Re: How to obtain which interrupts cause system to hang?
PID USERNAMETHR PRI NICE SIZERES STATETIME WCPU COMMAND 11 root 1 171 ki31 0K16K RUN 24.9H 86.47% idle: cpu0 14 root 1 -44- 0K16K WAIT 689:52 10.25% swi1: net 2 root 1 -68- 0K16K sleep 207:35 4.69% ng_queue0 40 root 1 -68- 0K16K - 101:37 1.46% dummynet It looks like there's a bit going on here: you're using dummynet and netgraph, too? If this setup is unstable, or otherwise problematic, I'd suggest asking on the freebsd-net mailing list. I don't have much experience with some of these utilities, and I've haven't been running FreeBSD 7-* for a long time, so I've lost track of what problems have been fixed and back-ported. You may also want to look at your network and polling MIB and debugging variables, to see if they indicate any problems. b. ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to freebsd-questions-unsubscr...@freebsd.org
Re: How to obtain which interrupts cause system to hang?
How to obtain what nasty happen, which process take 36-50% of CPU resource? It partly depends upon the version of the OS that you are running, your hardware, and your configuration. 2008 interrupts/sec is high, but not improbably so, for kern.hz=1000, and not beyond the capabilities of today's average computer, although it may not be optimal for your workloads. So it may not actually be a problem with too many interrupts, but rather with some erroneous system accounting. This can happen, for example, if your computer is using some of the deeper power-saving C-states, but using them poorly, as for example in: http://lists.freebsd.org/pipermail/freebsd-current/2010-August/019383.html So you may want to examine, and perhaps adjust, your choice of kernel timers, kern.hz, and power-saving settings. Device polling can also be a factor, if you are using it. b. ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to freebsd-questions-unsubscr...@freebsd.org
Re: How to obtain which interrupts cause system to hang?
In freebsd-questions Digest, Vol 331, Issue 13, Message: 8 On Sat, 9 Oct 2010 20:05:48 +0300 ??? ??? kes-...@yandex.ru wrote: Content-Type: text/plain; charset=windows-1251 Hi KES, long time .. #systat -v 1 usersLoad 0.74 0.71 0.55 Oct 9 19:53 [..] Proc:Interrupts r p d s w Csw Trp Sys Int Sof Flt 24 cow2008 total 2 3 39 23k 67 5639 1710 47 15 zfod 9 ata0 irq14 ozfod nfe0 irq23 23.1%Sys 50.8%Intr 1.3%User 0.0%Nice 24.8%Idle%ozfod 1999 cpu0: time ||||||||||| daefr + 6 prcfr Yes, system and esp. interrupt time is heavy .. 23k context switches!? In addition to b. f.'s good advice .. as you later said, 2000 Hz slicing _should_ be ok, unless a slow CPU? Or perhaps a fast CPU throttled back too far .. powerd? Check sysctl dev.cpu.0.freq while this is happening. Disable p4tcc if it's a modern CPU; that usually hurts more than helps. Disable polling if you're using that .. you haven't provided much info, like is this with any network load, despite nfe0 showing no interrupts? #top last pid: 24571; load averages: 0.10, 0.49, 0.50up 0+19:15:01 19:56:36 42 processes: 3 running, 39 sleeping CPU: 0.7% user, 0.0% nice, 21.0% system, 36.3% interrupt, 41.9% idle Mem: 305M Active, 767M Inact, 252M Wired, 468K Cache, 213M Buf, 650M Free Swap: 4063M Total, 4063M Free PID USERNAMETHR PRI NICE SIZERES STATETIME WCPU COMMAND 1054 bind 4 40 134M 109M kqread 0:51 0.00% named 986 root 1 440 5692K 1408K RUN 0:50 0.00% syslogd 1162 clamav1 40 4616K 1468K accept 0:46 0.00% smtp-gated 11731 clamav1 200 27948K 9728K pause0:03 0.00% freshclam 11791 root 1 -580 7848K 4120K bpf 0:02 0.00% arpwatch 13208 root 1 440 10700K 4144K select 0:01 0.00% sendmail 13298 root 1 80 6748K 1440K nanslp 0:00 0.00% cron 12802 root 1 440 22880K 4004K select 0:00 0.00% sshd How to obtain what nasty happen, which process take 36-50% of CPU resource? Try 'top -S'. It's almost certainly system process[es], not shown above. cheers, Ian ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to freebsd-questions-unsubscr...@freebsd.org
