On Fri, 4 Feb 2005, Scott Long wrote:
With FreeBSD, it's a bit of a toss-up. There is no strong affinity set or enforced between process memory and where the process is running. Having some notion of affinity (i.e. NUMA support) would be a good thing. Oh, and the 4+2 configurations are typically pretty poor, regardless.
For non-NUMA-aware operating systems, you should turn on Node Interleaving for the memory system which will spread the memory accesses across all processors. Hopefully all multi-processor Opteron system BIOSes will give you this option, my Tyan S2885 does.
-- Chris Dillon - cdillon(at)wolves.k12.mo.us FreeBSD: The fastest, most open, and most stable OS on the planet - Available for IA32, IA64, AMD64, PC98, Alpha, and UltraSPARC architectures - PowerPC, ARM, MIPS, and S/390 under development - http://www.freebsd.org
Q: Because it reverses the logical flow of conversation. A: Why is putting a reply at the top of the message frowned upon?
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