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Date:      Sat, 24 Nov 2007 21:03:53 +0100
From:      Martin Matuska <mm@FreeBSD.org>
To:        freebsd-current@FreeBSD.org
Subject:   Re: 7.0-BETA3 (amd64): interrupt storm on atapci0
Message-ID:  <474883A9.4000502@FreeBSD.org>
In-Reply-To: <47480574.5030106@FreeBSD.org>
References:  <47480574.5030106@FreeBSD.org>

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I have done some more investigation and have found out the following:

- after doing a fresh restart, the "rate" reported in "vmstat -i" does
not decrease. It keeps increasing slowly, when there is larger interrupt
activity on atapci0 (irq22)

- "systat -vmstat" reports zero interrupts, and "vmstat -i" reports this
increasing rate

- when utilizing the disks at 100% (copying large files) the interrupt
rate is about 2300, which is truly high, but this correct number is
shown only in "systat -vmstat"



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