Re: How to detect multi-core and/or HT-enabled CPUs in 2.4.x and 2.6.x kernels

From: Siddha, Suresh B
Date: Wed Dec 27 2006 - 15:32:31 EST

On Wed, Dec 27, 2006 at 09:52:02AM -0800, Martin Knoblauch wrote:
> For sizing purposes, doing benchmarks is the only way. For the purpose
> of Ganglia the sockets/cores/threads info is purely for inventory. And
> we are likely going to add the new information to our metrics.
> But - we still need to find a way to extract the infor :-)

Only the 2.4 x86_64 kernels are exporting limited info("physical id",
"siblings") through /proc/cpuinfo.

Some of the distos based on 2.4 kernels have the complete topology
(physical id, core id, cpu cores, siblings) exported through /proc/cpuinfo.

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