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Posted to commits@mxnet.apache.org by GitBox <gi...@apache.org> on 2019/05/13 20:03:08 UTC
[GitHub] [incubator-mxnet] jschmitz28 opened a new issue #14939: MXNet
silently produces bad results (all zeroes) when allocating NDArray larger
than 2^32 in size via random_normal
jschmitz28 opened a new issue #14939: MXNet silently produces bad results (all zeroes) when allocating NDArray larger than 2^32 in size via random_normal
URL: https://github.com/apache/incubator-mxnet/issues/14939
## Description
MXNet silently produces bad results (all zeroes) when allocating NDArray larger than 2^32 in size via random_normal().
## Environment info (Required)
Base deep learning AMI on AWS: ami-01ac4e28da63bac3c
[ec2-user@ip-10-2-68-132 ~]$ source activate mxnet_p36
(mxnet_p36) [ec2-user@ip-10-2-68-132 ~]$ python diagnose.py
----------Python Info----------
Version : 3.6.5
Compiler : GCC 7.2.0
Build : ('default', 'Apr 29 2018 16:14:56')
Arch : ('64bit', '')
------------Pip Info-----------
Version : 10.0.1
Directory : /home/ec2-user/anaconda3/envs/mxnet_p36/lib/python3.6/site-packages/pip
----------MXNet Info-----------
Version : 1.4.0
Directory : /home/ec2-user/anaconda3/envs/mxnet_p36/lib/python3.6/site-packages/mxnet
Commit Hash : a03d59ed867ba334d78d61246a1090cd1868f5da
----------System Info----------
Platform : Linux-4.14.104-78.84.amzn1.x86_64-x86_64-with-glibc2.9
system : Linux
node : ip-10-2-68-132
release : 4.14.104-78.84.amzn1.x86_64
version : #1 SMP Mon Mar 4 19:19:37 UTC 2019
----------Hardware Info----------
machine : x86_64
processor : x86_64
Architecture: x86_64
CPU op-mode(s): 32-bit, 64-bit
Byte Order: Little Endian
CPU(s): 8
On-line CPU(s) list: 0-7
Thread(s) per core: 2
Core(s) per socket: 4
Socket(s): 1
NUMA node(s): 1
Vendor ID: GenuineIntel
CPU family: 6
Model: 79
Model name: Intel(R) Xeon(R) CPU E5-2686 v4 @ 2.30GHz
Stepping: 1
CPU MHz: 2702.223
BogoMIPS: 4600.12
Hypervisor vendor: Xen
Virtualization type: full
L1d cache: 32K
L1i cache: 32K
L2 cache: 256K
L3 cache: 46080K
NUMA node0 CPU(s): 0-7
----------Network Test----------
Setting timeout: 10
Timing for MXNet: https://github.com/apache/incubator-mxnet, DNS: 0.0023 sec, LOAD: 0.8111 sec.
Timing for Gluon Tutorial(en): http://gluon.mxnet.io, DNS: 0.0007 sec, LOAD: 0.0224 sec.
Timing for Gluon Tutorial(cn): https://zh.gluon.ai, DNS: 0.0006 sec, LOAD: 0.3334 sec.
Timing for FashionMNIST: https://apache-mxnet.s3-accelerate.dualstack.amazonaws.com/gluon/dataset/fashion-mnist/train-labels-idx1-ubyte.gz, DNS: 0.0007 sec, LOAD: 0.1205 sec.
Timing for PYPI: https://pypi.python.org/pypi/pip, DNS: 0.0020 sec, LOAD: 0.0719 sec.
Timing for Conda: https://repo.continuum.io/pkgs/free/, DNS: 0.0007 sec, LOAD: 0.0281 sec.
## Error Message:
None (although I would prefer if there were an error compared to bad results)
## Minimum reproducible example
source activate mxnet_p36 && python -c 'import mxnet; print(mxnet.nd.random_normal(shape=(42949672,50)))'
[[0. 0. 0. ... 0. 0. 0.]
[0. 0. 0. ... 0. 0. 0.]
[0. 0. 0. ... 0. 0. 0.]
...
[0. 0. 0. ... 0. 0. 0.]
[0. 0. 0. ... 0. 0. 0.]
[0. 0. 0. ... 0. 0. 0.]]
<NDArray 42949672x50 @cpu(0)>
## Steps to reproduce
1. Launch p3.2xlarge with base deep learning AMI
2. source activate mxnet_p36 && python -c 'import mxnet; print(mxnet.nd.random_normal(shape=(42949672,50)))'
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