[Beowulf] Opinions of Hyper-threading?

Jon Forrest jlforrest at berkeley.edu
Wed Feb 13 09:58:09 PST 2008

I inherited a cluster containing a bunch
of Xeon-based compute nodes. The compute
nodes were configured with hyper-threading
turned on. I'm wondering what you HPC cluster
people think of hyper-threading. I haven't
heard much about it recently since most
modern processors are true multi-core.

The main thing I'd like to know is whether
hyper-threading can do any harm when cpu
bound jobs are run.

Jon Forrest
Research Computing Support
College of Chemistry
173 Tan Hall
University of California Berkeley
Berkeley, CA
jlforrest at berkeley.edu

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