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gem_gtt_speed: Add option for variable buffer size

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This commit is contained in:
Chris Wilson 2011-05-25 14:40:38 +01:00
parent 4227da8c3c
commit f40d54e132
1 changed files with 38 additions and 29 deletions
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67
tests/gem_gtt_speed.c
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@ -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));
}
}