refactor: KOS and preprocessing traits #155
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* refactor: KOS and preprocessing traits * add bounds to preprocess error * rename pd field
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* refactor: KOS and preprocessing traits * add bounds to preprocess error * rename pd field
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This PR adds traits for the preprocessing model and also updates KOS to implement random OT for any
Standard: Distribution<T>type.Allocatetrait rationaleIt is difficult to properly model preprocessing in the case where a functionality is shared by multiple others. One approach would be to update the
preprocessfunction so that it has acountargument then use some sort of asyncBarrierfor synchronization. That approach doesn't work in the case where multiplexing isn't available (only 1 context).The approach I settled on was to decouple reserving capacity step from execution of the preprocessing. The implemented model is 2 steps:
Allocate, which allocate what they need from the sub-protocol. This process does not requires synchronization.Preprocessis called which actually executes the preprocessing all batched together.Modeling it this way works for both cases where a functionality is "shared" or owned directly by another protocol.
Side note: Once we have SoftSpoken which can be extended multiple times, we should be able to just share the base OT and perform OT extensions in parallel instead of this batching. This will remove the need for shared state synchronization and be more performant in terms of latency and compute.