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On Fri, 24 Aug 2007, john stultz wrote:
> >
> > - /* calculate the delta since the last update_wall_time: */
> > - cycle_delta = (cycle_now - clock->cycle_last) & clock->mask;
> > + } while (cycle_raw != clock->cycle_raw ||
> > +cycle_last != clock->cycle_last);
>
> So if I'
On Fri, 2007-08-24 at 13:57 -0400, Steven Rostedt wrote:
> The latency tracer on SMP was given crazy results. It was found that the
> get_monotonic_cycles that it uses was not returning a monotonic counter.
> The cause of this was that clock->cycles_raw and clock->cycles_last can
> be updated on an
The latency tracer on SMP was given crazy results. It was found that the
get_monotonic_cycles that it uses was not returning a monotonic counter.
The cause of this was that clock->cycles_raw and clock->cycles_last can
be updated on another CPU and make the cycles_now variable out-of-date.
So the de
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