diff options
Diffstat (limited to 'benchtests/bench-string.h')
| -rw-r--r-- | benchtests/bench-string.h | 63 |
1 files changed, 36 insertions, 27 deletions
diff --git a/benchtests/bench-string.h b/benchtests/bench-string.h index 94aaafd..f838998 100644 --- a/benchtests/bench-string.h +++ b/benchtests/bench-string.h @@ -76,10 +76,8 @@ extern impl_t __start_impls[], __stop_impls[]; # define INNER_LOOP_ITERS 64 -unsigned char *buf1, *buf2; int ret, do_srandom; unsigned int seed; -size_t page_size; # ifndef ITERATIONS size_t iterations = 100000; @@ -182,47 +180,57 @@ static impl_t *impl_array; # define BUF1PAGES 1 # endif +unsigned char *buf1, *buf2; +static size_t buf1_size, buf2_size, page_size; + static void -alloc_bufs (void) +init_sizes (void) { page_size = 2 * getpagesize (); # ifdef MIN_PAGE_SIZE if (page_size < MIN_PAGE_SIZE) page_size = MIN_PAGE_SIZE; # endif - buf1 = mmap (0, (BUF1PAGES + 1) * page_size, PROT_READ | PROT_WRITE, - MAP_PRIVATE | MAP_ANON, -1, 0); - if (buf1 == MAP_FAILED) - error (EXIT_FAILURE, errno, "mmap failed for buf1"); - if (mprotect (buf1 + BUF1PAGES * page_size, page_size, PROT_NONE)) - error (EXIT_FAILURE, errno, "mprotect failed for buf1"); - buf2 = mmap (0, 2 * page_size, PROT_READ | PROT_WRITE, - MAP_PRIVATE | MAP_ANON, -1, 0); - if (buf2 == MAP_FAILED) - error (EXIT_FAILURE, errno, "mmap failed for buf2"); - if (mprotect (buf2 + page_size, page_size, PROT_NONE)) - error (EXIT_FAILURE, errno, "mprotect failed for buf2"); + + buf1_size = BUF1PAGES * page_size; + buf2_size = page_size; +} + +static void +exit_error (const char *id, const char *func) +{ + error (EXIT_FAILURE, errno, "%s: %s failed", id, func); } +/* Allocate a buffer of size SIZE with a guard page at the end. */ static void -__attribute__ ((unused)) -realloc_bufs (void) +alloc_buf (const char *id, size_t size, unsigned char **retbuf) { - int ret = 0; + size_t alloc_size = size + page_size; - if (buf1) - ret = munmap (buf1, (BUF1PAGES + 1) * page_size); + if (*retbuf != NULL) + { + int ret = munmap (*retbuf, alloc_size); + if (ret != 0) + exit_error (id, "munmap"); + } - if (ret != 0) - error (EXIT_FAILURE, errno, "munmap failed for buf1"); + unsigned char *buf = mmap (0, alloc_size, PROT_READ | PROT_WRITE, + MAP_PRIVATE | MAP_ANON, -1, 0); - if (buf2) - ret = munmap (buf2, 2 * page_size); + if (buf == MAP_FAILED) + exit_error (id, "mmap"); + if (mprotect (buf + size, page_size, PROT_NONE)) + exit_error (id, "mprotect"); - if (ret != 0) - error (EXIT_FAILURE, errno, "munmap failed for buf2"); + *retbuf = buf; +} - alloc_bufs (); +static void +alloc_bufs (void) +{ + alloc_buf ("buf1", buf1_size, &buf1); + alloc_buf ("buf2", buf2_size, &buf2); } static void @@ -234,6 +242,7 @@ test_init (void) / sizeof func_list[0])); # endif + init_sizes (); alloc_bufs (); if (do_srandom) |