>>>>> On Fri, 30 Jul 2004 08:34:56 -0700 (PDT), Christoph Lameter <clameter@sgi.com> said: >> The numbers above indicate a substantial slowdown going from 1 to >> 2 cpus. What happens at higher cpu counts. Christoph> The code that uses cmpxchg will always be a scalability Christoph> issue. Also, you need to keep things in perspective: the test programs _continually_ bangs on gettimeofday(). If the cmpxchg were a scalability issue for, say, 16-32-way machines with _real_ workloads, I'd really be surprised. Now if you have 128 or more CPUs, I do agree that the picture would be very different and scalability is a much bigger concern. --david - To unsubscribe from this list: send the line "unsubscribe linux-ia64" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.htmlReceived on Mon Aug 2 05:36:29 2004
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