Messages in this thread |  | | Subject | Re: do_gettimeofday vs. rdtsc in the scheduler | From | Alan Cox <> | Date | 17 Sep 2002 22:28:12 +0100 |
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On Tue, 2002-09-17 at 21:54, David S. Miller wrote: > The cpu gets a bus clock input, so the system tick should be processor > local as much as TSC is. > > It's boggling that this is being messed up so much. I can't believe > Sun got something incredibly right (Ultra-III has a system tick) :-)
A bus clock - but things like the x440 have more than one bus clock. Its NUMA. Also the bus clock and rdtsc clock are different - rdtsc is dependant on the multiplier. Shove a celeron 300 and a celeron 450 in a BP6 board with tsc on and enjoy
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