From b4b1f7e7c742d26572fa2d2080e7679bdd506ee0 Mon Sep 17 00:00:00 2001 From: Andri Yngvason Date: Sat, 7 Sep 2019 18:38:32 +0000 Subject: [PATCH] bench: zrle: Use memcpy as a baseline --- bench/zrle-bench.c | 23 ++++++++++++++++++++++- 1 file changed, 22 insertions(+), 1 deletion(-) diff --git a/bench/zrle-bench.c b/bench/zrle-bench.c index 9dd6c7a..d31b3d6 100644 --- a/bench/zrle-bench.c +++ b/bench/zrle-bench.c @@ -34,6 +34,14 @@ uint64_t gettime_us(clockid_t clock) return ts.tv_sec * 1000000ULL + ts.tv_nsec / 1000ULL; } +#pragma push_options +#pragma GCC optimize ("-O0") +void memcpy_unoptimized(void* dst, const void* src, size_t len) +{ + memcpy(dst, src, len); +} +#pragma pop_options + int read_png_file(struct nvnc_fb* fb, const char *filename); int run_benchmark(const char *image) @@ -60,12 +68,25 @@ int run_benchmark(const char *image) deflateInit(&zs, Z_DEFAULT_COMPRESSION); + void *dummy = malloc(fb.width * fb.height * 4); + if (!dummy) + goto failure; + uint64_t start_time = gettime_us(CLOCK_PROCESS_CPUTIME_ID); + memcpy_unoptimized(dummy, fb.addr, fb.width * fb.height * 4); + + uint64_t end_time = gettime_us(CLOCK_PROCESS_CPUTIME_ID); + printf("memcpy baseline for %s took %"PRIu64" micro seconds\n", image, + end_time - start_time); + + free(dummy); + + start_time = gettime_us(CLOCK_PROCESS_CPUTIME_ID); rc = zrle_encode_frame(&zs, &frame, &pixfmt, fb.addr, &pixfmt, fb.width, fb.height, ®ion); - uint64_t end_time = gettime_us(CLOCK_PROCESS_CPUTIME_ID); + end_time = gettime_us(CLOCK_PROCESS_CPUTIME_ID); printf("Encoding %s took %"PRIu64" micro seconds\n", image, end_time - start_time);