diff options
| -rw-r--r-- | tests/gem_gtt_speed.c | 67 |
1 files changed, 38 insertions, 29 deletions
diff --git a/tests/gem_gtt_speed.c b/tests/gem_gtt_speed.c index af9f9478..1e63b781 100644 --- a/tests/gem_gtt_speed.c +++ b/tests/gem_gtt_speed.c @@ -130,14 +130,23 @@ static double elapsed(const struct timeval *start, int main(int argc, char **argv) { struct timeval start, end; - uint8_t buf[OBJECT_SIZE]; + uint8_t *buf; uint32_t handle; + int size = OBJECT_SIZE; int loop, i, tiling; int fd; + if (argc > 1) + size = atoi(argv[1]); + if (size == 0) { + fprintf(stderr, "Invalid object size specified\n"); + return 1; + } + + buf = malloc(size); fd = drm_open_any(); - handle = gem_create(fd, OBJECT_SIZE); + handle = gem_create(fd, size); assert(handle); for (tiling = I915_TILING_NONE; tiling <= I915_TILING_Y; tiling++) { @@ -151,80 +160,80 @@ int main(int argc, char **argv) /* CPU pwrite */ gettimeofday(&start, NULL); for (loop = 0; loop < 1000; loop++) - gem_write(fd, handle, 0, buf, sizeof(buf)); + gem_write(fd, handle, 0, buf, size); gettimeofday(&end, NULL); - printf("Time to pwrite 16k through the CPU: %7.3fµs\n", - elapsed(&start, &end, loop)); + printf("Time to pwrite %dk through the CPU: %7.3fµs\n", + size/1024, elapsed(&start, &end, loop)); /* CPU pread */ gettimeofday(&start, NULL); for (loop = 0; loop < 1000; loop++) - gem_read(fd, handle, 0, buf, sizeof(buf)); + gem_read(fd, handle, 0, buf, size); gettimeofday(&end, NULL); - printf("Time to pread 16k through the CPU: %7.3fµs\n", - elapsed(&start, &end, loop)); + printf("Time to pread %dk through the CPU: %7.3fµs\n", + size/1024, elapsed(&start, &end, loop)); } /* mmap read */ gettimeofday(&start, NULL); for (loop = 0; loop < 1000; loop++) { - volatile uint32_t *ptr = gem_mmap(fd, handle, OBJECT_SIZE, PROT_READ); + volatile uint32_t *ptr = gem_mmap(fd, handle, size, PROT_READ); int x = 0; - for (i = 0; i < OBJECT_SIZE/sizeof(*ptr); i++) + for (i = 0; i < size/sizeof(*ptr); i++) x += ptr[i]; - munmap((void *)ptr, OBJECT_SIZE); + munmap((void *)ptr, size); } gettimeofday(&end, NULL); - printf("Time to read 16k through a GTT map: %7.3fµs\n", - elapsed(&start, &end, loop)); + printf("Time to read %dk through a GTT map: %7.3fµs\n", + size/1024, elapsed(&start, &end, loop)); /* mmap write */ gettimeofday(&start, NULL); for (loop = 0; loop < 1000; loop++) { - volatile uint32_t *ptr = gem_mmap(fd, handle, OBJECT_SIZE, PROT_READ | PROT_WRITE); + volatile uint32_t *ptr = gem_mmap(fd, handle, size, PROT_READ | PROT_WRITE); - for (i = 0; i < OBJECT_SIZE/sizeof(*ptr); i++) + for (i = 0; i < size/sizeof(*ptr); i++) ptr[i] = i; - munmap((void *)ptr, OBJECT_SIZE); + munmap((void *)ptr, size); } gettimeofday(&end, NULL); - printf("Time to write 16k through a GTT map: %7.3fµs\n", - elapsed(&start, &end, loop)); + printf("Time to write %dk through a GTT map: %7.3fµs\n", + size/1024, elapsed(&start, &end, loop)); /* mmap read */ gettimeofday(&start, NULL); for (loop = 0; loop < 1000; loop++) { - volatile uint32_t *ptr = gem_mmap(fd, handle, OBJECT_SIZE, PROT_READ); + volatile uint32_t *ptr = gem_mmap(fd, handle, size, PROT_READ); int x = 0; - for (i = 0; i < OBJECT_SIZE/sizeof(*ptr); i++) + for (i = 0; i < size/sizeof(*ptr); i++) x += ptr[i]; - munmap((void *)ptr, OBJECT_SIZE); + munmap((void *)ptr, size); } gettimeofday(&end, NULL); - printf("Time to read 16k (again) through a GTT map: %7.3fµs\n", - elapsed(&start, &end, loop)); + printf("Time to read %dk (again) through a GTT map: %7.3fµs\n", + size/1024, elapsed(&start, &end, loop)); if (tiling == I915_TILING_NONE) { /* GTT pwrite */ gettimeofday(&start, NULL); for (loop = 0; loop < 1000; loop++) - gem_write(fd, handle, 0, buf, sizeof(buf)); + gem_write(fd, handle, 0, buf, size); gettimeofday(&end, NULL); - printf("Time to pwrite 16k through the GTT: %7.3fµs\n", - elapsed(&start, &end, loop)); + printf("Time to pwrite %dk through the GTT: %7.3fµs\n", + size, elapsed(&start, &end, loop)); /* GTT pread */ gettimeofday(&start, NULL); for (loop = 0; loop < 1000; loop++) - gem_read(fd, handle, 0, buf, sizeof(buf)); + gem_read(fd, handle, 0, buf, size); gettimeofday(&end, NULL); - printf("Time to pread 16k through the GTT: %7.3fµs\n", - elapsed(&start, &end, loop)); + printf("Time to pread %dk through the GTT: %7.3fµs\n", + size, elapsed(&start, &end, loop)); } } |