Messages in this thread | | | From | Arnd Bergmann <> | Subject | Re: [RFC] [Patch 7/8] statistics infrastructure - exploitation prerequisite | Date | Wed, 17 May 2006 01:03:08 +0200 |
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Am Wednesday 17 May 2006 00:36 schrieb Martin Peschke: > Any other hints on how to replace my sched_clock() calls are welcome. > (I want to measure elapsed times in units that are understandable to > users without hardware manuals and calculator, such as milliseconds.)
There are a number of APIs that allow you to get the time:
- do_gettimeofday potentially slow, reliable TOD clock, microsecond resolution - ktime_get_ts monotonic clock, nanosecond resolution - getnstimeofday reliable, nanosecond TOD clock - xtime jiffie accurate TOD clock, with fast reads - xtime + wall_to_monotonic jiffie accurate monotonic clock, almost as fast - get_cycles highest supported resolution and accuracy, highly HW-specific behaviour, may overflow.
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