Reinforce scheduling invariants (#17132)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/17132
schedule() function is not supposed to throw exception and is supposed
to succeed in scheduling the full graph of tasks, potential errors (e.g. errors
from underlying thread pool, out of memory exceptions etc) are considered not
recoverable.
The invariant - the graph of tasks is either not executed or
executed in full before the call to finishRun()
Reviewed By: andrewwdye
Differential Revision: D14092457
fbshipit-source-id: a3e5d65dfee5ff5e5e71ec72bb9e576180019698
