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| igt_spin_t * | igt_spin_batch_new () | 
| void | igt_spin_batch_set_timeout () | 
| void | igt_spin_batch_end () | 
| void | igt_spin_batch_free () | 
| void | igt_terminate_spin_batches () | 
A lot of igt testcases need some GPU workload to make sure a race window is big enough. Unfortunately having a fixed amount of workload leads to spurious test failures or overly long runtimes on some fast/slow platforms. This library contains functionality to submit GPU workloads that should consume exactly a specific amount of time.
igt_spin_t * igt_spin_batch_new (int fd,int engine,unsigned int dep_handle);
Start a recursive batch on a ring. Immediately returns a igt_spin_t that
contains the batch's handle that can be waited upon. The returned structure
must be passed to igt_spin_batch_free() for post-processing.
void igt_spin_batch_set_timeout (igt_spin_t *spin,int64_t ns);
Specify a timeout. This ends the recursive batch associated with spin
 after
the timeout has elapsed.
| spin | spin batch state from  | |
| ns | amount of time in nanoseconds the batch continues to execute before finishing. | 
void
igt_spin_batch_end (igt_spin_t *spin);
End the recursive batch associated with spin
 manually.
void igt_spin_batch_free (int fd,igt_spin_t *spin);
This function does the necessary post-processing after starting a recursive
batch with igt_spin_batch_new().