amrd disk performance drop after running under high load

Boris Samorodov bsam at ipt.ru
Thu Oct 18 13:27:43 PDT 2007


Hi!

Since nobody answered so far, here is my two cents. I'm not an expert
here so it's only my imho.

On Wed, 17 Oct 2007 22:52:49 +0400 Alexey Popov wrote:

> interrupt                          total       rate
> irq6: fdc0                             8          0
> irq14: ata0                           47          0
> irq16: uhci0                  1428187319       1851
                                ^^^^^^^^^^       ^^^^ [1]
> irq18: uhci2                    12374352         16
> irq23: ehci0                           3          0
> irq46: amr0                     11983237         15
> irq64: em0                    1427141755       1850
                                ^^^^^^^^^^       ^^^^ [2]
> cpu0: timer                   1540896452       1997
> cpu1: timer                   1542377798       1999
> Total                         5962960971       7730

[1] and [2] looks suspicious to me (totals and rate are too close to
each other and btw to timers). Let the latter (timers) alone. Do you
use any USB device? Can you try to use other network card? That
behaviour seems to be an interrupt storm and/or irq collision.


WBR
-- 
bsam


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