Fix test_Conv2d_groups related errors (SWDEV-416489) (#1269)

* Fix test_Conv2d_groups related errors (SWDEV-416489)

This is due to incorrect atol/rtol settings for torch.half and
torch.bfloat16 data types.

* More adjustment on Navi 32

Author: xinyazhang

test/nn/test_convolution.py

@@ -507,10 +507,11 @@ def test_Conv2d_groups_nobias(self):
             output2 = m2(i2)
             output2.backward(grad_output[:, 2:].contiguous())
 
-            self.assertEqual(output, torch.cat([output1, output2], 1))
+            self.assertEqual(output, torch.cat([output1, output2], 1),
+                             atol=dtype2prec_DONTUSE[dtype], rtol=0)
             self.assertEqual(i.grad.data,
                              torch.cat([i1.grad.data, i2.grad.data], 1),
-                             atol=dtype2prec_DONTUSE[dtype], rtol=0)
+                             atol=1e-1 if dtype == torch.half else dtype2prec_DONTUSE[dtype], rtol=0)
             self.assertEqual(m.weight.grad.data,
                              torch.cat([m1.weight.grad.data, m2.weight.grad.data], 0),
                              atol=1e-1 if dtype == torch.half else dtype2prec_DONTUSE[dtype], rtol=0)
@@ -547,13 +548,14 @@ def test_Conv2d_groups_nobias_v2(self):
             output2 = m2(i2)
             output2.backward(grad_output[:, 8:].contiguous())
 
-            self.assertEqual(output, torch.cat([output1, output2], 1))
+            self.assertEqual(output, torch.cat([output1, output2], 1),
+                             atol=dtype2prec_DONTUSE[dtype], rtol=0)
             self.assertEqual(i.grad.data,
                              torch.cat([i1.grad.data, i2.grad.data], 1),
-                             atol=dtype2prec_DONTUSE[dtype], rtol=0)
+                             atol=1e-1 if dtype == torch.half else dtype2prec_DONTUSE[dtype], rtol=0)
             self.assertEqual(m.weight.grad.data,
                              torch.cat([m1.weight.grad.data, m2.weight.grad.data], 0),
-                             atol=1e-1 if dtype == torch.half else dtype2prec_DONTUSE[dtype], rtol=0)
+                             atol=2e-1 if dtype in [torch.half, torch.bfloat16] else dtype2prec_DONTUSE[dtype], rtol=0)
 
     # CPU-only test for group conv3d fast implementation using bmm
     # See: https://github.com/pytorch/pytorch/pull/36355
@@ -2073,7 +2075,8 @@ def test_Conv2d_naive_groups(self, device, dtype):
         output2 = m2(i2)
         output2.backward(grad_output[:, 2:].contiguous())
 
-        self.assertEqual(output, torch.cat([output1, output2], 1))
+        self.assertEqual(output, torch.cat([output1, output2], 1),
+                         atol=dtype2prec_DONTUSE[dtype], rtol=0)
         self.assertEqual(i.grad.data,
                          torch.cat([i1.grad.data, i2.grad.data], 1),
                          atol=dtype2prec_DONTUSE[dtype], rtol=0)
@@ -2082,7 +2085,7 @@ def test_Conv2d_naive_groups(self, device, dtype):
                          atol=dtype2prec_DONTUSE[dtype], rtol=0)
         self.assertEqual(m.weight.grad.data,
                          torch.cat([m1.weight.grad.data, m2.weight.grad.data], 0),
-                         atol=dtype2prec_DONTUSE[dtype], rtol=0)
+                         atol=1e-1 if dtype == torch.half else dtype2prec_DONTUSE[dtype], rtol=0)
 
     @dtypes(torch.double, torch.cdouble)
     def test_Conv2d_backward_depthwise(self, device, dtype):