Commit a382aeec authored by Chris Wilson's avatar Chris Wilson

i915/gem_exec_parse: Switch to a fixed timeout for basic-allocations

basic-allocations was written to demonstrate a flaw in our continual
reallocation of cmdparser shadow bo, largely fixed by keeping a small
cache of bo of different lengths (to speed up the search for the correct
sized bo). We only care enough to exercise the slowdown by submitting
lots of execbufs, and can see the effect of bo caching on the rate, so
replace the fixed number of iterations with a timeout and count how many
batches we could submit instead.

Similarly, we now do not need to wait for all of our queue to complete
as we can tell the kernel to drop the queue instead.

References: https://bugs.freedesktop.org/show_bug.cgi?id=107936Signed-off-by: Chris Wilson's avatarChris Wilson <chris@chris-wilson.co.uk>
Cc: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Reviewed-by: Tvrtko Ursulin's avatarTvrtko Ursulin <tvrtko.ursulin@intel.com>
parent f273b14e
Pipeline #22603 passed with stages
in 8 minutes and 32 seconds
......@@ -303,15 +303,15 @@ test_lri(int fd, uint32_t handle, struct test_lri *test)
static void test_allocations(int fd)
{
uint32_t bbe = MI_BATCH_BUFFER_END;
const uint32_t bbe = MI_BATCH_BUFFER_END;
struct drm_i915_gem_execbuffer2 execbuf;
struct drm_i915_gem_exec_object2 obj[17];
int i, j;
unsigned long count;
intel_require_memory(2, 1ull<<(12 + ARRAY_SIZE(obj)), CHECK_RAM);
memset(obj, 0, sizeof(obj));
for (i = 0; i < ARRAY_SIZE(obj); i++) {
for (int i = 0; i < ARRAY_SIZE(obj); i++) {
uint64_t size = 1ull << (12 + i);
obj[i].handle = gem_create(fd, size);
......@@ -322,17 +322,21 @@ static void test_allocations(int fd)
memset(&execbuf, 0, sizeof(execbuf));
execbuf.buffer_count = 1;
for (j = 0; j < 16384; j++) {
igt_progress("allocations ", j, 16384);
i = rand() % ARRAY_SIZE(obj);
count = 0;
igt_until_timeout(20) {
int i = rand() % ARRAY_SIZE(obj);
execbuf.buffers_ptr = to_user_pointer(&obj[i]);
execbuf.batch_start_offset = (rand() % (1ull<<i)) << 12;
execbuf.batch_start_offset += 64 * (rand() % 64);
execbuf.batch_len = (1ull<<(12+i)) - execbuf.batch_start_offset;
gem_execbuf(fd, &execbuf);
count++;
}
igt_info("Submitted %lu execbufs\n", count);
igt_drop_caches_set(fd, DROP_RESET_ACTIVE); /* Cancel the queued work */
for (i = 0; i < ARRAY_SIZE(obj); i++) {
for (int i = 0; i < ARRAY_SIZE(obj); i++) {
gem_sync(fd, obj[i].handle);
gem_close(fd, obj[i].handle);
}
......
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