Why does Ubuntu 12.10 only see 8 cores?

Posted by tunnuz on Ask Ubuntu See other posts from Ask Ubuntu or by tunnuz
Published on 2012-10-29T15:57:38Z Indexed on 2012/11/01 5:17 UTC
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In our lab we just bought a new machine with two 8-cores Intel(R) Xeon(R) CPU E5-2660 0 @ 2.20GHz processors which also support Hyper-Threading.

I would expect Ubuntu to see 32 processing units, however it only detects 8 of them (the equivalent of just one processor with Hyper-Threading disabled). The bios correctly reports a total of 32 processing units. I am using Ubuntu 12.10 desktop 32 bit.

Any idea about how to solve this?

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Developer IT

Why does Ubuntu 12.10 only see 8 cores? - Developer IT

Why does Ubuntu 12.10 only see 8 cores?

multi-core

Related posts about multi-core

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Multicore Chips Require OS Rework, Windows Architect Advises

Multicore Chips Require OS Rework, Windows Architect Advises

In a multithreaded app, would a multi-core or multiprocessor arrangement be better?

Multi core processors... are they really needed?

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