Date: Tue, 14 Feb 2006 00:09:34 +0100 From: Frank Steinborn <frank@ircnow.org> To: freebsd-stable@freebsd.org Subject: calcru: negative time (Interrupt Storm on cpu0: timer) Message-ID: <20060213230934.GA1549@scott.blazing.de>
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Hello, After reboot yesterday, my system suddenly started to flood syslog with following message: calcru: runtime went backwards from 1966191374 usec to 1966189453 usec for pid 29988 (screen) It's not only screen, i saw sh and su also, but in the last hour only screen. A vmstat -i and the same 5 seconds later: interrupt total rate irq1: atkbd0 1 0 irq13: npx0 1 0 irq14: ata0 410366 5 irq17: em0 20882069 263 cpu0: timer 158483081 2000 Total 179775518 2268 interrupt total rate irq1: atkbd0 1 0 irq13: npx0 1 0 irq14: ata0 410430 5 irq17: em0 20885602 263 cpu0: timer 158505514 2000 Total 179801548 2268 Is this an interrupt storm? I know that there is a FAQ entry about the negative time issue, but it seems this is more a bad workaround I guess. The system was running without problems for 3 months or so and as I said the problem suddenly appeared yesterday. Any hints on whats wrong here? Thanks in advance, Frank
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