On 26/07/17 00:31, Evan Burness wrote: > If I recall correctly, IBM did just what you're describing with the > BlueGene CPUs. I believe those were 18-core parts, with 2 of the cores > being reserved to run the OS and as a buffer against jitter. That left a > nice, neat power-of-2 amount of cores for compute tasks.
Close, but the 18 cores were for yield, with 1 core of running the Compute Node Kernel (CNK) and 16 cores for the task that the CNK would launch. The 18th was inaccessible. But yes, I think SGI (RIP) pioneered this on Intel with their Altix systems and was the reason they wrote the original cpuset code in the Linux kernel so they could constrain a set of cores for the boot services and the rest were there to run jobs on. All the best, Chris -- Christopher Samuel Senior Systems Administrator Melbourne Bioinformatics - The University of Melbourne Email: sam...@unimelb.edu.au Phone: +61 (0)3 903 55545 _______________________________________________ Beowulf mailing list, Beowulf@beowulf.org sponsored by Penguin Computing To change your subscription (digest mode or unsubscribe) visit http://www.beowulf.org/mailman/listinfo/beowulf
