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From "Matthias Boehm (JIRA)" <j...@apache.org>
Subject [jira] [Created] (SYSTEMML-1904) More aggressive dynamic recompilation w/ codegen
Date Tue, 12 Sep 2017 07:01:00 GMT
Matthias Boehm created SYSTEMML-1904:
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             Summary: More aggressive dynamic recompilation w/ codegen
                 Key: SYSTEMML-1904
                 URL: https://issues.apache.org/jira/browse/SYSTEMML-1904
             Project: SystemML
          Issue Type: Sub-task
            Reporter: Matthias Boehm


This task aims to improve scenarios where we currently disable - despite unknown dimensions
- dynamic recompilation too eagerly due to good worst-case estimates, which hurts performance
in case of codegen. This is because the cost-based codegen optimizer requires sizes for validity
conditions and cost estimates.

Accordingly, if codegen is enabled, we flag operations as requires recompile in case of unknown
dimensions even if we were able to compile these operations to CP.



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