On Thu, Jun 24, 2004 at 09:15:13PM -0400, Yaron Minsky wrote:
>One important thing is if you're not going to put 4 processors per
>node (which isn't worth it in my experience), then turn hyperthreading
>off. If you don't, then depending on the scheduler you may get two
definitely.
If changing HT settings in BIOS on a whole cluster doesn't appeal, then
with oldish 2.4 kernels (< 2.4.22?) the 'noht' boot option works, and
with new 2.6 kernels 'maxcpus=2' is the boot option.
for kernels in between, compiling with CONFIG_NR_CPUS=2 most likely
will work (but you should test it).
cheers,
robin
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