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Hi,
Im away to do a IOCP TCP application. I
read that its recommended to only have the NumberOfConcurrentThread parameter
within the CreateIOCompletionPort(..) to 0, informing the system to allow as
many threads as there are processors in the system. Does this mean that I can
only have same number of worker threads that are processors? Or does it mean
that the operating system only creates itself, these number of threads to deal
with the IOCP before the worker threads are passed the info.?
I am then going to create working threads
to service the IOCP. Within my application service routines, there will
be database activities, so I was going to create 4 working threads, hopefully
to get good throughput speed. Is this a feesable thing to do? or is it better
to only have 1 worker thread per processor too?
IIRC the recommended number was 2 * CPU count. You can
get away with any number (including 0 which gives the control to the OS)
but 2 * CPU count must give you the best performance. There are
several decent articles in the MSDN on this topic. Search for "I/O
Completion Ports".
Behold the believers of all beliefs! Whom do
they hate most? The man who breaks up their tables of values, the breaker,
the law-breaker - yet he is the creator.
-Thus Spoke Zarathustra, F. W.
Nietzsche |
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