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bench: zrle: Use memcpy as a baseline

tight-png
Andri Yngvason 2019-09-07 18:38:32 +00:00
parent 3f0e0b8867
commit b4b1f7e7c7
1 changed files with 22 additions and 1 deletions
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23
bench/zrle-bench.c
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@ -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, &region);
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);