Hi Folks,

I have three newly installed servers that if left idle their processor
usage shoots up to 49% as can be seen from this prstat:

PID USERNAME SIZE RSS STATE PRI NICE TIME CPU PROCESS/NLWP
627 root 77M 7512K cpu2 10 0 3:45:00 49% Xsun/1
19458 root 4560K 4232K cpu0 49 0 0:00:00 0.0% prstat/1

....(load of other stuff cut out!)

Total: 51 processes, 161 lwps, load averages: 1.27, 1.31, 1.33

I have tried to track down whats causing this, but can't work it out!
If I actually go to the server and move the mouse or press a key the
XDM screen appears and the processor usage drops so I am presuming its
a screensaver or something.

I have removed the screen saver when root is logged in, but this
problem is actually at the XDM login screen, not when root is logged
in.

Any help is welcome removing this problem!

Thanks,

Andrew McCall

andrew.mccall@gmail.com (Andrew McCall) writes in comp.sys.sun.admin:
|I have three newly installed servers that if left idle their processor
|usage shoots up to 49% as can be seen from this prstat:
|
|PID USERNAME SIZE RSS STATE PRI NICE TIME CPU PROCESS/NLWP
|627 root 77M 7512K cpu2 10 0 3:45:00 49% Xsun/1
|19458 root 4560K 4232K cpu0 49 0 0:00:00 0.0% prstat/1
|
|...(load of other stuff cut out!)
|
|Total: 51 processes, 161 lwps, load averages: 1.27, 1.31, 1.33
|
|I have tried to track down whats causing this, but can't work it out!
|If I actually go to the server and move the mouse or press a key the
|XDM screen appears and the processor usage drops so I am presuming its
|a screensaver or something.
|
|I have removed the screen saver when root is logged in, but this
|problem is actually at the XDM login screen, not when root is logged
|in.

Check your Xsun and frame buffer driver patches. There have been a
couple of bugs that caused the system to eat CPU when activating power
management that have been fixed in those patches.

--
__________________________________________________ ______________________
Alan Coopersmith * alanc@alum.calberkeley.org * Alan.Coopersmith@Sun.COM
http://www.csua.berkeley.edu/~alanc/ * http://blogs.sun.com/alanc/
Working for, but definitely not speaking for, Sun Microsystems, Inc.

Andrew McCall <andrew.mccall@gmail.com> wrote:
> I have three newly installed servers that if left idle their processor
> usage shoots up to 49% as can be seen from this prstat:

Patch! If you haven't already put on the latest relevant recommended
cluster, and then the patches for your frame buffer. There's been a few
differnet bugs in the past few years which cause similar symptoms.

eg, if you've got an XVR-100 then it's probably
4910095 XVR-100 uses 100% cpu when at dtgreet screen with fbpm enabled
which is fixed in 114538-26.

(100% on a single proc, I'm guessing you've got 2)

Scott