[fpc-devel] Parallel Computing
florian at freepascal.org
Mon Nov 3 16:41:01 CET 2008
Michael Schnell schrieb:
>> For a big vector operation the number of used threads should be
>> adapted to the memory architecture,
> With the C #pragma opm_.... this can be done statically by the
> programmer using the "schedule" keyword, defining "chunks" (there seem
> to be more sophisticated ways using the "static" "dynamic" and "guided"
> keywords, but I am in no way an expert on this
>> for computational intensive
>> applications like Mandelbrot the number of threads must be adapted to
>> the number of available virtual cores.
> With the C #pragma opm_.... this is done automatically ("dynamic"). The
> OpenMP library seems to do this and assign the loop runs to the threads.
> This seems to be the default behavior.
I looked into this and it doesn't offer anything sophisticated what
cannot be done by simple classes and doesn't solve the real problems of
MT like syncing.
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