Hyperthreading in P4 Xeon (question)

Steven Timm timm at fnal.gov
Wed Apr 3 06:27:42 PST 2002

I have one such test machine that we are evaluating at the moment.
It's a dual cpu machine but under Linux it shows up looking like it
has four cpu's.  Haven't actually tried yet to see if it really can
run four loads just as well... the specimen we have has DDR SDRAM
and already gets bogged down going with two processes at once.

Steve Timm

Steven C. Timm (630) 840-8525  timm at fnal.gov  http://home.fnal.gov/~timm/
Fermilab Computing Division/Operating Systems Support
Scientific Computing Support Group--Computing Farms Operations

On Wed, 3 Apr 2002, William Park wrote:

> What is the realistic effect of "hyperthreading" in P4 Xeon?  I'm not
> versed in the latest CPU trends.  Does it mean that dual-P4Xeon will
> behave like 4-way SMP?
> --
> William Park, Open Geometry Consulting, <opengeometry at yahoo.ca>
> 8 CPU cluster, NAS, (Slackware) Linux, Python, LaTeX, Vim, Mutt, Tin
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