onnxruntime

4bd9e8d0 - Stress-test and fix thread pool when work queues are full (#4690)

Stress-test and fix thread pool when work queues are full (#4690) While investigating an unrelated issue, I noticed that the thread pool may drop tasks when a burst of 1024+ tasks is submitted by a thread from inside the pool. Today, in general, we execute work synchronously in this case. However, there is a bug where work submitted by a thread already inside the pool will be discarded instead of executed. Currently the only scenario where I can see this occurring is when the parallel executor is used with a model in which such a large number of nodes become eligible to run all at once. This PR fixes the underlying issue and adds a test case for burst-submission of work.