Messages in this thread | | | Date | Sat, 17 Aug 2002 17:55:17 -0700 | From | Larry McVoy <> | Subject | Re: Does Solaris really scale this well? |
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On Sun, Aug 18, 2002 at 12:03:24AM +0100, Ruth Ivimey-Cook wrote: > >> "When you take a 99-way UltraSPARC III machine and add a 100th processor, > >> you get 94 percent linear scalability. You can't get 94 percent linear > >> scalability on your first Intel chip. It's very, very hard to do, and they > >> have not done it." > > I've seen scientific reports of scalability that good in non-shared memory > computers (mostly in transputer arrays) where (with a scalable algorithm) > unless you got >90% you were doing something wrong. However, if you insist on > sharing main memory, I still don't believe you can get anywhere near that... > IMO 30% is doing very well once past the first few CPUs.
Please reconsider your opinion. Both Sun and SGI scale past 100 CPUs on reasonable workloads in shared memory. Where "reasonable" != easy to do. -- --- Larry McVoy lm at bitmover.com http://www.bitmover.com/lm - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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