[GitHub] [singa] dcslin commented on pull request #792: half float update

[GitBox <gi...@apache.org>]

dcslin commented on pull request #792:
URL: https://github.com/apache/singa/pull/792#issuecomment-688418118


   current result:
   - [x] training with fp16 ok, with graph, comparable accuracy, faster computation, less memory
   - [x] tensor cuda backend generic support on fp16 with broadcast
   - [ ] review operations resuing float32 
   ```
   root@1c6aaef3db53:~/singa-hp2# PYTHONPATH=build/python/ python3 examples/cnn/train_cnn.py mlp mnist -m5
   Starting Epoch 0:
   Training loss = 446.399231, training accuracy = 0.870331
   Evaluation accuracy = 0.922676, Elapsed Time = 4.054065s
   Starting Epoch 1:
   Training loss = 246.745819, training accuracy = 0.926194
   Evaluation accuracy = 0.938301, Elapsed Time = 3.921566s
   Starting Epoch 2:
   Training loss = 201.893021, training accuracy = 0.939384
   Evaluation accuracy = 0.944611, Elapsed Time = 3.735095s
   Starting Epoch 3:
   Training loss = 171.419769, training accuracy = 0.948289
   Evaluation accuracy = 0.952524, Elapsed Time = 3.625971s
   Starting Epoch 4:
   Training loss = 149.009338, training accuracy = 0.955326
   Evaluation accuracy = 0.956530, Elapsed Time = 3.582685s
   root@1c6aaef3db53:~/singa-hp2# PYTHONPATH=build/python/ python3 examples/cnn/train_cnn.py mlp mnist -m5 -pfloat16
   Starting Epoch 0:
   Training loss = 447.799744, training accuracy = 0.869547
   Evaluation accuracy = 0.922075, Elapsed Time = 3.899604s
   Starting Epoch 1:
   Training loss = 249.704956, training accuracy = 0.925110
   Evaluation accuracy = 0.937300, Elapsed Time = 2.524199s
   Starting Epoch 2:
   Training loss = 206.520721, training accuracy = 0.938334
   Evaluation accuracy = 0.942809, Elapsed Time = 2.410751s
   Starting Epoch 3:
   Training loss = 177.916901, training accuracy = 0.946538
   Evaluation accuracy = 0.950120, Elapsed Time = 2.390487s
   Starting Epoch 4:
   Training loss = 157.046936, training accuracy = 0.952958
   Evaluation accuracy = 0.954828, Elapsed Time = 2.396067s
   root@1c6aaef3db53:~/singa-hp2# 
   ```


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