On Mon, 10 Jul, 2006 at 12:39PM -0400, Dave Robillard spake thus: > > > > [EMAIL PROTECTED] wrote: > > > >Howdy peeps. > > > >Not really much of a release, so not much fanfare, but in the > >interests of sharing effort I give you... > > > >Powernap! > > > >http://dis-dot-dat.net/?item=code/powernap/ > > > >If, like me, you need to drive an app from a Python interface, > >powernap can help. It's a small extension that switches to the > >real-time scheduler and provides two handy sleep-like functions: > > > >nap() naps for a given number of milliseconds, timed with the RTC > > > >rnap() is a "rolling nap" that tries to make the time between calls > >the given number of milliseconds. A padding nap, if you will. > > > >It works for me and it might come in handy for someone else. > > Nice, this will definitely come in handy for me.
Good! I'm trying to see where I'm writing things that others can make use of and make them fairly simple to reuse. > Have you done any benchmarking on what kind of timing precision you can > get? Nothing particularly concrete. On my amd64 3700 sandiego, with other apps running (normal desktop kinda stuff), aiming for a time between sleeps of 310ms using rnap, I get a minimum gap of 308.34 and a maximum of 312.48, so the range is about 5ms. Standard deviation is 0.67, though and the average is 310.4. Which is quite good, from Python, I think. I think there might be a way for it to automatically compensate over time for tending to be a little over, but 0.4ms probably isn't worth it. James > -DR- >
