Re: Xeon on Linux
On Wed, 29 May 2002 06:18, Cameron Moore wrote:
> * pahud@pahud.net (Patrick Hsieh) [2002.05.28 22:28]:
> > How does Linux support Xeon CPU currently?
> > I am considering to use dual P-III 1G or single Xeon 2.2G architecture.
>
> Consider the following pages:
>
> http://www.intel.com/eBusiness/products/server/processor/
> http://www.intel.com/eBusiness/pdf/prod/server/xeon/wp020901.pdf
>
> According to that white paper, the Xeon's new "Hyper-Threading"
> technology that they're bragging about should show benefits without
> modifications to current apps, but they say the threading scheme makes a
But it requires modifications to the OS, modifications which (AFAIK) have not
been done for Linux (yet).
Also as has been previously noted multi-processing raises caching and locking
issues which will degrade system performance in some areas, and some
applications are incapable of taking advantage of SMP.
As a general rule 2*1GHz processors will deliver less performance than 1*2GHz
processor even if the applications can take advantage of SMP!
Also it appears from Intel's web site that a processor designed for non-SMP
use can be obtained at a higher clock rate than an SMP capable processor...
I don't think that 2 CPUs is a benefit. If you've got an option of 4+ CPUs
then it may be worth having though.
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