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Re: N class cpu missing..

 
Anil_8
Occasional Advisor

N class cpu missing..

Hello...
We have an N Class server with 8 CPU's running HP-UX 11.0, Today I checked the top processes and found out only 7 CPU's (no 0 to 6) are busy with processes running. The 8th CPU is missing.

I also checked with STM.. it was also listing only 7 CPU's.. Is my CPU dead? How do I check? The System presently is running and doing some number crunching and I cannot shutdown for another week! Pls give ur valuable suggestions!
8 REPLIES 8
John Carr_2
Honored Contributor

Re: N class cpu missing..

Hi

have you checked the error log file for indication of faied processor.

/var/adm/syslog/syslog.log

also

dmesg | more

also

ioscan -fnCprocessor ( this will list all processors active or inactive )

cheers
John.
Tom Geudens
Honored Contributor

Re: N class cpu missing..

Hi,
To check the number of running processors you could use :
root/sv00154#echo "runningprocs/D" | adb -k /stand/vmunix /dev/mem
runningprocs:
runningprocs: 8
Alternatively, check in glance (CPU by processor).

Check the logs in GSP (SL command).

Oh, b.t.w. are you using ICOD CPU's ? If so, have all of them been activated ?

Hope this helps you determine the problem,
Tom
A life ? Cool ! Where can I download one of those from ?
Anil_8
Occasional Advisor

Re: N class cpu missing..

Thanks to John & Tom..
The ioscan, runningprocs commands shows only 7 CPU's..
The GSP log has one particular entry having 1 processor as timeout.. Also there is a difference between the no of processors claimed in the syslog.log and oldsyslog files.. now Im certain that 1 CPU is having some genuine problem..

I could like to know how to physically identify the particular faulty one? Any Inputs?
Vincent Farrugia
Honored Contributor

Re: N class cpu missing..

Hello,

N Class CPUs handles LPMCs better than the K-Class or D-Class. If 1 CPU exhibits 3 LPMCs in 24 hours, that CPU is not used anymore. It is shown in ioscan, but with the "top" command, it can be verified that the CPU is idle.

Replace the CPU which "top" says it is idle.

HTH,
Vince
Tape Drives RULE!!!
Zeev Schultz
Honored Contributor

Re: N class cpu missing..

This requires system shutdown though...

Go to BCH (boot menue) if you can,
MainMenue->Information->PR and observe
the 'Processor State',it can be either 'Active'
or 'Stopped:Nonresponding'.

Also advised to run there (under Main->Info)
FV - firmware version and write it down.

Also nice thing is to use STM's logtool utility
(in stm,before checking specific hardware go
to 'tools'->'utility'->'run'->'logtool')It will
format log of events monitored by stm daemon,which should include cpu problems).Of course,in case that cpu got lost after reboot.

good luck
So computers don't think yet. At least not chess computers. - Seymour Cray
Stefan Stechemesser
Honored Contributor

Re: N class cpu missing..

Anil,

you can check online with the GSP comman "ss" which processors are configured.
The output normally looks like:

GSP> ss


SS

System Processor Status:

Monarch Processor: 0

Processor 0 is : Installed and Configured
Processor 1 is : Installed and Configured
Processor 2 is : Installed and Configured
Processor 3 is : Installed and Configured
Processor 4 is : Installed and Configured
Processor 5 is : Installed and Configured
Processor 6 is : Installed and Configured
Processor 7 is : Installed and Configured

Best regards

Stefan Stechemesser
MANOJ SRIVASTAVA
Honored Contributor

Re: N class cpu missing..

Hi Anil

If your dmesg is running fine then you can just do a dmesg | grep Proc | wc -l and that will give the no. of processor which are being sensed and are working . One more way is to go to SAM--->Performance Monitoring ----> system Properties .I think that you are counting the last cpu as no 7 where as the cpu's start form 0 and not 1.



Manoj Srivastava
Sandip Ghosh
Honored Contributor

Re: N class cpu missing..

Anil,

Login to GSP and see whether it creates any errolog on GSP. After logging to GSP give SL for System Log , then E for error log. And accordingly inform HP for CPU replacement.

Sandip
Good Luck!!!