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32 lines
1.1 KiB
TeX
32 lines
1.1 KiB
TeX
\pagebreak
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\section{Interaction Between the \code{num\_threads} Clause and \code{omp\_set\_dynamic}}
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\label{sec:nthrs_dynamic}
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The following example demonstrates the \code{num\_threads} clause and the effect
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of the \\
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\code{omp\_set\_dynamic} routine on it.
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The call to the \code{omp\_set\_dynamic} routine with argument \code{0} in
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C/C++, or \code{.FALSE.} in Fortran, disables the dynamic adjustment of the number
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of threads in OpenMP implementations that support it. In this case, 10 threads
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are provided. Note that in case of an error the OpenMP implementation is free to
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abort the program or to supply any number of threads available.
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\cexample{nthrs_dynamic}{1}
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\fexample{nthrs_dynamic}{1}
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\pagebreak
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The call to the \code{omp\_set\_dynamic} routine with a non-zero argument in
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C/C++, or \code{.TRUE.} in Fortran, allows the OpenMP implementation to choose
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any number of threads between 1 and 10.
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\cexample{nthrs_dynamic}{2}
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\fexample{nthrs_dynamic}{2}
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It is good practice to set the \plc{dyn-var} ICV explicitly by calling the \code{omp\_set\_dynamic}
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routine, as its default setting is implementation defined.
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