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From: Jack on 21 Apr 2010 23:32
Dear all,
As my game application require more than 12 mobile units to do pathfinding
at the same time, I wonder if I implement a thread pool (and that means to
use
a task queue for awaiting tasks) for those objects, would that really affect
the overall performance
of the application? ( I mean some objects would wait for their turns and
standing still for a couple of minutes)
And are there any good examples to demostrate how to use a thread pool? I
looked codeguru and code project
and I want some more examples.
Thanks
Jack



From: Jack on 21 Apr 2010 23:49
Also if contrarly, If I implement 12 independent threads for each object.
Would that be too insane and totally bog down for a single core CPU?
Thanks
Jack



From: Faisal on 22 Apr 2010 08:04

From Win2000 onwards windows provides thread pool
http://msdn.microsoft.com/en-us/library/ms686760%28VS.85%29.aspx

Note that these APIs have undergone some significant changes in
Windows Vista.

If you are trying implement thread pool by your own, use the concept
of IO completion ports. You can create a number of threads( better a
number slightly bigger than your number of CPUs) and let all these
threads wait on IOCP using GetQueuedCompletionStatus(). When a task is
to be done, queue a request to IOCP using
PostQueuedCompletionStatus(). On this one thread from the pool will
wake up from wait and you can do the job there. You would have to
device an appropriate data structure to queue requests.

Fellow MVP Dr. Newcomer has some excelent article on IOCP in his site.
http://www.flounder.com/mvp_tips.htm
From: Jack on 22 Apr 2010 08:29
Hi Faisal,
Lots of thanks for the links. Now I am digging into them....
Jack



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