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On Tue, Mar 30, 2004 at 01:30:00PM -0800, David S. Miller wrote: > On Tue, 30 Mar 2004 23:14:50 +0200 > Andrea Arcangeli <andrea@suse.de> wrote: > > > > There are no hardirqs in the case under investigation, remember? > > > > no hardirqs? there must be tons of hardirqs if ksoftirqd never runs. > > NAPI should be kicking in for this workload, and I know for a fact it is > for Robert's case. There should only be a few thousand hard irqs per > second. > > Until the RX ring is depleted the device's hardirqs will not be re- > enabled. then Dipankar is reproducing with a workload that is completely different. I've only seen the emails from Dipankar so I couldn't know it was a NAPI load. He posted these numbers: softirq_count, ksoftirqd_count and other_softirq_count shows - CPU 0 : 638240 554 637686 CPU 1 : 102316 1 102315 CPU 2 : 675696 557 675139 CPU 3 : 102305 0 102305 that means nothing runs in ksoftirqd for Dipankar, so he cannot be using NAPI. Either that or I'm misreading his numbers, or his stats results are wrong. - 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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