On Tue, Mar 20, 2012 at 11:10:10PM +1030, Matt Thyer wrote: > On 20 March 2012 22:24, Ivan Voras <[email protected]> wrote: > > > On 20 March 2012 12:52, Matt Thyer <[email protected]> wrote: > > > On 20 March 2012 21:12, Ivan Voras <[email protected]> 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 > > > > Ok, something's probably wrong with USB. Can you disable it in BIOS? > > > > > > > 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 > > > > > > > I did just update the BIOS at about the same time so the difference may be > due to that change. > > I'll try a few things such as: > > - Unplugging any USB things (I've only got a keyboard plugged in). > - Downgrade BIOS. > > I'll get back to you all soon.
It would be interesting to know if there are other devices on irq16 also. grep 'irq 16' /var/run/dmesg.boot I think the '+' on the irq16 line from vmstat means the interrupt is shared, but the man page doesn't mention it so I'm not 100% sure Thanks, Gary _______________________________________________ [email protected] mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-stable To unsubscribe, send any mail to "[email protected]"
