Messages in this thread | | | Subject | Re: Not all logical processors activated on Dual Core Xeon (== no Hyperthreading) | From | Andi Kleen <> | Date | Wed, 09 Jan 2008 16:25:50 +0100 |
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VUB Stefan Seidel <sseidel@vub.de> writes:
> I have the following system here: two dual-core Xeon 5130 on an Intel > S5000V-SA motherboard. The kernel detects 4 CPUs, from what I learn > through /proc/cpuinfo, these are the 4 cores (two per > package). However, I think it should be 8 logical processors, because > the Xeons should be able to do Hyperthreading (or
Core2 Duo based Xeons do not support Hyper Threading.
> =========================== > but acpidump shows 8 CPUs in multiple locations:
That's likely because the BIOS supports Quad Core CPUs, but does not disable the excessive objects if you only plug in Dual Core
-Andi
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