Re: to hyperhread or not

From: Jeremy Schneider <>
Date: Wed, 30 Apr 2008 10:52:49 -0400
Message-ID: <>

Essentially hyperthreading just moves some of the task switching into the CPU hardware instead of OS code - in theory it saves you a few cycles and gives a small amount of speedup. As far as how effective it actually is, you might look for articles at places like cpuplanet, tomshardware, arstechnica, etc. Personally I've used it on many servers without any problems and don't see any reason not to use it.

I did some [very] basic testing awhile ago to see how linux's O(1) scheduler (in RHEL4) dealt with hyperthreading:


On 4/29/08, steve montgomerie <> wrote:
> Hello,
> Does anyone have an experiences/thoughts to share on hyperthreading?
> Our config is OEL 4.5 Oracle on DELL 2950's with two dual cores.
> It's currently
> turned off so Oracle is seeing 4 CPU's.
> Thanks
> Steve

Jeremy Schneider
Chicago, IL

Received on Wed Apr 30 2008 - 09:52:49 CDT

Original text of this message