RomanSteinberg commented on issue #16134: Incorrect subtraction
URL: 
https://github.com/apache/incubator-mxnet/issues/16134#issuecomment-530268559
 
 
   There are 2 computers with GPU and 2 without. All have linux installed and 
python works in virtual environments. For simplification, I will consider only 
two computers which have GPU on-board. Computer `deploy` has a problem and I 
provided info about it below. My computer (`roman`) environment is as follows:
   
   ----------Python Info----------
   Version      : 3.6.7
   Compiler     : GCC 8.2.0
   Build        : ('default', 'Oct 22 2018 11:32:17')
   Arch         : ('64bit', 'ELF')
   ------------Pip Info-----------
   Version      : 19.2.3
   Directory    : /home/roman/dev/venv/lib/python3.6/site-packages/pip
   ----------MXNet Info-----------
   Version      : 1.4.1
   Directory    : /home/roman/dev/venv/lib/python3.6/site-packages/mxnet
   Commit hash file 
"/home/roman/dev/venv/lib/python3.6/site-packages/mxnet/COMMIT_HASH" not found. 
Not installed from pre-built package or built from source.
   Library      : 
['/home/roman/dev/venv/lib/python3.6/site-packages/mxnet/libmxnet.so']
   Build features:
   No runtime build feature info available
   ----------System Info----------
   Platform     : Linux-5.0.0-27-generic-x86_64-with-Ubuntu-18.04-bionic
   system       : Linux
   node         : vs-roman
   release      : 5.0.0-27-generic
   version      : #28~18.04.1-Ubuntu SMP Thu Aug 22 03:00:32 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):              4
   On-line CPU(s) list: 0-3
   Thread(s) per core:  1
   Core(s) per socket:  4
   Socket(s):           1
   NUMA node(s):        1
   Vendor ID:           GenuineIntel
   CPU family:          6
   Model:               158
   Model name:          Intel(R) Core(TM) i5-7400 CPU @ 3.00GHz
   Stepping:            9
   CPU MHz:             3398.450
   CPU max MHz:         3500.0000
   CPU min MHz:         800.0000
   BogoMIPS:            6000.00
   Virtualization:      VT-x
   L1d cache:           32K
   L1i cache:           32K
   L2 cache:            256K
   L3 cache:            6144K
   NUMA node0 CPU(s):   0-3
   Flags:               fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge 
mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe syscall nx 
pdpe1gb rdtscp lm constant_tsc art arch_perfmon pebs bts rep_good nopl 
xtopology nonstop_tsc cpuid aperfmperf tsc_known_freq pni pclmulqdq dtes64 
monitor ds_cpl vmx est tm2 ssse3 sdbg fma cx16 xtpr pdcm pcid sse4_1 sse4_2 
x2apic movbe popcnt tsc_deadline_timer aes xsave avx f16c rdrand lahf_lm abm 
3dnowprefetch cpuid_fault invpcid_single pti ssbd ibrs ibpb stibp tpr_shadow 
vnmi flexpriority ept vpid ept_ad fsgsbase tsc_adjust bmi1 avx2 smep bmi2 erms 
invpcid mpx rdseed adx smap clflushopt intel_pt xsaveopt xsavec xgetbv1 xsaves 
dtherm ida arat pln pts hwp hwp_notify hwp_act_window hwp_epp md_clear flush_l1d
   ----------Network Test----------
   Setting timeout: 10
   Timing for MXNet: https://github.com/apache/incubator-mxnet, DNS: 0.0007 
sec, LOAD: 0.8725 sec.
   Timing for Gluon Tutorial(en): http://gluon.mxnet.io, DNS: 0.2035 sec, LOAD: 
1.1684 sec.
   Timing for Gluon Tutorial(cn): https://zh.gluon.ai, DNS: 0.2429 sec, LOAD: 
1.0129 sec.
   Timing for FashionMNIST: 
https://apache-mxnet.s3-accelerate.dualstack.amazonaws.com/gluon/dataset/fashion-mnist/train-labels-idx1-ubyte.gz,
 DNS: 0.0824 sec, LOAD: 1.0680 sec.
   Timing for PYPI: https://pypi.python.org/pypi/pip, DNS: 0.0018 sec, LOAD: 
0.9863 sec.
   Timing for Conda: https://repo.continuum.io/pkgs/free/, DNS: 0.1887 sec, 
LOAD: 0.3513 sec.
   ----------Environment----------
   KMP_DUPLICATE_LIB_OK="True"
   
   ### PyQt5 (pip show pyqt5)
   
   Name: PyQt5
   Version: 5.12.1
   Summary: Python bindings for the Qt cross platform UI and application toolkit
   Home-page: https://www.riverbankcomputing.com/software/pyqt/
   Author: Riverbank Computing Limited
   Author-email: i...@riverbankcomputing.com
   License: GPL v3
   Location: /home/roman/dev/venv/lib/python3.6/site-packages
   Requires: PyQt5-sip
   Required-by: PyQtWebEngine, PyQt5-stubs
   
   `PyQt5`  is the same on both computers. 
   > How does the 4th computer on which you cant repro differ from the other 3 
on which you experience the issue?
   I ask myself this question for several days. And I didn't figured it out yet.
   

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