Messages in this thread Patch in this message | | | Date | Wed, 13 Dec 2006 23:43:17 +0100 | From | Ingo Molnar <> | Subject | Re: [RFC] Patch: dynticks: idle load balancing |
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* Siddha, Suresh B <suresh.b.siddha@intel.com> wrote:
> Appended patch attempts to fix the process idle load balancing in the > presence of dynticks. cpus for which ticks are stopped will sleep till > the next event wakes it up. Potentially these sleeps can be for large > durations and during which today, there is no idle load balancing > being done. There was some discussion happened(last year) on this > topic on lkml, where two main approaches were gettting debated. One is > to back off the idle load balancing for bigger intervals and the > second is a watchdog mechanism where the busy cpu will trigger the > load balance on an idle cpu. Both of these mechanisms have its > drawbacks.
nice work! I have added your patch to -rt. Btw., it needs the patch below to work on 64-bit.
Ingo
Index: linux/kernel/sched.c =================================================================== --- linux.orig/kernel/sched.c +++ linux/kernel/sched.c @@ -1170,7 +1170,7 @@ static void resched_task(struct task_str static void resched_cpu(int cpu) { struct rq *rq = cpu_rq(cpu); - unsigned int flags; + unsigned long flags; spin_lock_irqsave(&rq->lock, flags); resched_task(cpu_curr(cpu)); - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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