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From "Pedro Larroy (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (MXNET-396) MKLDNN: Non deterministic segfault on test_module.py:test_forward_reshape
Date Thu, 03 May 2018 14:45:00 GMT

    [ https://issues.apache.org/jira/browse/MXNET-396?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16462542#comment-16462542
] 

Pedro Larroy commented on MXNET-396:
------------------------------------

(gdb) bt 1
#0 mxnet::same_shape (desc=..., dtype=0, shape=...) at src/ndarray/../operator/tensor/./././../nn/mkldnn/mkldnn_base-inl.h:354
(More stack frames follow...)
(gdb) p desc
$1 = (const mkldnn::memory::desc &) @0x10: <error reading variable>
(gdb) p dtype
$2 = 0
(gdb) p shape
$3 = (const mxnet::TShape &) @0x7f3905a58b50: {<nnvm::Tuple<long>> = {static
kStackCache = <optimized out>, ndim_ = 2, num_heap_allocated_ = 0, 
 data_stack_ = \{20, 1, 139878025134112, 28}, data_heap_ = 0x0}, <No data fields>}
(gdb)

> MKLDNN: Non deterministic segfault on test_module.py:test_forward_reshape 
> --------------------------------------------------------------------------
>
>                 Key: MXNET-396
>                 URL: https://issues.apache.org/jira/browse/MXNET-396
>             Project: Apache MXNet
>          Issue Type: Improvement
>            Reporter: Pedro Larroy
>            Priority: Major
>
> There's random crashes in the given test.
>  
> Even fixing the seeds don't trigger a reproduction:
>  
> + export MXNET_TEST_SEED=11
>  + export MXNET_MODULE_SEED=812478194
>  
> [http://jenkins.mxnet-ci.amazon-ml.com/blue/organizations/jenkins/incubator-mxnet/detail/master/805/pipeline]
>  Was able to reproduce once in a fresh p3 instance with DLAMI
> Another failure with: 
> MXNET_MODULE_SEED=729680784
>  Different machine



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