Date: Sat, 11 Oct 2008 20:51:48 +0100 From: Kris Kennaway <kris@FreeBSD.org> To: Tomas Randa <freebsd@max.af.czu.cz.cz> Cc: miks@skynet.lv, freebsd-amd64@freebsd.org Subject: Re: amd64/127451: top(1): incorrect load shown on quad core Message-ID: <48F103D4.6050105@FreeBSD.org> In-Reply-To: <48EA739A.3000506@max.af.czu.cz.cz>
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Tomas Randa wrote: > I have similar problem on my Xeon5000 quad core system with 7.1 > PRERELEASE / AMD64. Tried anybody to change scheduler from ULE to 4BSD? > I tried to change some sysctl variables, but no success. > > Thanks for help. > > Tomas Randa > > > =============================== > > From: miks@skynet.lv > To: bug-followup@FreeBSD.org, miks@skynet.lv > Cc: Subject: Re: amd64/127451: top(1): incorrect load shown on quad core > Date: Thu, 18 Sep 2008 21:50:06 +0300 > > > > I got load average around 0.5, and top show something like this > "1021 processes: 1 running, 1020 sleeping > CPU states: 4.9% user, 0.0% nice, 3.6% system, 0.9% interrupt, > 90.6% idle" - this all is ok. > > then once in 2-5 minutes, there for 2-3 seconds are: > "1020 processes:67 running, 912 sleeping, 1 zombie, 40 lock > CPU states: 3.0% user, 0.0% nice, 96.7% system, 0.3% interrupt, > 0.0% idle" - this is the problem. > > after this load average is 20-30 and dropping in 2-3min to 0.5. during > this time system is very slow. even ssh session is freezing. > most of processes are fastcgi/php, so there is not one big resource > hungry process. > > found similar problem here: > http://unix.derkeiler.com/Mailing-Lists/FreeBSD/stable/2007-11/msg00551.html I sam not sure what you are claiming the problem is. Your system is being transiently overloaded by processes that eat all CPU, and that is what top shows you. Krishome | help
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