At Thursday 3/8/2006 22:45, Ray Schumacher wrote:
I have been trying to use sleep() and
kernel32.QueryPerformanceCounter together; I want to delay until a
particular tick without trying up the CPU badly.
However, while time.sleep(.001) relieves the CPU, it has wildly
unpredictable delay, and sleep(.0001) delays almost nothing at all!
(I'm watching the parallel port on a scope).
If I use a while and just count ticks with
QueryPerformanceCounter(), it is very stable and as desired - but it
uses 100% CPU.
I'm not sure if this really works, but you could try:
- Raise your thread/process's priority using SetPriorityClass or
SetThreadPriority. This is to minimize the (unpredictable) delay of sleep()
- Keep your qPC loop, but insert a sleep(0) call, this would free the CPU.
Gabriel Genellina
Softlab SRL
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