[GitHub] [incubator-mxnet] ChaiBapchya commented on a change in pull request #18784: [1.x][LT] Add forward, backward test for linalg.gemm2

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

ChaiBapchya commented on a change in pull request #18784:
URL: https://github.com/apache/incubator-mxnet/pull/18784#discussion_r461134108



##########
File path: tests/nightly/test_large_array.py
##########
@@ -1207,9 +1207,28 @@ def check_syrk_batch():
         assert A.grad[0,0,0] == 4
         assert_almost_equal(A.grad[1,0,0], nd.array([0.4]), rtol=1e-3, atol=1e-5)
 
+    def check_gemm2():
+        def run_gemm2(inp1,inp2):
+            inp1.attach_grad()
+            inp2.attach_grad()
+            with mx.autograd.record():
+                out = mx.nd.linalg.gemm2(inp1,inp2)
+            return inp1.grad, inp2.grad, out
+
+        inp1=mx.nd.ones(shape=(SMALL_Y, LARGE_X))
+        inp1[0][0]=0.1
+        inp2=mx.nd.ones(shape=(LARGE_X, SMALL_Y))
+        inp1_grad, inp2_grad, out= run_gemm2(inp1,inp2)
+        assert out.asnumpy()[0][0] == LARGE_X
+        out.backward()
+        assert inp1_grad.asnumpy()[0][0] == SMALL_Y
+        assert_almost_equal(inp2_grad.asnumpy()[0][0],49.1)
+

Review comment:
       Added




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