[Disco] Implement num_workers
property for disco.Session
#16978
Merged
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Prior to this commit, while the
num_workers
argument was provided to thedisco.Session
object, it could not be determined from an existingdisco.Session
object. As a result, functions that interacted with a multi-GPU setup frequently required separatenum_workers
anddisco_session
argument, which could erroneously be out-of-sync (e.g. passing the incorrectnum_workers
, or omitting thedisco_session
argument whennum_workers>1
).To remove this class of errors, this commit adds a
disco.Session.num_workers
property. The separatenum_workers
argument is no longer necessary, as it can be determined from thedisco.Session
instance.