Messages in this thread |  | | Date | Thu, 31 Oct 1996 10:41:49 +0100 (MET) | From | Ingo Molnar <> | Subject | Re: time warps, I despair |
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On Thu, 31 Oct 1996, Ulrich Windl wrote:
> So what's the effect? From time to time the clock offset jumps for > some amount always less or equal to what's worth one tick (i.e. > offset jumps around from -5ms to 5ms when synchronized). To thos who > might get an idea when they see the pattern, I put two files on a FTP > server (pcphy4.physik.uni-regensburg.de):
i think my previous post wasnt exact enough:
... >anomalies< might happen in 2.0. Note the comment in time.c:
/* * Fast hack to avoid time warps if calling do_gettimeofday() from an * interrupt handler. A better solution will be done in 2.1 */
this means an ugly detection is done in gettimeofday that prevents time warps (but not anomalies).
- from user space no anomalies and no time warps should happen, in 2.0. - from an interrupt handler, anomalies might happen, to be fixed in 2.1
-- mingo
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