Optimize the cache fetch for forward split, pt. 2A #2289
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Summary:
This follows up the work on D51865590 by plumbing the
uvm_cache_stats
argument passing up to the Python API level.local_uvm_cache_stats
is now zeroed out before the prefetch step as opposed to after, to allow for the data to be passed into the forward step.This is a re-attempt of landing D51995949 with additions copied from D52670550
Differential Revision: D53113564