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omp_get_wtime

Returns a value in seconds of the time elapsed from some point.

double omp_get_wtime( );

Return Value

Returns a value in seconds of the time elapsed from some arbitrary, but consistent point.

Remarks

That point will remain consistent during program execution, making subsequent comparisons possible.

For more information, see 3.3.1 omp_get_wtime Function.

Example

// omp_get_wtime.cpp
// compile with: /openmp
#include "omp.h"
#include <stdio.h>
#include <windows.h>

int main() {
    double start = omp_get_wtime( );
    Sleep(1000);
    double end = omp_get_wtime( );
    double wtick = omp_get_wtick( );

    printf_s("start = %.16g\nend = %.16g\ndiff = %.16g\n",
             start, end, end - start);

    printf_s("wtick = %.16g\n1/wtick = %.16g\n",
             wtick, 1.0 / wtick);
}
start = 594255.3671159324
end = 594256.3664474116
diff = 0.9993314791936427
wtick = 2.793651148400146e-007
1/wtick = 3579545

See Also

Concepts

OpenMP Functions