Date: Fri, 14 Jul 2006 13:06:58 +0100 From: Gareth McCaughan <gmccaughan@synaptics-uk.com> To: freebsd-questions@freebsd.org Cc: freebsd-stable@freebsd.org Subject: Re: "swiN: clock sio" process taking 75% CPU Message-ID: <200607141306.58682.gmccaughan@synaptics-uk.com> In-Reply-To: <200607132002.43637.gmccaughan@synaptics-uk.com> References: <200607132002.43637.gmccaughan@synaptics-uk.com>
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I wrote, inter alia, > About 6 minutes after booting (on two occasions; I don't > guarantee that this doesn't vary), a process that appears > in the output of "ps" as "[swi4: clock sio]" begins to > use about 3/4 of the machine's CPU. I think it does so > more or less instantaneously. It continues to do so > indefinitely, so far as I can tell. David Wolfskill e-mailed me off-list to suggest looking at the output of "vmstat -i". Answer: the interrupt rates all appear to be normal, or at least similar to those he observes on his machines which don't exhibit my problem. More specifically ... ---------- excerpt from my reply to David begins ---------- I get this: | interrupt total rate | irq1: atkbd0 3 0 | irq6: fdc0 10 0 | irq14: ata0 2913 1 | irq15: ata1 47 0 | irq17: xl0 7342 4 | cpu0: timer 302649 199 | Total 312964 206 (so the rate of timer interrupts doesn't appear to be insane) and | 7:56PM up 26 mins, 1 user, load averages: 1.87, 1.45, 1.08 (so the cost in CPU cycles of servicing them -- if that's what the rogue process is doing, which seems somewhat plausible -- *does* appear to be insane). ---------- excerpt from my reply to David ends ---------- -- g
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