topic HyperThreading/Linux in Operating System - Linux

HyperThreading/Linux

Benoît — Fri, 14 Apr 2006 08:17:27 GMT

Hi,

Are there known problem with DL380 and Linux that would need to unable hyperthreading?
What are recommandation on hyperthreading and Linux? ServiceGuard? Oracle? Apache?

Thanks.

Re: HyperThreading/Linux

Steven E. Protter — Fri, 14 Apr 2006 08:27:46 GMT

Shalom,

Hyperthreading on recent DL380's is enabled by default in the BIOS.

Bascially one regular core chip appears to the system as two. This enables you to use the smpt kernel and obtain a 60% performance boost.

Linux will recognize this as a dual cpu system. It can be used with SG, Oracle or Apache. I'm doing this on several servers now.

SEP

Re: HyperThreading/Linux

Benoît — Fri, 14 Apr 2006 08:30:36 GMT

About SMP kernel ... is it installed by default on these platform if hyperthreading is enabled or do you have to enable it?

Re: HyperThreading/Linux

Vitaly Karasik_1 — Fri, 14 Apr 2006 09:11:22 GMT

If hyperthreading was enabled during installation, installer should install smp kernel.