Date: Sun, 25 Dec 2011 18:10:17 +0200 From: =?windows-1251?B?yu7t/Oru4iDF4uPl7ejp?= <kes-kes@yandex.ru> To: "wishmaster" <artemrts@ukr.net> Cc: Daniel Staal <DStaal@usa.net>, freebsd-questions@freebsd.org Subject: Re[4]: high load system do not take all CPU time Message-ID: <621310179.20111225181017@yandex.ru> In-Reply-To: <70251.1324270448.8859926110310105088@ffe16.ukr.net> References: <3A4BDC1D114ED73D51E019BA@mac-pro.magehandbook.com> <1374625746.20111217102942@yandex.ru> <926001243.20111218194712@yandex.ru> <70251.1324270448.8859926110310105088@ffe16.ukr.net>
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Здравствуйте, wishmaster. Вы писали 19 декабря 2011 г., 6:54:08: w> --- Original message --- w> From: "Коньков Евгений" <kes-kes@yandex.ru> w> To: "Daniel Staal" <DStaal@usa.net> w> Date: 18 December 2011, 19:47:40 w> Subject: Re[2]: high load system do not take all CPU time w> w> >> Здравствуйте, Daniel. >> >> Вы писали 18 декабря 2011 г., 17:52:00: >> >> DS> --As of December 17, 2011 10:29:42 AM +0200, Коньков Евгений >> DS> is alleged to have said: >> >> >> How to debug why system do not use free CPU resouces? >> >> >> >> On this pictures you can see that CPU can not exceed 400tics >> >> http://piccy.info/view3/2368839/c9022754d5fcd64aff04482dd360b5b2/ >> >> http://piccy.info/view3/2368837/a12aeed98681ed10f1a22f5b5edc5abc/ >> >> http://piccy.info/view3/2368836/da6a67703af80eb0ab8088ab8421385c/ >> >> >> >> >> >> On these pictures you can see that problems begin with trafic on re0 >> >> when CPU load rise to "maximum" >> >> http://piccy.info/view3/2368834/512139edc56eea736881affcda490eca/ >> >> http://piccy.info/view3/2368827/d27aead22eff69fd1ec2b6aa15e2cea3/ >> >> >> >> But there is 25% CPU idle yet at that moment. >> >> DS> <snip> >> >> >># top -SIHP >> >> last pid: 93050; load averages: 1.45, 1.41, 1.29 >> >> up 9+16:32:06 10:28:43 237 processes: 5 running, 210 sleeping, 2 >> >> stopped, 20 waiting >> >> CPU 0: 0.8% user, 0.0% nice, 8.7% system, 17.7% interrupt, 72.8% idle >> >> CPU 1: 0.0% user, 0.0% nice, 9.1% system, 20.1% interrupt, 70.9% idle >> >> CPU 2: 0.4% user, 0.0% nice, 9.4% system, 19.7% interrupt, 70.5% idle >> >> CPU 3: 1.2% user, 0.0% nice, 6.3% system, 22.4% interrupt, 70.1% idle >> >> Mem: 843M Active, 2476M Inact, 347M Wired, 150M Cache, 112M Buf, 80M Free >> >> Swap: 4096M Total, 15M Used, 4080M Free >> >> DS> --As for the rest, it is mine. >> >> DS> You are I/O bound; most of your time is spent in interrupts. The CPU is >> DS> dealing with things as fast as it can get them, but it has to wait for the >> DS> disk and/or network card to get them to it. The CPU is not your problem; >> DS> if you need more performance, you need to tune the I/O. (And possibly get >> DS> better I/O cards, if available.) >> >> DS> Daniel T. Staal >> >> can I get interrupt limit or calculate it before that limit is >> reached? >> >> interrupt source is internal card: >> # vmstat -i >> interrupt total rate >> irq14: ata0 349756 78 >> irq16: ehci0 7427 1 >> irq23: ehci1 12150 2 >> cpu0:timer 18268704 4122 >> irq256: re0 85001260 19178 >> cpu1:timer 18262192 4120 >> cpu2:timer 18217064 4110 >> cpu3:timer 18210509 4108 >> Total 158329062 35724 >> >> Have you any good I/O tuning links to read? >> >> -- >> С уважением, >> Коньков mailto:kes-kes@yandex.ru w> w> Your problem is in the poor performance LAN Card. Guy from w> Calomel Org told you about it. He advised you to change to Intel Network Card. see at time 17:20 http://piccy.info/view3/2404329/dd9f28f8ac74d3d2f698ff14c305fe31/ at this point freeradius start to work slow because of no CPU time is allocated to it or is allocated to little and mpd5 start to drop users because of no response from radius. I do not know what idle were on 'top', sadly. does SNMP return right values for CPU usage? -- С уважением, Коньков mailto:kes-kes@yandex.ru
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