topic Re: system process taking 100% cpu in Operating System - HP-UX

system process taking 100% cpu

Ra Jose — Fri, 04 May 2007 08:09:26 GMT

I have noticed this few times on HP-UX 11.23 (IA64). After 11.23 is installed, well into production for few months, I notice this one process cmenu started by init process. This is something related to SAM. Somehow it runs at high priority taking all cpu cycles (topmost cpu user, running all time).

Does anybody has noticed about this and what this is about?

Thanky you all.

Rajos

Re: system process taking 100% cpu

Mel Burslan — Fri, 04 May 2007 08:35:07 GMT

This is not a first hand knowledge as I do not have this problem on any of my itanium server here, but if my memory is still serving me good, cmenu was something related to perl, a library of sorts, supporting curses menu functions under perl.

If I were you, I would check the existence of a rogue perl application on my system.

My 2 cents.

Re: system process taking 100% cpu

Victor BERRIDGE — Fri, 04 May 2007 08:44:45 GMT

Hi,
look at this document:
Submitted Date: Mon Feb 06 07:00:00 CET 2006
Title: kernel config (char mode) fails from sam
Document ID: ucr_na-KMN8606431056_ssb-1
Last Modified Date: Sun Apr 08 07:00:00 CEST 2007

You may provide feedback on this document

Title:kernel config (char mode) fails from sam
Product Name: HPUX S800 1.0-11X
Product Number:9245XB
Release ID:B.11.23System Model:9000
Last Update Filed:20070330
Status:Fix Available

Problem Text

CR# JAGaf90498
problem
# sam --> kernel config (char mode)

Syntax Error
In /usr/sam/tui/kc/mainMenu at line 1
Unrecognized line:

Temporary Solution

TEXT
workaround
As a workaround, install SysMgmtBase B.00.02.01 from media with the
0512 OE. (Note: this will automatically pull in patches that require
a reboot.)

Fix Text

fix
kcweb now has a dependency on SysMgmtBase to ensure that the menufiles
are in sync with the cmenu shipped by SysMgmtBase.

Original KMine SSB-SRB 8606431056

All the best
Victor

Re: system process taking 100% cpu

Ra Jose — Fri, 04 May 2007 13:10:06 GMT

Thank you Victor. Looks like, I have the higher version of sys management. But still this problem happens. This happens, when one uses sam -> kernel config -> kernel config (char mode)
The above sequence starts the cmenu process. If, at this point, the sam process is killed and all other related processes killed except the cmenu, then cmenu becomes zombie and owned by init process. Then, this cmenu starts taking all of cpu cycles. If you do a top or look in glance, you will see all cpu going to 100%. Work around is to kill this cmenu process.
Rajos

Re: system process taking 100% cpu

Ra Jose — Fri, 04 May 2007 13:30:10 GMT

Please see my previous post in this thread.

Rajos

Re: system process taking 100% cpu

Sandman! — Fri, 04 May 2007 13:37:29 GMT

Does this error happen when you run the X windows/Motif version of SAM or when you use the character-based interface?

Re: system process taking 100% cpu

Ra Jose — Fri, 04 May 2007 13:39:22 GMT

It happens both ways. I tested using x-window based sam and was able to replicate the problem.
Rajos