Messages in this thread Patch in this message | | | From | Rohit Jain <> | Subject | [PATCH 2/2] tools/testing: Adding tests to showcase the efficacy of IAS | Date | Fri, 12 May 2017 11:04:27 -0700 |
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This is a simple OpenMP program which does a barrier sync at the end of each parallel for loop section.
Signed-off-by: Rohit Jain <rohit.k.jain@oracle.com> --- tools/testing/selftests/openmp_barrier/Makefile | 6 +++++ tools/testing/selftests/openmp_barrier/barrier.c | 29 ++++++++++++++++++++++++ 2 files changed, 35 insertions(+) create mode 100644 tools/testing/selftests/openmp_barrier/Makefile create mode 100644 tools/testing/selftests/openmp_barrier/barrier.c
diff --git a/tools/testing/selftests/openmp_barrier/Makefile b/tools/testing/selftests/openmp_barrier/Makefile new file mode 100644 index 0000000..a6b4455 --- /dev/null +++ b/tools/testing/selftests/openmp_barrier/Makefile @@ -0,0 +1,6 @@ +CFLAGS += -m64 $(BUILD_FLAGS) +LDFLAGS += -O -fopenmp + +TEST_GEN_PROGS = barrier + +include ../lib.mk diff --git a/tools/testing/selftests/openmp_barrier/barrier.c b/tools/testing/selftests/openmp_barrier/barrier.c new file mode 100644 index 0000000..6dccd24 --- /dev/null +++ b/tools/testing/selftests/openmp_barrier/barrier.c @@ -0,0 +1,29 @@ +#include <sys/time.h> +#include <stdio.h> +#include <stdlib.h> +#define TV2NS(tv) ((tv).tv_sec * 1000000000L + (tv).tv_usec * 1000L) + +void work(void) +{ + int i; + volatile int *p = &i; + for (*p = 0; *p < 1000000; (*p)++) + ; +} + +int main(int argc, char *argv[]) +{ + struct timeval t1, t2; + long i, j, elapsed; + int n = (argc > 1 ? atoi(argv[1]) : 1000); + int nt = atoi(getenv("OMP_NUM_THREADS")); + gettimeofday(&t1, 0); + + for (i = 0; i < n; i++) + #pragma omp parallel for + for (j = 0; j < nt; j++) + work(); + gettimeofday(&t2, 0); + elapsed = TV2NS(t2) - TV2NS(t1); + printf("%.2f iters/sec\n", n / (elapsed / 1e9)); +} -- 2.7.4
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