[jira] [Created] (SYSTEMML-1389) Update API: Pass In All Outputs From `forward` To `backward` for Performance

["Mike Dusenberry (JIRA)" <ji...@apache.org>]

Mike Dusenberry created SYSTEMML-1389:
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             Summary: Update API: Pass In All Outputs From `forward` To `backward` for Performance
                 Key: SYSTEMML-1389
                 URL: https://issues.apache.org/jira/browse/SYSTEMML-1389
             Project: SystemML
          Issue Type: Sub-task
            Reporter: Mike Dusenberry


Currently, we do not pass the outputs of the {{forward}} functions to the {{backward}} functions in the {{nn}} library.  Many of the layers do not need the outputs, but a few current ones, and possible future ones, could benefit from having access to the outputs.  This aims to update the {{backward}} API to include (1) all upstream derivatives, (2) all outputs from {{forward}}, (3) all inputs to {{forward}}.  Effectively, this would be equivalent to having a class object that maintains all configuration and input + output tensors.

cc [~niketanpansare]  This will require changes to the Barista API, but I believe it will be beneficial for performance.



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