Messages in this thread | | | Subject | Re: [patch] voluntary-preempt-2.6.8-rc2-L2, preemptable hardirqs | From | Thomas Charbonnel <> | Date | Wed, 28 Jul 2004 17:08:18 +0200 |
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> * Thomas Charbonnel <thomas@undata.org> wrote: > > > The other source of xrun was seen during the disk write tests, once > > the memory runs out (spikes up to 14 ms, but more generally 6 ms) > > which particular filesystem and disk driver are you using? (ext3/IDE?) > The 'disk write tests' are those of latencytest-0.5.4? > > Ingo
It's an IDE reiserfs disk. Those are indeed the disk write tests from latencytest-0.5.4 My mistake about the spikes, they are more 3 ms than 6. You can see the results here : http://www.undata.org/~thomas/latencytest-0.5.4/rtc_freq_2048/ http://www.undata.org/~thomas/latencytest-0.5.4/rtc_freq_4096/ http://www.undata.org/~thomas/latencytest-0.5.4/rtc_freq_8192/
The traces always look the same :
T=29.6014 diff=14.4758 rtc_interrupt (+bd) handle_IRQ_event (+50) do_hardirq (+bc) irqd (+ac) kthread (+aa) irqd (+0) kthread (+0) kernel_thread_helper (+5)
Thomas
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