singa-dev mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From GitBox <...@apache.org>
Subject [GitHub] [singa] dcslin commented on a change in pull request #662: CUDNN LSTM
Date Sat, 11 Apr 2020 13:49:01 GMT
dcslin commented on a change in pull request #662: CUDNN LSTM
URL: https://github.com/apache/singa/pull/662#discussion_r407066234
 
 

 ##########
 File path: python/singa/autograd.py
 ##########
 @@ -3330,6 +3330,94 @@ def step_forward(self, x, h, c, Wx, Wh, Bx, Bh):
         return hout, cout
 
 
+class _RNN(Operation):
+    """ RNN operation with c++ backend
+    """
+    def __init__(self, handle):
+        assert singa.USE_CUDA is True, "Not able to run without CUDA"
+        super(_RNN, self).__init__()
+        self.handle = handle
+
+    def forward(self, x, W):
+        # TODO: CPU forward
+
+        # GPU forward
+        if training:
+            y = singa.GpuRNNForwardTraining(x, W, self.handle)
+            self.inputs = (x, W, y)
+        else:
+            y = singa.GpuRNNForwardInference(x, W, self.handle)
+
+        return y
+
+    def backward(self, dy):
+        assert training is True and hasattr(
+            self, "inputs"), "Please set training as True before do BP. "
+
+        # TODO: CPU backward
+
+        # GPU backward
+        dx = singa.GpuRNNBackwardx(self.inputs[2], dy, self.inputs[1], self.handle)
+        dW = singa.GpuRNNBackwardW(self.inputs[0], self.inputs[2], self.handle)
+        return dx, dW
+
+class RNN_direct(Layer):
 
 Review comment:
   RNN is used for existing highlevel implementation
   After consideration, RNN_direct is used to name newly added C++ backed (cudnn/cpu) RNN

----------------------------------------------------------------
This is an automated message from the Apache Git Service.
To respond to the message, please log on to GitHub and use the
URL above to go to the specific comment.
 
For queries about this service, please contact Infrastructure at:
users@infra.apache.org


With regards,
Apache Git Services

Mime
View raw message