On Tue, Sep 01, 2015 at 11:36:38AM +0300, Adrian Hunter wrote: > On 21/08/15 12:05, Adrian Hunter wrote: > > When TSC is stable perf/sched clock is based on it. > > However the conversion from cycles to nanoseconds > > is not as accurate as it could be. Because > > CYC2NS_SCALE_FACTOR is 10, the accuracy is +/- 1/2048 > > > > The change is to calculate the maximum shift that > > results in a multiplier that is still a 32-bit number. > > For example all frequencies over 1 GHz will have > > a shift of 32, making the accuracy of the conversion > > +/- 1/(2^33). That is achieved by using the > > 'clocks_calc_mult_shift()' function. > > > > Signed-off-by: Adrian Hunter <[email protected]> > > Ping?
I've queued it. Thanks -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
