[OpenIndiana-discuss] Problem with high cpu load (oi_151a)

[Michael Stapleton]

Sure do :-)


People tend to think only about ZFS and maybe Zones. They don't
understand dtrace and resource management.

Solaris is much more than ZFS, but you really have to know what you are
doing to appreciate it.

The true strength of Solaris is server side in the hands of
professionals.

There has been a bit of back and forth about Linux and OpenIndiana
lately, personaly I think we should focus on our strengths. 



Mike

On Thu, 2011-10-20 at 10:27 -0700, Rennie Allen wrote:

> Dontchya just love dtrace?
> 
> 
> On 10/20/11 10:22 AM, "Michael Stapleton"
> <michael.stapleton at techsologic.com> wrote:
> 
> >Hi Gernot,
> >
> >You have a high context switch rate.
> >
> >try 
> >#dtrace -n 'sched:::off-cpu { @[execname]=count()}'
> >
> >For a few seconds to see if you can get the name of and executable.
> >
> >Mike
> >On Thu, 2011-10-20 at 18:44 +0200, Gernot Wolf wrote:
> >
> >> Hello all,
> >> 
> >> I have a machine here at my home running OpenIndiana oi_151a, which
> >> serves as a NAS on my home network. The original install was
> >>OpenSolaris 
> >> 2009.6 which was later upgraded to snv_134b, and recently to oi_151a.
> >> 
> >> So far this OSOL (now OI) box has performed excellently, with one major
> >> exception: Sometimes, after a reboot, the cpu load was about 50-60%,
> >> although the system was doing nothing. Until recently, another reboot
> >> solved the issue.
> >> 
> >> This does not work any longer. The system has always a cpu load of
> >> 50-60% when idle (and higher of course when there is actually some work
> >> to do).
> >> 
> >> I've already googled the symptoms. This didn't turn up very much useful
> >> info, and the few things I found didn't apply to my problem. Most
> >> noticably was this problem which could be solved by disabling cpupm in
> >> /etc/power.conf, but trying that didn't show any effect on my system.
> >> 
> >> So I'm finally out of my depth. I have to admit that my knowledge of
> >> Unix is superficial at best, so I decided to try looking for help here.
> >> 
> >> I've run several diagnostic commands like top, powertop, lockstat etc.
> >> and attached the results to this email (I've zipped the results of
> >>kstat 
> >> because they were >1MB).
> >> 
> >> One important thing is that when I boot into the oi_151a live dvd
> >> instead of booting into the installed system, I also get the high cpu
> >> load. I mention this because I have installed several things on my OI
> >> box like vsftpd, svn, netstat etc. I first thought that this problem
> >> might be caused by some of this extra stuff, but getting the same
> >>system 
> >> when booting the live dvd ruled that out (I think).
> >> 
> >> The machine is a custom build medium tower:
> >> S-775 Intel DG965WHMKR ATX mainbord
> >> Intel Core 2 Duo E4300 CPU 1.8GHz
> >> 1x IDE DVD recorder
> >> 1x IDE HD 200GB (serves as system drive)
> >> 6x SATA II 1.5TB HD (configured as zfs raidz2 array)
> >> 
> >> I have to solve this problem. Although the system runs fine and
> >> absolutely serves it's purpose, having the cpu at 50-60% load
> >>constantly 
> >> is a waste of energy and surely a rather unhealthy stress on the
> >>hardware.
> >> 
> >> Anyone any ideas...?
> >> 
> >> Regards,
> >> Gernot Wolf
> >> _______________________________________________
> >> OpenIndiana-discuss mailing list
> >> OpenIndiana-discuss at openindiana.org
> >> http://openindiana.org/mailman/listinfo/openindiana-discuss
> >
> >
> >_______________________________________________
> >OpenIndiana-discuss mailing list
> >OpenIndiana-discuss at openindiana.org
> >http://openindiana.org/mailman/listinfo/openindiana-discuss
> 
> 
> 
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