diff options
| -rw-r--r-- | benchmarks/gem_blt.c | 66 |
1 files changed, 44 insertions, 22 deletions
diff --git a/benchmarks/gem_blt.c b/benchmarks/gem_blt.c index 8fe80bc1..820695c9 100644 --- a/benchmarks/gem_blt.c +++ b/benchmarks/gem_blt.c @@ -53,6 +53,37 @@ static int has_64bit_reloc; +static double +elapsed(const struct timespec *start, const struct timespec *end) +{ + return (end->tv_sec - start->tv_sec) + 1e-9*(end->tv_nsec - start->tv_nsec); +} + +static int baseline(uint64_t bytes, int milliseconds) +{ + struct timespec start, end; + const int size = 64*1024*1024; + int count = 0; + void *mem; + + mem = malloc(size); + if (mem == NULL) + return 1; + + clock_gettime(CLOCK_MONOTONIC, &start); + do { + memset(mem, count, size); + count++; + clock_gettime(CLOCK_MONOTONIC, &end); + if (elapsed(&start, &end) > 0.1) + break; + } while (1); + + free(mem); + + return ceil(1e-3*milliseconds/elapsed(&start, &end) * (count * size) / bytes); +} + static int gem_linear_blt(int fd, uint32_t *batch, int offset, @@ -147,11 +178,6 @@ static int gem_linear_blt(int fd, return (b+2 - batch) * sizeof(uint32_t); } -static double elapsed(const struct timespec *start, const struct timespec *end) -{ - return (end->tv_sec - start->tv_sec) + 1e-9*(end->tv_nsec - start->tv_nsec); -} - static int __gem_execbuf(int fd, struct drm_i915_gem_execbuffer2 *execbuf) { int err = 0; @@ -160,14 +186,14 @@ static int __gem_execbuf(int fd, struct drm_i915_gem_execbuffer2 *execbuf) return err; } -static int run(int object, int batch, int count, int set, int reps) +static int run(int object, int batch, int time, int reps) { struct drm_i915_gem_execbuffer2 execbuf; struct drm_i915_gem_exec_object2 exec[3]; struct drm_i915_gem_relocation_entry *reloc; uint32_t *buf, handle, src, dst; int fd, len, gen, size, nreloc; - int ring; + int ring, count; size = ALIGN(batch * 64, 4096); reloc = malloc(sizeof(*reloc)*size/32*2); @@ -237,10 +263,13 @@ static int run(int object, int batch, int count, int set, int reps) if (execbuf.flags & LOCAL_I915_EXEC_HANDLE_LUT) execbuf.flags |= LOCAL_I915_EXEC_NO_RELOC; + /* Guess how many loops we need for 0.1s */ + count = baseline((uint64_t)object * batch, 100); + while (reps--) { double min = HUGE_VAL; - for (int s = 0; s < set; s++) { + for (int s = 0; s <= time / 100; s++) { struct timespec start, end; double t; @@ -265,30 +294,23 @@ static int run(int object, int batch, int count, int set, int reps) int main(int argc, char **argv) { int size = 1024*1024; - int count = 1; int reps = 13; - int set = 30; + int time = 2000; int batch = 1; int c; - while ((c = getopt (argc, argv, "c:r:s:b:S:")) != -1) { + while ((c = getopt (argc, argv, "s:b:r:t:")) != -1) { switch (c) { - case 'c': - count = atoi(optarg); - if (count < 1) - count = 1; - break; - case 's': size = atoi(optarg); if (size < 4096) size = 4096; break; - case 'S': - set = atoi(optarg); - if (set < 1) - set = 1; + case 't': + time = atoi(optarg); + if (time < 1) + time = 1; break; case 'r': @@ -308,5 +330,5 @@ int main(int argc, char **argv) } } - return run(size, batch, count, set, reps); + return run(size, batch, time, reps); } |