Date: Tue, 20 Mar 2012 22:22:35 +1030 From: Matt Thyer <matt.thyer@gmail.com> To: Ivan Voras <ivoras@freebsd.org> Cc: freebsd-stable@freebsd.org Subject: Re: 157k interrupts per second causing 60% CPU load on idle system Message-ID: <CACM2%2B-6-_ocDL=4-kz31ejOB2jDb9_hjXUYKJ0-xqNfK2esorg@mail.gmail.com> In-Reply-To: <jk9mv3$n6k$2@dough.gmane.org> References: <CACM2%2B-46zHafjZo0O1dNNvEJm%2B2sUcYboBWwhJ8NxVhXyvpBZQ@mail.gmail.com> <jk9mv3$n6k$2@dough.gmane.org>
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On 20 March 2012 21:12, Ivan Voras <ivoras@freebsd.org> wrote: > On 20/03/2012 06:26, 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. > > > > Ok, but *which* interrupt is getting triggered? Please send the output > of "vmstat -i". > > > interrupt total rate irq16: uhci0+ 3392184862 126692 cpu0: timer 53549677 1999 irq256: mps0 2643187 98 irq257: re0 5508108 205 irq258: ahci0 160717 6 cpu1: timer 53525300 1999 cpu2: timer 53525300 1999 cpu3: timer 53525296 1999 Total 3614622447 134999
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