From 0c63e8b7b97fb72ef38c8edbfbe751d3602e03a1 Mon Sep 17 00:00:00 2001 From: Michael Ellerman Date: Thu, 2 Jun 2016 22:02:01 +1000 Subject: selftests/powerpc: Import Anton's mmap & futex micro benchmarks These are useful little loops for smoke testing performance. Signed-off-by: Anton Blanchard Signed-off-by: Michael Ellerman --- .../selftests/powerpc/benchmarks/mmap_bench.c | 41 ++++++++++++++++++++++ 1 file changed, 41 insertions(+) create mode 100644 tools/testing/selftests/powerpc/benchmarks/mmap_bench.c (limited to 'tools/testing/selftests/powerpc/benchmarks/mmap_bench.c') diff --git a/tools/testing/selftests/powerpc/benchmarks/mmap_bench.c b/tools/testing/selftests/powerpc/benchmarks/mmap_bench.c new file mode 100644 index 000000000000..8d084a2d6e74 --- /dev/null +++ b/tools/testing/selftests/powerpc/benchmarks/mmap_bench.c @@ -0,0 +1,41 @@ +/* + * Copyright 2016, Anton Blanchard, Michael Ellerman, IBM Corp. + * Licensed under GPLv2. + */ + +#include +#include +#include +#include + +#include "utils.h" + +#define ITERATIONS 5000000 + +#define MEMSIZE (128 * 1024 * 1024) + +int test_mmap(void) +{ + struct timespec ts_start, ts_end; + unsigned long i = ITERATIONS; + + clock_gettime(CLOCK_MONOTONIC, &ts_start); + + while (i--) { + char *c = mmap(NULL, MEMSIZE, PROT_READ|PROT_WRITE, + MAP_PRIVATE|MAP_ANONYMOUS, -1, 0); + FAIL_IF(c == MAP_FAILED); + munmap(c, MEMSIZE); + } + + clock_gettime(CLOCK_MONOTONIC, &ts_end); + + printf("time = %.6f\n", ts_end.tv_sec - ts_start.tv_sec + (ts_end.tv_nsec - ts_start.tv_nsec) / 1e9); + + return 0; +} + +int main(void) +{ + return test_harness(test_mmap, "mmap_bench"); +} -- cgit