Re: [patch 0/3] [Announcement] Performance Counters for Linux

Peter Zijlstra
2008-12-05T08:03:56Z

On Fri, 2008-12-05 at 18:57 +1100, Paul Mackerras wrote:
> Peter Zijlstra writes:
>
> > So, while most people would not consider two consecutive read() ops to
> > be close or near the same time, due to preemption and such, that is
> > taken away by the fact that the counters are task local time based - so
> > preemption doesn't affect thing. Right?
>
> I'm sorry, I don't follow the argument here. What do you mean by
> "task local time based"?

time only flows when the task is running.