Messages in this thread | | | Date | Wed, 28 Apr 2004 17:11:54 -0400 | From | Chris Friesen <> | Subject | Re: Low bogomips on IBM x445 (kernel 2.6.5) |
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john stultz wrote:
> This is expected. Since the IBM x440/x445 are NUMA systems, we cannot > use the TSC (cpu cycle counter) as a time source. Instead we use an off > chip performance counter which runs at 100Mhz. This then translates to a > bogoMIPS value of ~200.
That sounds very strange. Bogomips is supposed to be how many busy-wait loops the cpu can do in a second, or at least that's what I've seen in all the books. It shouldn't matter what the time source is.
I would expect a NUMA machine to have different bogomips values for the different CPUs, but the values should still be the same as if that cpu was on a uniprocessor system, no?
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