Optimize error message of mean_op and matmul_op, test=release/1.6 (#20434)

* add data type check, test=develop

* polish error messages, test=develop

* polish error messages, test=develop

* Remove support for the CPU architecture matmul, test=develop

* fix syntax bug, test=develop

paddle/fluid/operators/matmul_op.cc

@@ -21,6 +21,17 @@ limitations under the License. */
 
 namespace paddle {
 namespace operators {
+
+/**
+ * Printing shape information into a string is easy to use.
+ */
+inline static std::string DumpMatrixShape(const math::MatDescriptor &desc) {
+  std::stringstream buffer;
+  buffer << "[" << desc.batch_size_ << ", " << desc.height_ << ", "
+         << desc.width_ << "]";
+  return buffer.str();
+}
+
 /**
  * Get row matrix shape from a vector shape. If the rank of x_dim > 1, the
  * original x_dim is returned.
@@ -303,21 +314,37 @@ class MatMulOp : public framework::OperatorWithKernel {
                                      context->Attrs().Get<bool>("transpose_Y"));
 
     if (context->IsRuntime()) {
-      PADDLE_ENFORCE(mat_dim_x.batch_size_ == mat_dim_y.batch_size_ ||
-                     mat_dim_x.batch_size_ == 0 || mat_dim_y.batch_size_ == 0);
+      PADDLE_ENFORCE(
+          mat_dim_x.batch_size_ == mat_dim_y.batch_size_ ||
+              mat_dim_x.batch_size_ == 0 || mat_dim_y.batch_size_ == 0,
+          "ShapeError: The batch size of the two matrices should be equal, or "
+          "at least one is zero.\n"
+          "But received X's shape: %s, Y's shape: %s.",
+          DumpMatrixShape(mat_dim_x).c_str(),
+          DumpMatrixShape(mat_dim_y).c_str());
     }
     std::vector<int64_t> dim_out;
     int64_t dim_out_y = mat_dim_y.width_;
 #if defined(PADDLE_WITH_MKLML) && !defined(PADDLE_WITH_CUDA)
     int head_number = context->Attrs().Get<int>("head_number");
     bool split_vertical_y = (mat_dim_x.width_ != mat_dim_y.height_);
-    PADDLE_ENFORCE_LE(head_number, mat_dim_x.width_);
+    PADDLE_ENFORCE_LE(
+        head_number, mat_dim_x.width_,
+        "ShapeError: Unsatisfied mkl acceleration library requirements: "
+        "The number of heads "
+        "(%d) must be equal to X's width. But received X's shape: %s.",
+        head_number, DumpMatrixShape(mat_dim_x).c_str());
 
     if (!split_vertical_y && head_number > 0) {
       dim_out_y = head_number * mat_dim_y.width_;
     }
 #else
-    PADDLE_ENFORCE_EQ(mat_dim_x.width_, mat_dim_y.height_);
+    PADDLE_ENFORCE_EQ(
+        mat_dim_x.width_, mat_dim_y.height_,
+        "ShapeError: Input X's width should be equal to the Y's height, "
+        "but received X's shape: %s,"
+        "Y's shape: %s.",
+        DumpMatrixShape(mat_dim_x).c_str(), DumpMatrixShape(mat_dim_y).c_str());
 #endif
 
     if (mat_dim_x.batch_size_ != 0) {
@@ -461,15 +488,11 @@ REGISTER_OPERATOR(matmul, ops::MatMulOp, ops::MatMulOpMaker,
 REGISTER_OPERATOR(matmul_grad, ops::MatMulOpGrad);
 REGISTER_OP_CPU_KERNEL(
     matmul, ops::MatMulKernel<paddle::platform::CPUDeviceContext, float>,
-    ops::MatMulKernel<paddle::platform::CPUDeviceContext, double>,
-    ops::MatMulKernel<paddle::platform::CPUDeviceContext,
-                      paddle::platform::float16>);
+    ops::MatMulKernel<paddle::platform::CPUDeviceContext, double>);
 REGISTER_OP_CPU_KERNEL(
     matmul_grad,
     ops::MatMulGradKernel<paddle::platform::CPUDeviceContext, float>,
-    ops::MatMulGradKernel<paddle::platform::CPUDeviceContext, double>,
-    ops::MatMulGradKernel<paddle::platform::CPUDeviceContext,
-                          paddle::platform::float16>);
+    ops::MatMulGradKernel<paddle::platform::CPUDeviceContext, double>);
 
 #ifdef PADDLE_WITH_CUDA
 REGISTER_OP_CUDA_KERNEL(

python/paddle/fluid/layers/nn.py

@@ -6749,6 +6749,22 @@ def matmul(x, y, transpose_x=False, transpose_y=False, alpha=1.0, name=None):
     """
 
     def __check_input(x, y):
+        var_names = {'x': x, 'y': y}
+        for name, val in var_names.items():
+            if not isinstance(val, Variable):
+                raise TypeError(
+                    "The type of %s in matmul must be Variable, but received %s.\n"
+                    % (name, (type(val))))
+            if convert_dtype(val.dtype) in ['float16']:
+                warnings.warn(
+                    "The data type of %s in matmul only support float16 in GPU now."
+                    % name)
+            if convert_dtype(
+                    val.dtype) not in ['float16', 'float32', 'float64']:
+                raise TypeError(
+                    "The data type of %s in matmul must be float16 or float32 or float64, but received %s.\n"
+                    % (name, (convert_dtype(val.dtype))))
+
         x_shape = list(x.shape)
         y_shape = list(y.shape)
         if len(x_shape) == 1:
@@ -6762,7 +6778,10 @@ def matmul(x, y, transpose_x=False, transpose_y=False, alpha=1.0, name=None):
         if transpose_y:
             y_shape[-2], y_shape[-1] = y_shape[-1], y_shape[-2]
         if x_shape[-1] != y_shape[-2]:
-            raise ValueError("Invalid inputs for matmul. x: %s, y: %s\n" %
+            raise ValueError(
+                "After performing an optional transpose, Input X's width should be "
+                "equal to Y's width for multiplication "
+                "prerequisites. But received X's shape: %s, Y's shape: %s\n" %
                 (x_shape, y_shape))
 
         if len(y_shape) > 2 and len(x_shape) > 2:
@@ -6771,8 +6790,11 @@ def matmul(x, y, transpose_x=False, transpose_y=False, alpha=1.0, name=None):
                 if dim_x < 0 or y_shape[i] < 0:
                     continue
                 if dim_x != y_shape[i]:
-                    raise ValueError("Invalid inputs for matmul. x(%s), y(%s)" %
-                                     (x.shape, y.shape))
+                    raise ValueError(
+                        "When the matrix is larger than 2 dimensions, the higher "
+                        "dimensional values of the two matrices need to be equal. "
+                        "But received x_shape[%d] != y_shape[%d]. X's shape: %s, "
+                        "Y's shape: %s.\n" % (i, i, x_shape, y_shape))
 
     __check_input(x, y)
 
@@ -14588,6 +14610,20 @@ def mean(x, name=None):
 
     helper = LayerHelper("mean", **locals())
 
+    if not isinstance(x, Variable):
+        raise TypeError(
+            "The type of 'x' in mean must be Variable, but received %s.\n" %
+            (type(x)))
+
+    if convert_dtype(x.dtype) in ['float16']:
+        warnings.warn(
+            "The data type of 'x' in mean only support float16 in GPU now.")
+
+    if convert_dtype(x.dtype) not in ['float16', 'float32', 'float64']:
+        raise TypeError(
+            "The data type of 'x' in mean must be float16 or float32 or float64, but received %s.\n"
+            % (convert_dtype(x.dtype)))
+
     if name is None:
         out = helper.create_variable_for_type_inference(dtype=x.dtype)
     else:

python/paddle/fluid/tests/unittests/test_matmul_op.py

@@ -17,6 +17,8 @@ from __future__ import print_function
 import unittest
 import numpy as np
 from op_test import OpTest
+import paddle.fluid as fluid
+from paddle.fluid import Program, program_guard
 
 
 def generate_compatible_shapes(dim_X, dim_Y, transpose_X, transpose_Y):
@@ -112,6 +114,21 @@ class Generator(object):
             ['X'], 'Out', max_relative_error=1e-3, no_grad_set=set('Y'))
 
 
+class TestMatmulOpError(OpTest):
+    def test_errors(self):
+        with program_guard(Program(), Program()):
+            # The inputs type of matmul_op must be Variable.
+            input1 = 12
+            self.assertRaises(TypeError, fluid.layers.matmul, input1, input1)
+            # The inputs dtype of matmul_op must be float32, float64.
+            input2 = fluid.layers.data(
+                name='input2', shape=[10, 10], dtype="int32")
+            self.assertRaises(TypeError, fluid.layers.matmul, input2, input2)
+            input3 = fluid.layers.data(
+                name='input3', shape=[2, 2], dtype="float16")
+            fluid.layers.matmul(input3, input3)
+
+
 # Generate test cases for all possibilities
 def inject_test(dim_x, dim_y, trans_x, trans_y):
     test_name = ('TestMatMulOp_dimX_{}_dim_Y_{}_transX_{}_transY_{}'.format(

python/paddle/fluid/tests/unittests/test_mean_op.py

@@ -18,6 +18,8 @@ import unittest
 import numpy as np
 from op_test import OpTest
 import paddle.fluid.core as core
+import paddle.fluid as fluid
+from paddle.fluid import Program, program_guard
 
 
 class TestMeanOp(OpTest):
@@ -38,6 +40,21 @@ class TestMeanOp(OpTest):
         self.check_grad(['X'], 'Out')
 
 
+class TestMeanOpError(OpTest):
+    def test_errors(self):
+        with program_guard(Program(), Program()):
+            # The input type of mean_op must be Variable.
+            input1 = 12
+            self.assertRaises(TypeError, fluid.layers.mean, input1)
+            # The input dtype of mean_op must be float16, float32, float64.
+            input2 = fluid.layers.data(
+                name='input2', shape=[12, 10], dtype="int32")
+            self.assertRaises(TypeError, fluid.layers.mean, input2)
+            input3 = fluid.layers.data(
+                name='input3', shape=[4], dtype="float16")
+            fluid.layers.softmax(input3)
+
+
 @unittest.skipIf(not core.is_compiled_with_cuda(),
                  "core is not compiled with CUDA")
 class TestFP16MeanOp(TestMeanOp):