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http://i.imgur.com/sySQfsH.png
Please note the screenshot. I have an Ubuntu 12.10 box running Asterisk. I ssh'ed into the server the other day to find asterisk running at 100% CPU on one core, and i watched it for several days now, and it is always at 100% cpu on one core. I did some extensive google searching to find other people with the same problem and not very many similar situations like mine. Ideally i would like it to use multiple cores or perhaps just not 100% cpu as i assume this is the reason why i am having quality issues with the lines.
I do not know how to even start to troubleshooting this, does anyone have any ideas?
edit: (Additional info from PBX Admin)
System sees 20-40 active channels on average. All inbound SIP, no transcoding (except mix_monitor on all calls for recordings, which transcodes to gsm), g711ulaw 8kHz.
result of "core show threads" here: http://pastebin.com/n26V5LPE
htop shows asterisk thread (PID 1745) at 106% CPU (main thread it seems).
Quad-core with hyperthreading. Uptime 45 days.
Same behavior with verbosity/debug at levels 0 and 6.
Phone system downtime scheduled soon for lots of little bug fixes and tuneups. Any help is greatly appreciated!
I have several questions: 1) What version of asterisk? 2) What is mix-mon doing exactly? (It is notorious for using a lot of CPU) 3) are you using hand-edited dialplan? or a prebuilt distro of some sort? 4) You mentioned "quality issues" ... what sort of quality issues? – TheCompWiz – 2013-01-30T21:10:15.440
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1) Asterisk 10.9
2) [DID_trunk_1] exten = _X.,1,Set(CALLFILENAME=did/${STRFTIME(${EPOCH},,%Y)}/${STRFTIME(${EPOCH},,%m)}/${STRFTIME(${EPOCH},,%d)}/${STRFTIME(${EPOCH},,%H%M%S)}-${CALLERID(num)}-${EXTEN}) exten = _X.,n,MixMonitor(${CALLFILENAME}.gsm) exten = _X.,n,Set(AUDIOHOOK_INHERIT(MixMonitor)=yes) exten = _X.,n,Set(TIMEOUT(absolute)=21600) ;6 hours exten = _X.,n,Goto(DID_trunk_continue,${EXTEN},1)...
===3) Yes, hand-edited, extensively.
===4) PBX Admin has not heard consistent quality complaints, and could not isolate them to softphone, PBX, or caller.
– Ace – 2013-01-31T17:35:45.533@TheCompWiz sorry for the above comment, im not satisfied with the formatting, so heres a paste in response to your questions: [http://paste.ubuntu.com/1593633/] – Ace – 2013-01-31T17:38:43.240
Have you tried disabling the transcoding? (mixmon to a .g711 instead) What kind of channels are you using? IAX? Dahdi? SIP? ??? I've heard of problems with chan_iax sticking at 100% CPU... if you're not using it... disable it. – TheCompWiz – 2013-01-31T19:18:25.807
yeah, last night while we could afford some downtime, we rebooted the server and disabled all modules and no active channels, still 100% cpu
we are considering reinstalling OS and asterisk as a troubleshooting step. – Ace – 2013-01-31T20:42:11.097