Messages in this thread | | | Date | Mon, 25 Jun 2007 20:22:39 -0400 | From | Mark Lord <> | Subject | Re: [patch, v2.6.22-rc6] sys_time() speedup |
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Ingo Molnar wrote: > Subject: [patch] sys_time() speedup > From: Ingo Molnar <mingo@elte.hu> > > improve performance of sys_time(). sys_time() returns time in seconds, > but it does so by calling do_gettimeofday() and then returning the > tv_sec portion of the GTOD time. But the data structure "xtime", which > is updated by every timer/scheduler tick, already offers HZ granularity > time.
How well synchronized is xtime with real-time ?
Programs invoking sys_time() do expect it to be as accurate as gettimeofday(), even if only at 1-second boundaries.
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