Ingo Molnar wrote:
Subject: [patch] sys_time() speedup
From: Ingo Molnar <[email protected]>
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.
Cheers
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