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

[Gernot Wolf]

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
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