Date: Sat, 24 Nov 2007 21:18:19 +0100 From: Martin Matuska <mm@FreeBSD.org> To: freebsd-current@FreeBSD.org Subject: Re: 7.0-BETA3 (amd64): interrupt storm on atapci0 Message-ID: <4748870B.2000907@FreeBSD.org> In-Reply-To: <474883A9.4000502@FreeBSD.org> References: <47480574.5030106@FreeBSD.org> <474883A9.4000502@FreeBSD.org>
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Sorry, the "rate" of "vmstat -i" is undocumented. I have read the vmstat.c file and found out that "rate" it is the uptime average so it has no effect. I will do some stress testing with dd if=/dev/mirror/... of=/dev/null (this takes an interrupt rate of about 14000 interrupts/second). Martin Matuska wrote / napísal(a): > 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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