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From GitBox <...@apache.org>
Subject [GitHub] eric-haibin-lin commented on a change in pull request #8539: expose group2ctx to module
Date Thu, 01 Jan 1970 00:00:00 GMT
eric-haibin-lin commented on a change in pull request #8539: expose group2ctx to module
URL: https://github.com/apache/incubator-mxnet/pull/8539#discussion_r149578224
 
 

 ##########
 File path: tests/python/unittest/test_module.py
 ##########
 @@ -70,6 +70,63 @@ def test_module_input_grads():
     assert np.all(c_grad == 3), c_grad
 
 
+def test_module_ctx_group():
+    with mx.AttrScope(ctx_group='dev1'):
+        a = mx.symbol.Variable('a')
+        a = a * 2
+    with mx.AttrScope(ctx_group='dev2'):
+        b = mx.symbol.Variable('b')
+        c = a + b
+    shape = (2, 5)
+    mod1 = mx.mod.Module(c, context=[mx.cpu(0)], data_names=['a', 'b'], label_names=None,
+                         group2ctxs=[{'dev1':mx.cpu(1),'dev2':mx.cpu(2)}])
+    mod1.bind(data_shapes=[['a', shape], ['b', shape]], inputs_need_grad=True)
+    mod1.init_params()
+    mod1.forward(data_batch=mx.io.DataBatch(data=[mx.nd.ones(shape), mx.nd.ones(shape)]),
is_train=True)
+    mod1.backward([mx.nd.ones(shape)])
+    mod1_input_grads = mod1.get_input_grads()
+
+    mod2 = mx.mod.Module(c, data_names=['a', 'b'], label_names=None)
+    mod2.bind(data_shapes=[['a', shape], ['b', shape]], inputs_need_grad=True)
+    mod2.init_params()
+    mod2.forward(data_batch=mx.io.DataBatch(data=[mx.nd.ones(shape), mx.nd.ones(shape)]),
is_train=True)
+    mod2.backward([mx.nd.ones(shape)])
+    mod2_input_grads = mod2.get_input_grads()
+
+    assert np.all(mod1_input_grads[0].asnumpy() == mod2_input_grads[0].asnumpy())
+    assert np.all(mod1_input_grads[1].asnumpy() == mod2_input_grads[1].asnumpy())
+
+
+def test_bucket_module_ctx_group():
 
 Review comment:
   What does this test against? Anything to assert?

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