[Disco] Implement num_workers property for disco.Session
#16990
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Prior to this commit, while the `num_workers` argument was provided to the `disco.Session` object, it could not be determined from an existing `disco.Session` object. As a result, functions that interacted with a multi-GPU setup frequently required separate `num_workers` and `disco_session` argument, which could erroneously be out-of-sync (e.g. passing the incorrect `num_workers`, or omitting the `disco_session` argument when `num_workers>1`). To remove this class of errors, this commit adds a `disco.Session.num_workers` property. The separate `num_workers` argument is no longer necessary, as it can be determined from the `disco.Session` instance.
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Closing this PR, as it is identical to #16978. I think that means I have too many open PRs, and any help in reviewing them would be appreciated. |
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Prior to this commit, while the
num_workersargument was provided to thedisco.Sessionobject, it could not be determined from an existingdisco.Sessionobject. As a result, functions that interacted with a multi-GPU setup frequently required separatenum_workersanddisco_sessionargument, which could erroneously be out-of-sync (e.g. passing the incorrectnum_workers, or omitting thedisco_sessionargument whennum_workers>1).To remove this class of errors, this commit adds a
disco.Session.num_workersproperty. The separatenum_workersargument is no longer necessary, as it can be determined from thedisco.Sessioninstance.