Deactivating one processor

[Michael Selvesteen_2]

Hello All,

I want to deactive one of the processor in my server for my product testing.

Am aware about grup in linux through which we can atleast control hyperthreading.. Is there any similar option in HP-UX ?

11.23 HP-UX IA is my environment. Any idea gurus ?

Advance thanks for your help.

[Devender Khatana]

Hi,

What is the hardware model?

Atleast I know for rx2600, you can disable it at EFI prompt.

HTH,
Devender

[Arunvijai_4]

Hi Michael,

In Solaris you can do it with "psradm" command.
In HP-UX, you have to login to MP and disable a processor or you can do it with STM.

Check this thread for more information,

http://forums1.itrc.hp.com/service/forums/questionanswer.do?threadId=969302

-Arun

[Sivakumar TS]

Hi Michael,

Once you get into the EFI shell,

Shell> cpuconfig [cpu] [on|off]

Regards,

Siva.

[Yogeeraj_1]

hi,

see also:
http://forums1.itrc.hp.com/service/forums/questionanswer.do?threadId=28825


kind regards
yogeeraj

[Sivakumar TS]

Hi,

You can get the list of CPUs enabled in the system just by entering
shell>cpuconfig in EFI shell.

You can also deactivate a CPU from STM ( support tool manager) from OS level,

Regards,

SIva

[rick jones]

You might also get acceptable results with a combination of psets and intctl. The cpuconfig from EFI is perhaps the most "certain" of them, if STM knows how to disable a CPU that should be pretty certain as well, athough since that is at run time, if there were any applications that had checked how many CPUs there were, and then did stuff based on that, it may not be quite the way to go.

What sort of product testing are you looking to do - make sure that the product does the right thing when a CPU is deactivated online, or scaling measurements?