Le 16/01/2014 06:03, Kevin Fishburne a écrit : > > The results are in, and they don't tell me much. :( I attached the > updated test project, which includes the test results in comments at the > top. They are: > > ' No Stop Event | No Geometry | Binary NVIDIA driver | 236 FPS > ' Stop Event | No Geometry | Binary NVIDIA driver | 158 FPS > ' No Stop Event | No Geometry | Nouveau driver | 238 FPS > ' Stop Event | No Geometry | Nouveau driver | 159 FPS > ' No Stop Event | Geometry | Binary NVIDIA driver | 236 FPS > ' Stop Event | Geometry | Binary NVIDIA driver | 155 FPS > ' No Stop Event | Geometry | Nouveau driver | 218 FPS > ' Stop Event | Geometry | Nouveau driver | 161 FPS > > Adding "Stop Event" reduces thread CPU usage from 100% to 84%. The frame > rate is consistently lower when using Stop Event. That 16% difference in > CPU also doesn't seem to correlate with the difference in frame rates, > as the frame rate difference has a significantly larger discrepancy. > Factors unknown to me could be contributing to that of course...
It's actually simple: when 'Stop Event' is used, the process is paused during a little delay (about 10 ms according to the SDL_Delay function documentation). So it acts as a frame rate limitation. If you don't use 'Stop Event', there is no such delay. But you get in both cases a call to the Gambas event loop with a 10 ms timeout (yes, 10 ms again. This is usually the smallest delay a Linux Kernel can handle). That means if there is no Gambas event to process, the process is paused during 10 ms. If there is a Gambas event to process, there is no pause. I will try to remove all this delays, and you will tell me if it helps you. -- Benoît Minisini ------------------------------------------------------------------------------ CenturyLink Cloud: The Leader in Enterprise Cloud Services. Learn Why More Businesses Are Choosing CenturyLink Cloud For Critical Workloads, Development Environments & Everything In Between. Get a Quote or Start a Free Trial Today. http://pubads.g.doubleclick.net/gampad/clk?id=119420431&iu=/4140/ostg.clktrk _______________________________________________ Gambas-user mailing list Gambas-user@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/gambas-user
