question about Intel P4 versus Alpha's
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Nathan Fredrickson 8nrf at qlink.queensu.caFri Jan 10 09:15:00 PST 2003
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Daniel Kidger wrote: > > In general, people prefer to switch off hyperthreading for HPC clusters, > either via a BIOS option, or by passing 'noht' to the kernel (in say > grub.conf). > Why is HT off preferred for HPC clusters? I know it is beneficial to disable HT until you upgrade to a kernel that has an HT aware scheduler (either a patch to 2.4.19 or the upcoming O1 scheduler in 2.5). Is that the reason here, or is there another reason to not use HT in a HPC cluster? Nathan
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