diff options
| -rw-r--r-- | tests/gem_pwrite.c | 19 |
1 files changed, 18 insertions, 1 deletions
diff --git a/tests/gem_pwrite.c b/tests/gem_pwrite.c index 45a7e63f..9c30dbbe 100644 --- a/tests/gem_pwrite.c +++ b/tests/gem_pwrite.c @@ -103,18 +103,35 @@ int main(int argc, char **argv) dst = gem_create(fd, object_size); src = malloc(object_size); + + gem_set_cacheing(fd, dst, 0); + for (count = 1; count <= 1<<17; count <<= 1) { + struct timeval start, end; + + gettimeofday(&start, NULL); + do_gem_write(fd, dst, src, object_size, count); + gettimeofday(&end, NULL); + printf("Time to uncached pwrite %d bytes x %6d: %7.3fµs, %s\n", + object_size, count, + elapsed(&start, &end, count), + bytes_per_sec((char *)buf, object_size/elapsed(&start, &end, count)*1e6)); + fflush(stdout); + } + + gem_set_cacheing(fd, dst, 1); for (count = 1; count <= 1<<17; count <<= 1) { struct timeval start, end; gettimeofday(&start, NULL); do_gem_write(fd, dst, src, object_size, count); gettimeofday(&end, NULL); - printf("Time to pwrite %d bytes x %6d: %7.3fµs, %s\n", + printf("Time to snooped pwrite %d bytes x %6d: %7.3fµs, %s\n", object_size, count, elapsed(&start, &end, count), bytes_per_sec((char *)buf, object_size/elapsed(&start, &end, count)*1e6)); fflush(stdout); } + free(src); gem_close(fd, dst); |