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Hyperthreaded CPUs, W2k and SQL Server 2K


Xeon hyperthreaded CPUs show up as two CPUs in the cpuinfo file.

So a dual Xeon machine appears as a quad processor.

In Windows, it's the same thing.

A dual Xeon will have 4 CPU charts showing in the Task Manager cpu chart.

Ok, then question.

Suppose, a quad Xeon is running W2K Server. Should the OS show 8 CPUs? It
doesn't. It shows four.

What does this mean?

Is w2k not taking advantage of the virtual 8 CPUs?

Is it, in fact, running sub-optimally ( that is, is w2k not designed for 8
CPUs so it runs sluggishly, or throws errors ) ?

Same for SQL Server 2000, Standard Edition. What is the effect of running
it on a quad Xeon machine ?

--
W '04 <:> Open
Jul 21 '05 #1
1 1247

"Canneloni" <ja*****@earthl ink.net> wrote in message
news:9d******** *********@newsr ead1.news.pas.e arthlink.net...

Xeon hyperthreaded CPUs show up as two CPUs in the cpuinfo file.

So a dual Xeon machine appears as a quad processor.

In Windows, it's the same thing.

A dual Xeon will have 4 CPU charts showing in the Task Manager cpu chart.

Ok, then question.

Suppose, a quad Xeon is running W2K Server. Should the OS show 8 CPUs?
It
doesn't. It shows four.

What does this mean?

Is w2k not taking advantage of the virtual 8 CPUs?

Is it, in fact, running sub-optimally ( that is, is w2k not designed for 8
CPUs so it runs sluggishly, or throws errors ) ?

Same for SQL Server 2000, Standard Edition. What is the effect of running
it on a quad Xeon machine ?

--
W '04 <:> Open

Jul 21 '05 #2

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