Date: Fri, 23 Mar 2012 01:03:47 +1030 From: Matt Thyer <matt.thyer@gmail.com> To: Mike Tancsa <mike@sentex.net> Cc: freebsd-stable@freebsd.org Subject: Re: 157k interrupts per second causing 60% CPU load on idle system Message-ID: <CACM2%2B-6BubOF1uWtXcBQyZqeiuqhvXazL9564CwN9uhJVNe2_w@mail.gmail.com> In-Reply-To: <4F6A67C0.7000909@sentex.net> References: <CACM2%2B-46zHafjZo0O1dNNvEJm%2B2sUcYboBWwhJ8NxVhXyvpBZQ@mail.gmail.com> <4F6A67C0.7000909@sentex.net>
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On Mar 22, 2012 10:14 AM, "Mike Tancsa" <mike@sentex.net> wrote: > > 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 ? The original post tells you this. I've already updated to the latest BIOS and this could have caused the problem. I think I should try updating the firmware of the SAS/SATA HBA but not until I've confirmed if a BIOS downgrade works. Unfortunately it's very hard to get downtime on this system so it may be some time before I can report any news.
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