Date: Thu, 18 Oct 2007 23:56:26 +0400 From: Boris Samorodov <bsam@ipt.ru> Cc: freebsd-hackers@freebsd.org, freebsd-stable@freebsd.org Subject: Re: amrd disk performance drop after running under high load Message-ID: <07289061@ipt.ru> In-Reply-To: <47165A01.1030806@chistydom.ru> (Alexey Popov's message of "Wed\, 17 Oct 2007 22\:52\:49 %2B0400") References: <47137D36.1020305@chistydom.ru> <47140906.2020107@FreeBSD.org> <47146FB4.6040306@chistydom.ru> <47147E49.9020301@FreeBSD.org> <47149E6E.9000500@chistydom.ru> <4715035D.2090802@FreeBSD.org> <4715C297.1020905@chistydom.ru> <4715C5D7.7060806@FreeBSD.org> <47165A01.1030806@chistydom.ru>
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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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