Re: sending UDP frames at a fixed rate
PaulH wrote:
I have an application where I would like to send UDP frames at a fixed
rate. (for example, 200 byte frames at 50 frames per second.)
But, using the example above, I may only get 320 frames sent in 10
seconds instead of the 500 I would expect.
I've put GetTickCount()s around the sendto() function to see if that
was taking longer than I would expect, but it always says 0 ms.
[..]
::WaitForSingleObject( hTimer, period );
}
This may not be relevant, and you're free to ignore it, but a some
point I found that 'WaitForSingleObject' had a granularity of the OS
scheduler, and the object is not signaled at the time of the call,
the system will force you to wait the whole number of slices (it can
be different on your system, on mine it was aroud 18 ms).
It seems that you're trying to treat MS Windows like a real-time OS,
which of course it isn't.
I've seen suggestions on installing (I may be wrong here, I'm "playing
from memory") or activating a different scheduler, which can speed up
the response of the system but slow it down overall due to increased
number of context switches, etc.
Of course it's entirely possible that I'm talking out of my @$$.
V
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