fix code problem

[yajiedesign]

No description provided.

[yajiedesign]

@Javelinjs some test error with Scala
src/operator/operator_util.cc:611: Check failed: (lhs.ctx()) == (rhs.ctx()) operands context mismatch (4,5) vs. (4,5)
Is not because the model parallel, it has no need to detect whether the context is the same?

[tqchen]

implicit constructor do not have to be called

[tqchen]

change shape to context

[tqchen]

The scalar error seems to due to problem of using binary op for tensors from different devices, which is forbided and detected by the changes @yajiedesign added.

@Javelinjs can you look a bit into it? @yajiedesign it is also OK if you can simply remove that testcase for now

[yzhliu]

Sorry for the late reply. @yajiedesign Could you help to patch the following diff?

diff --git a/scala-package/core/src/test/scala/ml/dmlc/mxnet/ModelParallelSuite.scala b/scala-package/core/src/test/scala/ml/dmlc/mxnet/ModelParallelSuite.scala
index afbcdca..48dfaef 100644
--- a/scala-package/core/src/test/scala/ml/dmlc/mxnet/ModelParallelSuite.scala
+++ b/scala-package/core/src/test/scala/ml/dmlc/mxnet/ModelParallelSuite.scala
@@ -47,7 +47,8 @@ class ModelParallelSuite extends FunSuite with BeforeAndAfterAll {

     exec1.forward()
     exec2.forward()
-    assert(reldiff(exec1.outputs(0), exec2.outputs(0)) < 1e-6f)
+    assert(reldiff(exec1.outputs(0).copyTo(Context.cpu()),
+      exec2.outputs(0).copyTo(Context.cpu())) < 1e-6f)

     val outGrad = NDArray.ones(shape, Context.cpu(1))
     exec1.backward(Array(outGrad))

[yajiedesign]

@Javelinjs yes ok