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Re: [Xen-devel] Time went backwards

On Fri, 10 Mar 2006, Keir Fraser wrote:

> To that end, it would be interesting to see if after the first do-while 
> loop in timer_interrupt(), you can end up with sched_time > 
> (processed_system_time + delta).
> If so, we could end up running per-cpu processed_system_time ahead of 
> current system time and so get -ve delta the *next* time we run 
> timer_interrupt().

In my observations, delta is always positive.  It is cpu_delta
which goes negative.  I'll go count the cpu specific deltas and
will check to see if they are larger than the system wide delta.

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