[Disco][QoL] Implement broadcast/scatter methods for Session#17011
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Lunderberg wants to merge 1 commit intoapache:mainfrom
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[Disco][QoL] Implement broadcast/scatter methods for Session#17011Lunderberg wants to merge 1 commit intoapache:mainfrom
Lunderberg wants to merge 1 commit intoapache:mainfrom
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Prior to this commit, use of the `disco.Session` API to broadcast or scatter an array required several steps from the caller. 1. Allocate memory on worker0 2. Transfer data from the controller to worker0 3. Allocate memory on each worker 4. Broadcast/scatter data from worker0 to all workers While exposing these steps is necessary for performance, especially when used repeatedly, it can be tedious/error-prone to use for initialization that is only performed once. This commit adds utility methods `Session.broadcast` and `Session.scatter`, which are implemented in terms of the existing lower-level methods `Session.broadcast_from_worker0` and `Session.scatter_from_worker0`. These methods perform the transfer from the controller to worker0, and from worker0 to all other workers.
tqchen
approved these changes
May 24, 2024
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Closing to resubmit as a new PR (same issue as mentioned here), due to CI issues. |
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Prior to this commit, use of the
disco.SessionAPI to broadcast or scatter an array required several steps from the caller.While exposing these steps is necessary for performance, especially when used repeatedly, it can be tedious/error-prone to use for initialization that is only performed once.
This commit adds utility methods
Session.broadcastandSession.scatter, which are implemented in terms of the existing lower-level methodsSession.broadcast_from_worker0andSession.scatter_from_worker0. These methods perform the transfer from the controller to worker0, and from worker0 to all other workers.