llvm

461fa021 - [SYCL] Clean up shared events from queues upon reaching a threshold (#3068)

[SYCL] Clean up shared events from queues upon reaching a threshold (#3068) Previously the shared ownership of some events (USM and those without dependencies) by queues was released only upon calls to queue::wait/wait_and_throw(). If the application exclusively uses event::wait() instead, those events will be kept alive until the destruction of the queue. The patch addresses this problem by introducing a threshold on shared events associated with each queue. If that threshold is exceeded upon adding a new shared event for the queue, its events are queried for their execution status and the completed ones are released.