On Thu, 2017-03-23 at 14:37 -0700, Alexander Duyck wrote: > From: Alexander Duyck <alexander.h.duyck@xxxxxxxxx> > > The last bit I changed is to move from using a shift by 10 to just using > NSEC_PER_USEC and using multiplication for any run time calculations and > division for a few compile time ones. This should be more accurate and > perform about the same on most architectures since modern CPUs typically > handle multiplication without too much overhead. busy polling thread can be preempted for more than 2 seconds. Using usec instead of nanoseconds gave us 3 orders of magnitude cushion. We do not need nsec accuracy for busy polling users, if this restricts range and usability under stress. -- To unsubscribe from this list: send the line "unsubscribe linux-api" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
