topic Re: Bl460c G6, conrep, linux - can't disable hyperthreading in BladeSystem - General

Bl460c G6, conrep, linux - can't disable hyperthreading

Heiner Billich — Tue, 03 Nov 2009 15:19:12 GMT

Hello,
I try to disable hyperthreading with conrep on a Bl460cG6 with Bios I24 07/25/2009. I use conrep version 2.20c on RHEL5. This does not work, albeit conrep seems to change the setting it's not active after the next reboot. Changes work for other settings like ASR timeout. I noticed that rbsu> does a "power cycle" when I change hyperthreading settings, do I need to do something special to make the changes permanent beside a simple reboot ?

Re: Bl460c G6, conrep, linux - can't disable hyperthreading

Uwe Zessin — Tue, 03 Nov 2009 16:21:13 GMT

Have you tried to change the setting with CONREP and then do a manual power cycle to see if CONREP can do that? If that works you could also force a power cycle through the iLO or OA scripting interfaces (sorry, don't know if one can do that from the OS).

Re: Bl460c G6, conrep, linux - can't disable hyperthreading

Heiner Billich — Tue, 03 Nov 2009 16:24:47 GMT

thanks !

I tried with linux
# reboot
and
# shutdown -h -y now
and even
ilo> power off
ilo> power on

I did not try to pull and reinsert the blade.

Re: Bl460c G6, conrep, linux - can't disable hyperthreading

Johan Huysmans — Thu, 29 Jul 2010 09:00:10 GMT

Hi,

I have the same problem. When enabling or disabling the config the change appears whenever I do a conrep -s.

But when performing a reboot or poweroff/poweron it doesn't change the amount of cpu's

Re: Bl460c G6, conrep, linux - can't disable hyperthreading

rigsc — Thu, 07 Feb 2013 14:18:45 GMT

I noticed the same issue. Run conrep, reboot, HT is still enabled (I've actually had it enable itself on systems where it previously disabled), reboot again and then it's disabled. I haven't tried a third reboot to see if it comes back.