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igt/gem_exec_alignment: Test multiple objects with alignment as well

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Compute the largest alignment for the most number of objects we can create,
then trying an execbuf with them.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
This commit is contained in:
Chris Wilson 2016-01-19 16:52:32 +00:00
parent e7bdc5c916
commit 167fb9e7b2
1 changed files with 104 additions and 8 deletions
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112
tests/gem_exec_alignment.c
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@ -45,25 +45,107 @@ static int __gem_execbuf(int fd, struct drm_i915_gem_execbuffer2 *eb)
return drmIoctl(fd, DRM_IOCTL_I915_GEM_EXECBUFFER2, eb);
}
igt_simple_main
static uint32_t find_last_bit(uint64_t x)
{
uint32_t i = 0;
while (x) {
x >>= 1;
i++;
}
return i;
}
static uint32_t file_max(void)
{
static uint32_t max;
if (max == 0) {
FILE *file = fopen("/proc/sys/fs/file-max", "r");
max = 80000;
if (file) {
igt_assert(fscanf(file, "%d", &max) == 1);
fclose(file);
}
max /= 2;
}
return max;
}
static void many(int fd)
{
uint32_t bbe = MI_BATCH_BUFFER_END;
struct drm_i915_gem_exec_object2 *execobj;
struct drm_i915_gem_execbuffer2 execbuf;
uint64_t gtt_size, ram_size;
uint64_t alignment, max_alignment, count, i;
gtt_size = gem_aperture_size(fd);
ram_size = intel_get_total_ram_mb();
ram_size *= 1024 * 1024;
count = ram_size / 4096;
if (count > file_max()) /* vfs cap */
count = file_max();
max_alignment = find_last_bit(gtt_size / count);
if (max_alignment <= 12)
max_alignment = 4096;
else
max_alignment = 1ull << max_alignment;
count = gtt_size / max_alignment / 2;
igt_info("gtt_size=%lld MiB, max-alignment=%lld, count=%lld\n",
(long long)gtt_size/1024/1024,
(long long)max_alignment,
(long long)count);
intel_require_memory(count, 4096, CHECK_RAM);
execobj = calloc(sizeof(*execobj), count + 1);
igt_assert(execobj);
for (i = 0; i < count; i++)
execobj[i].handle = gem_create(fd, 4096);
execobj[i].handle = gem_create(fd, 4096);
gem_write(fd, execobj[i].handle, 0, &bbe, sizeof(bbe));
memset(&execbuf, 0, sizeof(execbuf));
execbuf.buffers_ptr = (uintptr_t)execobj;
execbuf.buffer_count = count + 1;
gem_execbuf(fd, &execbuf);
for (alignment = 4096; alignment < gtt_size; alignment <<= 1) {
for (i = 0; i < count; i++)
execobj[i].alignment = alignment;
if (alignment > max_alignment) {
uint64_t factor = alignment / max_alignment;
execbuf.buffer_count = count / factor + 1;
execbuf.buffers_ptr = (uintptr_t)(execobj + (factor - 1) * count / factor);
}
igt_debug("testing %lld x alignment=%lld\n",
(long long)execbuf.buffer_count,
(long long)alignment);
gem_execbuf(fd, &execbuf);
for (i = 0; i < count; i++)
igt_assert_eq_u64(execobj[i].alignment, alignment);
}
for (i = 0; i < count; i++)
gem_close(fd, execobj[i].handle);
gem_close(fd, execobj[i].handle);
free(execobj);
}
static void single(int fd)
{
struct drm_i915_gem_exec_object2 execobj;
struct drm_i915_gem_execbuffer2 execbuf;
uint32_t batch = MI_BATCH_BUFFER_END;
uint64_t gtt_size;
int non_pot;
int fd;
igt_skip_on_simulation();
fd = drm_open_driver(DRIVER_INTEL);
memset(&execobj, 0, sizeof(execobj));
memset(&execbuf, 0, sizeof(execbuf));
execobj.handle = gem_create(fd, 4096);
gem_write(fd, execobj.handle, 0, &batch, sizeof(batch));
memset(&execbuf, 0, sizeof(execbuf));
execbuf.buffers_ptr = (uintptr_t)&execobj;
execbuf.buffer_count = 1;
@ -97,4 +179,18 @@ igt_simple_main
gem_execbuf(fd, &execbuf);
igt_assert_eq_u64(execobj.offset % execobj.alignment, 0);
}
gem_close(fd, execobj.handle);
}
igt_simple_main
{
int fd;
igt_skip_on_simulation();
fd = drm_open_driver(DRIVER_INTEL);
single(fd);
many(fd);
}