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gpu: nvgpu: unit: worker: add more coverage

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This adds a test to cover a missing branch in the worker thread.

JIRA NVGPU-4818

Change-Id: I6e4a1f4615954a666549d063020308b592286347
Signed-off-by: Philip Elcan <pelcan@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/2276649
Reviewed-by: svc-mobile-coverity <svc-mobile-coverity@nvidia.com>
Reviewed-by: svc-mobile-cert <svc-mobile-cert@nvidia.com>
GVS: Gerrit_Virtual_Submit
Reviewed-by: Thomas Fleury <tfleury@nvidia.com>
Reviewed-by: Vijayakumar Subbu <vsubbu@nvidia.com>
Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com>
Tested-by: mobile promotions <svcmobile_promotions@nvidia.com>
This commit is contained in:
Philip Elcan
2020-01-09 09:21:20 -05:00
committed by Alex Waterman
parent 0836f31c47
commit 796781313e
2 changed files with 50 additions and 4 deletions
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46
userspace/units/interface/worker/worker.c
View File

@@ -60,6 +60,15 @@ static void wakeup_post_process(struct nvgpu_worker *worker)
nvgpu_atomic_inc(&wakeup_post_process_val);
}
static void wakeup_post_process_stop_thread(struct nvgpu_worker *worker)
{
struct nvgpu_posix_fault_inj *thread_fi =
nvgpu_thread_get_fault_injection();
nvgpu_posix_enable_fault_injection(thread_fi, true, 0);
nvgpu_atomic_inc(&wakeup_post_process_val);
}
static bool stall_processing = false;
static nvgpu_atomic_t item_count;
static void wakeup_process_item(struct nvgpu_list_node *work_item)
@@ -182,7 +191,7 @@ int test_branches(struct unit_module *m, struct gk20a *g, void *args)
int err;
struct nvgpu_list_node work_item;
int last_item_count;
struct nvgpu_posix_fault_inj *thread_create_fi =
struct nvgpu_posix_fault_inj *thread_fi =
nvgpu_thread_get_fault_injection();
struct nvgpu_posix_fault_inj *thread_running_fi =
nvgpu_thread_running_true_get_fault_injection();
@@ -262,11 +271,11 @@ int test_branches(struct unit_module *m, struct gk20a *g, void *args)
* starting the thread fails.
*/
nvgpu_init_list_node(&work_item);
nvgpu_posix_enable_fault_injection(thread_create_fi, true, 0);
nvgpu_posix_enable_fault_injection(thread_fi, true, 0);
if (!EXPECT_BUG(nvgpu_worker_enqueue(&worker, &work_item))) {
unit_return_fail(m, "should have failed to enqueue\n");
}
nvgpu_posix_enable_fault_injection(thread_create_fi, false, 0);
nvgpu_posix_enable_fault_injection(thread_fi, false, 0);
/*
* While the thread is stopped, we can hit a branch in the worker start
@@ -279,6 +288,37 @@ int test_branches(struct unit_module *m, struct gk20a *g, void *args)
unit_assert(err == 0, return UNIT_FAIL);
nvgpu_posix_enable_fault_injection(thread_running_fi, false, 0);
/* Re-init the worker to start the thread for next test. */
worker_ops.pre_process = pre_process;
nvgpu_atomic_set(&pre_process_count, 0);
nvgpu_worker_init(g, &worker, &worker_ops);
unit_assert(err == 0, return UNIT_FAIL);
/* make sure thread has started */
while (nvgpu_atomic_read(&pre_process_count) < 1) {
nvgpu_udelay(5);
}
/*
* Test for loop checking for thread_should_stop. The
* wakeup_post_process callback will enable the thread fault inject
* so nvgpu_thread_should_stop will return true.
* This will exit the thread.
*/
worker_ops.wakeup_post_process = wakeup_post_process_stop_thread;
nvgpu_atomic_set(&wakeup_post_process_val, 0);
nvgpu_init_list_node(&work_item);
err = nvgpu_worker_enqueue(&worker, &work_item);
unit_assert(err == 0, return UNIT_FAIL);
while (nvgpu_atomic_read(&wakeup_post_process_val) < 1) {
nvgpu_udelay(5);
}
/* there's no way to know the thread has exited, so wait a little */
nvgpu_udelay(1000);
worker_ops.wakeup_post_process = wakeup_post_process;
nvgpu_posix_enable_fault_injection(thread_fi, false, 0);
/* when the thread exists, we need sync some state */
nvgpu_thread_stop(&worker.poll_task);
/* Re-init the worker to start the thread for de-init testing. */
worker_ops.pre_process = pre_process;
nvgpu_atomic_set(&pre_process_count, 0);

8
userspace/units/interface/worker/worker.h
View File

@@ -137,7 +137,13 @@ int test_enqueue(struct unit_module *m, struct gk20a *g, void *args);
* - Enqueue a work item (which will try to restart the thread).
* - Verify no error is returned.
* - Disable fault injection for checking if thread is running.
* - Re-init the worker to restart the thread properly.
* - Re-init the worker to restart the thread properly for next test.
* - Case 8: Test thread stopping when thread_should_stop is set.
* - Enqueue a work item.
* - In, the wakeup_post_process callback, set the thread fault injection.
* - Wait until thread exits.
* - Disable thread fault injection.
* - Re-init the worker to restart the thread properly for next test.
*
* Output: Returns PASS if expected result is met, FAIL otherwise.
*/