kernel/linux.git/drivers/gpu/drm/scheduler/tests/tests_basic.c, branch v6.19.11

drm/sched: Fix a race in DRM_GPU_SCHED_STAT_NO_HANG test

2025-07-17T09:39:19+00:00

The "skip reset" test waits for the timeout handler to run for the duration of 2 * MOCK_TIMEOUT, and because the mock scheduler opted to remove the "skip reset" flag once it fires, this gives opportunity for the timeout handler to run twice. Second time the job will be removed from the mock scheduler job list and the drm_mock_sched_advance() call in the test will fail. Fix it by making the "don't reset" flag persist for the lifetime of the job and add a new flag to verify that the code path had executed as expected. Signed-off-by: Tvrtko Ursulin Fixes: 1472e7549f84 ("drm/sched: Add new test for DRM_GPU_SCHED_STAT_NO_HANG") Cc: Maíra Canal Cc: Philipp Stanner Reviewed-by: Maíra Canal Signed-off-by: Philipp Stanner Link: https://lore.kernel.org/r/20250716084817.56797-1-tvrtko.ursulin@igalia.com

drm/sched: Add new test for DRM_GPU_SCHED_STAT_NO_HANG

2025-07-15T11:27:07+00:00

Add a test to submit a single job against a scheduler with the timeout configured and verify that if the job is still running, the timeout handler will skip the reset and allow the job to complete. Reviewed-by: Tvrtko Ursulin Reviewed-by: Philipp Stanner Link: https://lore.kernel.org/r/20250714-sched-skip-reset-v6-4-5c5ba4f55039@igalia.com Signed-off-by: Maíra Canal

drm/sched: Make timeout KUnit tests faster

2025-07-15T11:27:07+00:00

As more KUnit tests are introduced to evaluate the basic capabilities of the `timedout_job()` hook, the test suite will continue to increase in duration. To reduce the overall running time of the test suite, decrease the scheduler's timeout for the timeout tests. Before this commit: [15:42:26] Elapsed time: 15.637s total, 0.002s configuring, 10.387s building, 5.229s running After this commit: [15:45:26] Elapsed time: 9.263s total, 0.002s configuring, 5.168s building, 4.037s running Reviewed-by: Tvrtko Ursulin Acked-by: Philipp Stanner Link: https://lore.kernel.org/r/20250714-sched-skip-reset-v6-3-5c5ba4f55039@igalia.com Signed-off-by: Maíra Canal

drm/sched/tests: Add unit test for cancel_job()

2025-07-10T15:07:08+00:00

The scheduler unit tests now provide a new callback, cancel_job(). This callback gets used by drm_sched_fini() for all still pending jobs to cancel them. Implement a new unit test to test this. Reviewed-by: Tvrtko Ursulin Signed-off-by: Philipp Stanner Link: https://lore.kernel.org/r/20250710125412.128476-6-phasta@kernel.org

drm/sched: Add a basic test for checking credit limit

2025-03-24T09:41:55+00:00

Add a basic test for checking whether scheduler respects the configured credit limit. Signed-off-by: Tvrtko Ursulin Cc: Christian König Cc: Danilo Krummrich Cc: Matthew Brost Cc: Philipp Stanner Acked-by: Christian König Signed-off-by: Philipp Stanner Link: https://patchwork.freedesktop.org/patch/msgid/20250324092633.49746-7-tvrtko.ursulin@igalia.com

drm/sched: Add a basic test for modifying entities scheduler list

2025-03-24T09:41:55+00:00

Add a basic test for exercising modifying the entities scheduler list at runtime. Signed-off-by: Tvrtko Ursulin Cc: Christian König Cc: Danilo Krummrich Cc: Matthew Brost Cc: Philipp Stanner Acked-by: Christian König Signed-off-by: Philipp Stanner Link: https://patchwork.freedesktop.org/patch/msgid/20250324092633.49746-6-tvrtko.ursulin@igalia.com

drm/sched: Add basic priority tests

2025-03-24T09:41:54+00:00

Add some basic tests for exercising entity priority handling. Signed-off-by: Tvrtko Ursulin Cc: Christian König Cc: Danilo Krummrich Cc: Matthew Brost Cc: Philipp Stanner Acked-by: Christian König Signed-off-by: Philipp Stanner Link: https://patchwork.freedesktop.org/patch/msgid/20250324092633.49746-5-tvrtko.ursulin@igalia.com

drm/sched: Add a simple timeout test

2025-03-24T09:41:53+00:00

Add a very simple timeout test which submits a single job and verifies that the timeout handling will run if the backend failed to complete the job in time. Signed-off-by: Tvrtko Ursulin Cc: Christian König Cc: Danilo Krummrich Cc: Matthew Brost Cc: Philipp Stanner Acked-by: Christian König Signed-off-by: Philipp Stanner Link: https://patchwork.freedesktop.org/patch/msgid/20250324092633.49746-4-tvrtko.ursulin@igalia.com

drm/sched: Add scheduler unit testing infrastructure and some basic tests

2025-03-24T09:41:52+00:00

Implement a mock scheduler backend and add some basic test to exercise the core scheduler code paths. Mock backend (kind of like a very simple mock GPU) can either process jobs by tests manually advancing the "timeline" job at a time, or alternatively jobs can be configured with a time duration in which case they get completed asynchronously from the unit test code. Core scheduler classes are subclassed to support this mock implementation. The tests added are just a few simple submission patterns. Signed-off-by: Tvrtko Ursulin Suggested-by: Philipp Stanner Cc: Christian König Cc: Danilo Krummrich Cc: Matthew Brost Cc: Philipp Stanner Acked-by: Christian König Signed-off-by: Philipp Stanner Link: https://patchwork.freedesktop.org/patch/msgid/20250324092633.49746-3-tvrtko.ursulin@igalia.com