[jira] [Updated] (SYSTEMML-1774) Improve Parfor parallelism for deep learning

["Glenn Weidner (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/SYSTEMML-1774?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Glenn Weidner updated SYSTEMML-1774:
------------------------------------
    Fix Version/s:     (was: SystemML 1.0)
                   SystemML 0.15

> Improve Parfor parallelism for deep learning
> --------------------------------------------
>
>                 Key: SYSTEMML-1774
>                 URL: https://issues.apache.org/jira/browse/SYSTEMML-1774
>             Project: SystemML
>          Issue Type: Improvement
>          Components: Algorithms, Compiler, ParFor
>    Affects Versions: SystemML 1.0
>            Reporter: Fei Hu
>            Assignee: Fei Hu
>              Labels: deeplearning
>             Fix For: SystemML 0.15
>
>         Attachments: Explain_For_HYBRID_SPARK_Mode_With_ErrorInfo.txt, Explain_For_Spark_Mode.txt, MNIST_Distrib_Sgd.scala, mnist_lenet_distrib_sgd.dml
>
>
> When running the  [distributed MNIST LeNet example | https://github.com/apache/systemml/blob/master/scripts/nn/examples/mnist_lenet_distrib_sgd.dml], each mini-batch could ideally run in parallel without interaction. We try to force {{parfor (j in 1:parallel_batches)}} at line 137 of {{nn/examples/mnist_lenet_distrib_sgd.dml}} to be {{parfor (j in 1:parallel_batches, mode=REMOTE_SPARK, opt=CONSTRAINED)}} use {{REMOTE_SPARK}} mode, but got some errors about {{org.apache.sysml.runtime.DMLRuntimeException: Not supported: Instructions of type other than CP instructions}} using the mode {{SPARK}}, and the error {{java.lang.NullPointerException}} using the mode {{HYBRID_SPARK}}. More log information can be found at the following comments. 



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