Hi all, I have a question this week about thread priority, the little python application I am writing is CPU bound (on my crappy old machine).
I have split the application into threads (using threading) which appears to work OK, but the application is still responding at the speed of the slowest thread. The app is a video processing/display, I have: -- Main Thread: pyGTK display/buttons. Capture Thread: grab from V4L2 and render onto display. Process Thread: grab image from Capture thread and process, processing is done using a wrapper to C library. -- The video display framerate drops to that of the processing thread and the CPU is pegged at 100%. If I disable the processing thread then the video is smooth, with the correct framerate and CPU is mostly idle. If I put a large sleep (5s for example) in the processing thread I get slow video (whilst processing) and then smooth video (whilst sleeping), so I believe that I have done the threading correctly. So my questions are: Is there a way to lower the priority of the 'Process Thread' so that it does not run as intensively? Or, is there a way to increase the rate at which the 'Process Thread' is swapped out and thus allowing the other (less intensive) threads to get CPU time? Cheers, Simon. _______________________________________________ clug-talk mailing list [email protected] http://clug.ca/mailman/listinfo/clug-talk_clug.ca Mailing List Guidelines (http://clug.ca/ml_guidelines.php) **Please remove these lines when replying
