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https://issues.apache.org/jira/browse/SYSTEMML-1774?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16090771#comment-16090771
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Fei Hu edited comment on SYSTEMML-1774 at 7/17/17 11:20 PM:
------------------------------------------------------------
This issue can be reproduced by using the attached files
{{mnist_lenet_distrib_sgd.dml}} and {{MNIST_Distrib_Sgd.scala}}. The errors and
explaining information for the {{SPARK}} and {{HYBRID_SPARK}} modes are also
attached.
was (Author: tenma):
This issue can be reproduced by using the attached files
{{mnist_lenet_distrib_sgd.dml}} and {{MNIST_Distrib_Sgd.scala}}
> 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
> Labels: deeplearning
> 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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