Re: [SLE] irqbalance question on openSuSE 10.1

Randall R Schulz wrote:

On Wednesday 31 May 2006 07:16, Per Jessen wrote:

Hyperhreading is different - only one processor that pretends to do
more things at the same time :-)

The difference is more a matter of degree. In an HT CPU there is less
duplicated internal machinery. A dual-core CPU has two full CPUs that
operate largely independently. In the current dual-core chips, I
believe, there is a single, shared level-2 cache.

I've been thinking of getting a dual-core Pentium D for a new
workstation, and the specs I've seen all say 2 x 1Mb L2 cache. I
believ the two CPUs operate fully independently.

It seems HT CPUs were just a transitional state between older single
CPU chips and modern multi-core chips.

Hmm, that's stretching it a bit I think. The P4 Hyperthreading is AFAIK
an improved version of the Xeon <something>threading. The HT bit still
resides on the same die, whereas the dual-core has two dies.

I tend to think of a dual-core as simply two processors, nothing more,
nothing less. But a lot cheaper to buy and to run!



/Per Jessen, Zürich


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