You're right! I dropped the polling rate from 1000Hz to 500Hz, and the outliers went away (see below). But should I be satisfied with this? I'm kinda not. This mouse should be able to report at 1000Hz. What could be wrong?Originally Posted by HAGGARD
Well, those readings still are indicative of a problem somewhere in your system. My notebook spat out crap like that with every mouse, and mousing feels horribly swampy and imprecise on it. I bet it has to do with polling issues. If polls are missed the host will gather a load of counts during the next poll and that will make the tester think you covered a lot of ground in one reading.
Change USB ports, polling rate and observe your polling rate with mouserate.exe. You don't want your mouse in an external hub or USB 3.0 slot.
Quote:Originally Posted by cuad
Ok, I've managed to improve the results, but I haven't totally fixed all the problems. HPET was incorrectly set in my BIOS. I have a 64-bit OS, but HPET was set to 32-bit mode. I fixed that, and my results have improved..
I will get a result like this maybe 1/10 times.
Here's a summary of the things I tried:
- The first thing I did was undo the HIDUSBF stuff I did many years ago to use the WMO, but that had no effect.
- Next, I checked all my USB ports and tweaked power options, but that had no effect.
- Next, I checked for IRQ conflicts, but didn't really see any.
- Finally, changed HPET in BIOS
That one wrong result is completely normal, I get it too occasionally. IMHO nothing to worry about anymore.Originally Posted by thuNDa
i get this too with alot mice, i wonder if there is actually someone who get always clean results without some dots showing at unrealistic m/s from time to time.
You got it. Here is one spike on the velocity graph between 140ms and 150ms. On the interval graph, there's an aberration occurring at the same time.Originally Posted by povohat
I assume these inflated velocity values are due to incorrect poll timing. If this is true, they will not cause a spike on the xCount vs. Time graph. You will likely also see a distinctly lower value at the same time on the Interval vs. Time graph.