On Fri, Mar 27, 2009 at 1:31 PM, Poul-Henning Kamp <phk_at_phk.freebsd.dk> wrote: > In message <49CD0405.1060704_at_samsco.org>, Scott Long writes: > >>I've been talking about this for years. All I need is help with the VM >>magic to create the page on fork. I also want two pages, one global >>for gettimeofday (and any other global data we can think of) and one >>per-process for static data like getpid/getgid. > > Agreed, that is a good place to start. I'm assuming folks are still in love with the TSC because it still the cheapest as oppose ACPI-fast or HPET to even contemplate this? Also I thought at least PHK's comment (Sergey mentioned it) was true regardless of bus, that the TSC is not consistent across multiple packages (and for that matter I suppose cores) due to I *think* its ISA lineage so how does this work again? Won't the rate in which you tick up be sporadic over the course of the process scheduled on different cores? (i.e. depending on what core RDTSC happened to land on) -apsReceived on Fri Mar 27 2009 - 17:46:47 UTC
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