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Diffstat (limited to 'libgomp/testsuite/libgomp.c/omp_workshare1.c')
-rw-r--r-- | libgomp/testsuite/libgomp.c/omp_workshare1.c | 47 |
1 files changed, 47 insertions, 0 deletions
diff --git a/libgomp/testsuite/libgomp.c/omp_workshare1.c b/libgomp/testsuite/libgomp.c/omp_workshare1.c new file mode 100644 index 000000000..e33bef316 --- /dev/null +++ b/libgomp/testsuite/libgomp.c/omp_workshare1.c @@ -0,0 +1,47 @@ +/****************************************************************************** +* FILE: omp_workshare1.c +* DESCRIPTION: +* OpenMP Example - Loop Work-sharing - C/C++ Version +* In this example, the iterations of a loop are scheduled dynamically +* across the team of threads. A thread will perform CHUNK iterations +* at a time before being scheduled for the next CHUNK of work. +* AUTHOR: Blaise Barney 5/99 +* LAST REVISED: 04/06/05 +******************************************************************************/ +#include <omp.h> +#include <stdio.h> +#include <stdlib.h> +#define CHUNKSIZE 10 +#define N 100 + +int main (int argc, char *argv[]) { + +int nthreads, tid, i, chunk; +float a[N], b[N], c[N]; + +/* Some initializations */ +for (i=0; i < N; i++) + a[i] = b[i] = i * 1.0; +chunk = CHUNKSIZE; + +#pragma omp parallel shared(a,b,c,nthreads,chunk) private(i,tid) + { + tid = omp_get_thread_num(); + if (tid == 0) + { + nthreads = omp_get_num_threads(); + printf("Number of threads = %d\n", nthreads); + } + printf("Thread %d starting...\n",tid); + + #pragma omp for schedule(dynamic,chunk) + for (i=0; i<N; i++) + { + c[i] = a[i] + b[i]; + printf("Thread %d: c[%d]= %f\n",tid,i,c[i]); + } + + } /* end of parallel section */ + + return 0; +} |