--
On Tue, 23 Oct 2007, Dmitry Adamushko wrote:
> Hi Steven,
>
> agreed with your comments in the previous message. Indeed, I missed some
> points.
>
> > On wakeup, we can wake up several RT tasks (as my test case does) and if
> > we only push one task, then the other tasks may not migrate over
Hi Steven,
agreed with your comments in the previous message. Indeed, I missed some points.
> On wakeup, we can wake up several RT tasks (as my test case does) and if
> we only push one task, then the other tasks may not migrate over to the
> other run queues. I logged this happening in my tests.
On Sun, 2007-10-21 at 13:59 +0200, Dmitry Adamushko wrote:
> On 19/10/2007, Steven Rostedt <[EMAIL PROTECTED]> wrote:
>
> > [ ... ]
> >
> > @@ -2927,6 +2927,13 @@ static void idle_balance(int this_cpu, s
> > int pulled_task = -1;
> > unsigned long next_balance = jiffies + HZ;
> >
>
Hi Dmitry,
On Sun, 2007-10-21 at 11:35 +0200, Dmitry Adamushko wrote:
> Hi Steven,
>
> > When a pull RT is initiated, all overloaded runqueues are examined for
> > a RT task that is higher in prio than the highest prio task queued on the
> > target runqueue. If another runqueue holds a RT task t
On 19/10/2007, Steven Rostedt <[EMAIL PROTECTED]> wrote:
> [ ... ]
>
> @@ -2927,6 +2927,13 @@ static void idle_balance(int this_cpu, s
> int pulled_task = -1;
> unsigned long next_balance = jiffies + HZ;
>
> + /*
> +* pull_rt_task returns true if the run queue changed
Hi Steven,
> When a pull RT is initiated, all overloaded runqueues are examined for
> a RT task that is higher in prio than the highest prio task queued on the
> target runqueue. If another runqueue holds a RT task that is of higher
> prio than the highest prio task on the target runqueue is found
--
On Fri, 19 Oct 2007, Peter Zijlstra wrote:
> > > +
> > > + if (likely(!atomic_read(&rt_overload)))
> > > + return 0;
> >
> > This seems to be the only usage of rt_overload. I'm not sure its worth
> > keeping it around for this.
>
> Ingo just brought up a good point. With large smp (whe
On Fri, 2007-10-19 at 21:24 +0200, Peter Zijlstra wrote:
> On Fri, 2007-10-19 at 14:43 -0400, Steven Rostedt wrote:
> > plain text document attachment (rt-balance-pull-tasks.patch)
>
> > +static int pull_rt_task(struct rq *this_rq)
> > +{
> > + struct task_struct *next;
> > + struct task_stru
On Fri, 2007-10-19 at 14:43 -0400, Steven Rostedt wrote:
> plain text document attachment (rt-balance-pull-tasks.patch)
> +static int pull_rt_task(struct rq *this_rq)
> +{
> + struct task_struct *next;
> + struct task_struct *p;
> + struct rq *src_rq;
> + int this_cpu = this_rq->c
This patch adds the algorithm to pull tasks from RT overloaded runqueues.
When a pull RT is initiated, all overloaded runqueues are examined for
a RT task that is higher in prio than the highest prio task queued on the
target runqueue. If another runqueue holds a RT task that is of higher
prio tha
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