Date: Wed, 21 Mar 2012 19:44:00 -0400 From: Mike Tancsa <mike@sentex.net> To: Matt Thyer <matt.thyer@gmail.com> Cc: freebsd-stable@freebsd.org Subject: Re: 157k interrupts per second causing 60% CPU load on idle system Message-ID: <4F6A67C0.7000909@sentex.net> In-Reply-To: <CACM2%2B-46zHafjZo0O1dNNvEJm%2B2sUcYboBWwhJ8NxVhXyvpBZQ@mail.gmail.com> References: <CACM2%2B-46zHafjZo0O1dNNvEJm%2B2sUcYboBWwhJ8NxVhXyvpBZQ@mail.gmail.com>
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On 3/20/2012 1:26 AM, Matt Thyer wrote: > I've upgraded my FreeBSD-STABLE NAS from r225723 (22nd Sept 2011) to > r232477 (4th Mar 2012) and am finding that a system process called "intr" > is now constantly using about 60% of 1 CPU starting a short time after > reboot (possibly triggered by use of the samba server). > > When this starts, systat -vm 1 says that the system is 85% idle and 14% > interrupt handling. > It says that there's around 157k interrupts per second. > > Any idea what could be the cause ? This sounds like the problem I had with my intel board. BIOS update fixed it. What chipset and MB vendor do you have ? /usr/ports/sysutils/dmidecode is handy for digging up BIOS and chipset info http://lists.freebsd.org/pipermail/freebsd-questions/2012-March/239394.html ---Mike -- ------------------- Mike Tancsa, tel +1 519 651 3400 Sentex Communications, mike@sentex.net Providing Internet services since 1994 www.sentex.net Cambridge, Ontario Canada http://www.tancsa.com/
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