Messages in this thread | | | Date | Wed, 26 Jul 2006 09:08:46 -0700 | From | "john stultz" <> | Subject | Re: gettimeofday(), clock_gettime(), timer_gettime() |
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On 7/25/06, John Richard Moser <nigelenki@comcast.net> wrote: > I'm looking through a few things and noticing some complaints about time > and performance. Briefly, the following things have come to my attention: > > - gettimeofday() is slow, or so they say, needing several milliseconds > to execute.
No. At worse its several microseconds (PIT takes about 18us, and its terrible!). More likely you'll see ~1us using ACPI PM or HPET or ~500-100ns (depending on your system). With vsyscall it can get into the sub 100ns range.
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