Date: Mon, 23 Aug 2010 08:39:15 -0400 From: John Baldwin <jhb@freebsd.org> To: freebsd-current@freebsd.org Cc: Doug Barton <dougb@freebsd.org>, Andriy Gapon <avg@icyb.net.ua> Subject: Re: runaway intr problems: powerd and/or hw.acpi.cpu.cx_lowest related Message-ID: <201008230839.15284.jhb@freebsd.org> In-Reply-To: <4C71E858.90009@FreeBSD.org> References: <4C71E858.90009@FreeBSD.org>
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On Sunday, August 22, 2010 11:17:44 pm Doug Barton wrote: > Thanks to help from Andriy I've been working on narrowing down the cause > of my "runaway intr" problems and we've found some interesting things. > First, if I use neither powerd nor set hw.acpi.cpu.cx_lowest less than > C1 things seem to work fine. Using one or the other sort of works, but > between the 2 powerd seems to cause the most problems. I think this just means that when C3 is enabled the system is getting skewed results in cp_time[] and so the stats are off. The system isn't actually stuck in an interrupt storm of sorts, the numbers reported to top are just wrong so it looks like it is. -- John Baldwin
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