at 10:00:02AM +0200, Vincent Guittot wrote:
> On 24 April 2014 21:30, Yuyang Du wrote:
> > Hi Ingo, PeterZ, and others,
> >
> > The current scheduler's load balancing is completely work-conserving. In
> > some
> > workload, generally low CPU utilization but immersed with CPU
On 24 April 2014 21:30, Yuyang Du wrote:
> Hi Ingo, PeterZ, and others,
>
> The current scheduler's load balancing is completely work-conserving. In some
> workload, generally low CPU utilization but immersed with CPU bursts of
> transient tasks, migrating task to engage all available CPUs for
> w
On Fri, 2014-04-25 at 03:30 +0800, Yuyang Du wrote:
> To track CC, we intercept the scheduler in 1) enqueue, 2) dequeue, 3)
> scheduler tick, and 4) enter/exit idle.
Boo hiss to 1, 2 and 4. Less fastpath math would be better.
-Mike
--
To unsubscribe from this list: send the line "unsubscribe l
10 matches
Mail list logo
