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Posted to commits@mxnet.apache.org by GitBox <gi...@apache.org> on 2018/11/13 02:25:40 UTC
[GitHub] roywei opened a new issue #13243: CPP examples training acc does
not increase
roywei opened a new issue #13243: CPP examples training acc does not increase
URL: https://github.com/apache/incubator-mxnet/issues/13243
## Description
I found this problem in PR: https://github.com/apache/incubator-mxnet/pull/13185
Following examples here:
https://github.com/apache/incubator-mxnet/tree/master/cpp-package/example
During traing, the acc actually does not change at all.
Right now affected models:
1. inception-bn
2. resnet
will continue to check other models
## Error Message:
```
[02:17:51] src/io/iter_mnist.cc:110: MNISTIter: load 60000 images, shuffle=1, shape=(50,784)
[02:17:52] src/io/iter_mnist.cc:110: MNISTIter: load 10000 images, shuffle=1, shape=(50,784)
[02:17:52] resnet.cpp:199: Epoch: 0
[02:18:06] resnet.cpp:219: Train Accuracy: 0.0987167
[02:18:08] resnet.cpp:230: Validation Accuracy: 0.098
[02:18:08] resnet.cpp:199: Epoch: 1
[02:18:22] resnet.cpp:219: Train Accuracy: 0.0987167
[02:18:24] resnet.cpp:230: Validation Accuracy: 0.098
[02:18:24] resnet.cpp:199: Epoch: 2
[02:18:38] resnet.cpp:219: Train Accuracy: 0.0987167
[02:18:40] resnet.cpp:230: Validation Accuracy: 0.098
[02:18:40] resnet.cpp:199: Epoch: 3
[02:18:54] resnet.cpp:219: Train Accuracy: 0.0987167
[02:18:56] resnet.cpp:230: Validation Accuracy: 0.098
```
## Minimum reproducible example
(If you are using your own code, please provide a short script that reproduces the error. Otherwise, please provide link to the existing example.)
## Steps to reproduce
follow:
https://github.com/apache/incubator-mxnet/tree/master/cpp-package/example
run
```
./resnet
```
## What have you tried to solve it?
1. changing learning rate and weight decay does not help.
2. changed to `sgd` optimizer instead of deprecated `ccsgd` does not help.
3. used same setup in python version, python works fine acc increased every epoch, cpp does not.
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