Messages in this thread | | | Date | Tue, 10 Sep 2013 17:10:09 -0400 | From | Theodore Ts'o <> | Subject | Re: [PATCH] /dev/random: Insufficient of entropy on many architectures |
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On Tue, Sep 10, 2013 at 01:46:21PM -0700, John Stultz wrote: > > We do read the clocksource fairly frequently though, so rather then > re-reading on each interrupt, could you instead re-use the points at > interrupt time where we already read the clocksource, like in > hrtimer_interrupt()?
How often is that time updated? Is there some documentation whree I can understand how this works? I confess to be pretty ignorant about the details of how our time keeping systems work inside Linux.
Same question for sched_clock(); what are its guarantees, both in terms of granularity and cost of overhead. Is there any comprehensive documentation that I should be reading?
Thanks,
- Ted
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