On Fri, 6 Nov 2015 08:45:10 +0100 Peter Zijlstra <pet...@infradead.org> wrote:
> On Thu, Nov 05, 2015 at 03:36:25PM -0800, Jacob Pan wrote: > > > I did some testing with the code below, it shows random > > [ 150.442597] NOHZ: local_softirq_pending 02 > > [ 153.032673] NOHZ: local_softirq_pending 202 > > [ 153.203785] NOHZ: local_softirq_pending 202 > > [ 153.206486] NOHZ: local_softirq_pending 282 > > I recalled that was why i checked for local_softirq_pending in the > > initial patch, still trying to find out how we can avoid that. These > > also causes non stop sched ticks in the inner idle loop. > > Check the softirq stuff before calling throttle ? yes, played with it but it seems there are other cases causing pending softirq in idle in addition to throttle. I still haven't figure it out, this problem only shows up in heavy irq, network load. e.g. compile kernel over NFS. Debugging. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
