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Things that PsychoPy will automatically attempt to do on your behalf (as of v1.50.00 unless stated):
all systems: PsychoPy was built very much around the use of optimised hardware-accelerated graphics. The graphics card is made to do as much as possible, leaving the cpu relatively free
- win32:
- The priority of the experiment thread is raised with SetPriorityClass and SetThreadPriority.
- Syncing to the VBI is enabled where possible, but this may not be allowed by some graphics cards (e.g. Intel integrated graphics chips) and may have been forced off in the control panel of other cards (check in the advanced panel of your display properties for vsync).
- OS X:
- The priority of the thread is raised with mach/thread_policy_set
- VBI syncing and VBI blocking are both achieved on all systems by measuring the current beam position of the monitor
- Linux:
- The priority of the thread is set to SCHED_RR using sched_setscheduler, but this only operates if the user runs the script with su permissions.
- At the time of writing I’m (Jon) not sure about whether or not linux systems block on win.flip()
