[cherry-pick] improve perfomance of cast and tril op

paddle/fluid/operators/cast_op.cu

@@ -19,6 +19,43 @@ limitations under the License. */
 namespace paddle {
 namespace operators {
 
+// aligned vector generates vectorized load/store on CUDA
+template <typename T, int Size>
+struct alignas(sizeof(T) * Size) AlignedVector {
+  T val[Size];
+};
+
+template <typename T>
+inline int VectorizedSize(const T* pointer) {
+  uint64_t address = reinterpret_cast<uint64_t>(pointer);
+  constexpr int vec4 = std::alignment_of<AlignedVector<T, 4>>::value;  // NOLINT
+  if (address % vec4 == 0) {
+    return 4;
+  }
+  return 1;
+}
+
+template <typename InT, typename OutT, int VecSize>
+__global__ void VecCastCUDAKernel(const InT* in, const int64_t N, OutT* out) {
+  int64_t idx = blockDim.x * blockIdx.x + threadIdx.x;
+  using LoadT = AlignedVector<InT, VecSize>;
+  using StoreT = AlignedVector<OutT, VecSize>;
+  for (int i = idx * VecSize; i < N; i += blockDim.x * gridDim.x * VecSize) {
+    InT in_vec[VecSize];
+    LoadT* in_value = reinterpret_cast<LoadT*>(&in_vec);
+    *in_value = *reinterpret_cast<const LoadT*>(&in[i]);
+
+    OutT out_vec[VecSize];
+#pragma unroll
+    for (int ii = 0; ii < VecSize; ii++) {
+      out_vec[ii] = static_cast<OutT>(in_vec[ii]);
+    }
+
+    *(reinterpret_cast<StoreT*>(&out[i])) =
+        *reinterpret_cast<StoreT*>(&out_vec[0]);
+  }
+}
+
 template <typename InT, typename OutT>
 __global__ void CastCUDAKernel(const InT* in, const int64_t N, OutT* out) {
   CUDA_KERNEL_LOOP(index, N) { out[index] = static_cast<OutT>(in[index]); }
@@ -40,8 +77,16 @@ struct CastOpFunctor<platform::CUDADeviceContext, InT> {
     auto* out = out_->mutable_data<OutT>(ctx_.GetPlace());
     platform::GpuLaunchConfig config =
         platform::GetGpuLaunchConfig1D(ctx_, size);
-    CastCUDAKernel<InT, OutT><<<config.block_per_grid, config.thread_per_block,
-                                0, ctx_.stream()>>>(in, size, out);
+    int vec_size = VectorizedSize<OutT>(out);
+    if (!std::is_same<InT, OutT>::value && vec_size == 4 && size % 4 == 0) {
+      VecCastCUDAKernel<InT, OutT, 4><<<
+          config.block_per_grid, config.thread_per_block, 0, ctx_.stream()>>>(
+          in, size, out);
+    } else {
+      CastCUDAKernel<InT, OutT><<<config.block_per_grid,
+                                  config.thread_per_block, 0, ctx_.stream()>>>(
+          in, size, out);
+    }
   }
 };
 

paddle/fluid/operators/tril_triu_op.cc

@@ -99,6 +99,7 @@ class TrilTriuGradOpMaker : public framework::SingleGradOpMaker<T> {
 }  // namespace paddle
 
 namespace ops = paddle::operators;
+namespace plat = paddle::platform;
 REGISTER_OPERATOR(tril_triu, ops::TrilTriuOp, ops::TrilTriuOpMaker,
                   ops::TrilTriuGradOpMaker<paddle::framework::OpDesc>,
                   ops::TrilTriuGradOpMaker<paddle::imperative::OpBase>);
@@ -107,10 +108,13 @@ REGISTER_OP_CPU_KERNEL(
     tril_triu, ops::TrilTriuOpKernel<paddle::platform::CPUDeviceContext, float>,
     ops::TrilTriuOpKernel<paddle::platform::CPUDeviceContext, double>,
     ops::TrilTriuOpKernel<paddle::platform::CPUDeviceContext, int>,
-    ops::TrilTriuOpKernel<paddle::platform::CPUDeviceContext, int64_t>);
+    ops::TrilTriuOpKernel<paddle::platform::CPUDeviceContext, int64_t>,
+    ops::TrilTriuOpKernel<paddle::platform::CPUDeviceContext, plat::float16>);
 REGISTER_OP_CPU_KERNEL(
     tril_triu_grad,
     ops::TrilTriuGradOpKernel<paddle::platform::CPUDeviceContext, float>,
     ops::TrilTriuGradOpKernel<paddle::platform::CPUDeviceContext, double>,
     ops::TrilTriuGradOpKernel<paddle::platform::CPUDeviceContext, int>,
-    ops::TrilTriuGradOpKernel<paddle::platform::CPUDeviceContext, int64_t>);
+    ops::TrilTriuGradOpKernel<paddle::platform::CPUDeviceContext, int64_t>,
+    ops::TrilTriuGradOpKernel<paddle::platform::CPUDeviceContext,
+                              plat::float16>);

paddle/fluid/operators/tril_triu_op.cu

@@ -15,16 +15,20 @@ limitations under the License. */
 #include "paddle/fluid/operators/tril_triu_op.h"
 
 namespace ops = paddle::operators;
+namespace plat = paddle::platform;
 
 REGISTER_OP_CUDA_KERNEL(
     tril_triu,
     ops::TrilTriuOpKernel<paddle::platform::CUDADeviceContext, float>,
     ops::TrilTriuOpKernel<paddle::platform::CUDADeviceContext, double>,
     ops::TrilTriuOpKernel<paddle::platform::CUDADeviceContext, int>,
-    ops::TrilTriuOpKernel<paddle::platform::CUDADeviceContext, int64_t>);
+    ops::TrilTriuOpKernel<paddle::platform::CUDADeviceContext, int64_t>,
+    ops::TrilTriuOpKernel<paddle::platform::CUDADeviceContext, plat::float16>);
 REGISTER_OP_CUDA_KERNEL(
     tril_triu_grad,
     ops::TrilTriuGradOpKernel<paddle::platform::CUDADeviceContext, float>,
     ops::TrilTriuGradOpKernel<paddle::platform::CUDADeviceContext, double>,
     ops::TrilTriuGradOpKernel<paddle::platform::CUDADeviceContext, int>,
-    ops::TrilTriuGradOpKernel<paddle::platform::CUDADeviceContext, int64_t>);
+    ops::TrilTriuGradOpKernel<paddle::platform::CUDADeviceContext, int64_t>,
+    ops::TrilTriuGradOpKernel<paddle::platform::CUDADeviceContext,
+                              plat::float16>);

paddle/fluid/operators/tril_triu_op.h

@@ -15,6 +15,7 @@ limitations under the License. */
 #pragma once
 
 #include "paddle/fluid/framework/op_registry.h"
+#include "paddle/fluid/platform/float16.h"
 #include "paddle/fluid/platform/for_range.h"
 
 namespace paddle {

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

@@ -16,8 +16,10 @@
 import unittest
 import numpy as np
 from op_test import OpTest
+import paddle
 import paddle.fluid as fluid
 import paddle.tensor as tensor
+from paddle.fluid.framework import Program, program_guard
 
 
 class TrilTriuOpDefaultTest(OpTest):
@@ -68,13 +70,17 @@ def case_generator(op_type, Xshape, diagonal, expected):
 
     class FailureCase(unittest.TestCase):
         def test_failure(self):
+            paddle.enable_static()
+
             data = fluid.data(shape=Xshape, dtype='float64', name=cls_name)
             with self.assertRaisesRegexp(
                     eval(expected.split(':')[-1]), errmsg[expected]):
                 getattr(tensor, op_type)(x=data, diagonal=diagonal)
 
     class SuccessCase(TrilTriuOpDefaultTest):
         def initTestCase(self):
+            paddle.enable_static()
+
             self.real_op_type = op_type
             self.diagonal = diagonal
             self.X = np.random.random(Xshape).astype("float64")
@@ -120,39 +126,58 @@ class TestTrilTriuOpAPI(unittest.TestCase):
     """
 
     def test_api(self):
-        data = np.random.random([1, 9, 9, 4]).astype('float32')
-        x = fluid.data(shape=[1, 9, -1, 4], dtype='float32', name='x')
-        tril_out, triu_out = tensor.tril(x), tensor.triu(x)
-
-        place = fluid.CUDAPlace(0) if fluid.core.is_compiled_with_cuda(
-        ) else fluid.CPUPlace()
-        exe = fluid.Executor(place)
-        tril_out, triu_out = exe.run(
-            fluid.default_main_program(),
-            feed={"x": data},
-            fetch_list=[tril_out, triu_out], )
-        self.assertTrue(np.allclose(tril_out, np.tril(data)))
-        self.assertTrue(np.allclose(triu_out, np.triu(data)))
+        paddle.enable_static()
+
+        dtypes = ['float16', 'float32']
+        for dtype in dtypes:
+            prog = Program()
+            startup_prog = Program()
+            with program_guard(prog, startup_prog):
+                data = np.random.random([1, 9, 9, 4]).astype(dtype)
+                x = fluid.data(shape=[1, 9, -1, 4], dtype=dtype, name='x')
+                tril_out, triu_out = tensor.tril(x), tensor.triu(x)
+
+                place = fluid.CUDAPlace(0) if fluid.core.is_compiled_with_cuda(
+                ) else fluid.CPUPlace()
+                exe = fluid.Executor(place)
+                tril_out, triu_out = exe.run(
+                    fluid.default_main_program(),
+                    feed={"x": data},
+                    fetch_list=[tril_out, triu_out], )
+                self.assertTrue(np.allclose(tril_out, np.tril(data)))
+                self.assertTrue(np.allclose(triu_out, np.triu(data)))
 
     def test_api_with_dygraph(self):
-        with fluid.dygraph.guard():
-            data = np.random.random([1, 9, 9, 4]).astype('float32')
-            x = fluid.dygraph.to_variable(data)
-            tril_out, triu_out = tensor.tril(x).numpy(), tensor.triu(x).numpy()
-            self.assertTrue(np.allclose(tril_out, np.tril(data)))
-            self.assertTrue(np.allclose(triu_out, np.triu(data)))
+        paddle.disable_static()
+
+        dtypes = ['float16', 'float32']
+        for dtype in dtypes:
+            with fluid.dygraph.guard():
+                data = np.random.random([1, 9, 9, 4]).astype(dtype)
+                x = fluid.dygraph.to_variable(data)
+                tril_out, triu_out = tensor.tril(x).numpy(), tensor.triu(
+                    x).numpy()
+                self.assertTrue(np.allclose(tril_out, np.tril(data)))
+                self.assertTrue(np.allclose(triu_out, np.triu(data)))
 
     def test_fluid_api(self):
-        data = np.random.random([1, 9, 9, 4]).astype('float32')
-        x = fluid.data(shape=[1, 9, -1, 4], dtype='float32', name='x')
-        triu_out = fluid.layers.triu(x)
-
-        place = fluid.CUDAPlace(0) if fluid.core.is_compiled_with_cuda(
-        ) else fluid.CPUPlace()
-        exe = fluid.Executor(place)
-        triu_out = exe.run(fluid.default_main_program(),
-                           feed={"x": data},
-                           fetch_list=[triu_out])
+        paddle.enable_static()
+
+        dtypes = ['float16', 'float32']
+        for dtype in dtypes:
+            prog = Program()
+            startup_prog = Program()
+            with program_guard(prog, startup_prog):
+                data = np.random.random([1, 9, 9, 4]).astype(dtype)
+                x = fluid.data(shape=[1, 9, -1, 4], dtype=dtype, name='x')
+                triu_out = fluid.layers.triu(x)
+
+                place = fluid.CUDAPlace(0) if fluid.core.is_compiled_with_cuda(
+                ) else fluid.CPUPlace()
+                exe = fluid.Executor(place)
+                triu_out = exe.run(fluid.default_main_program(),
+                                   feed={"x": data},
+                                   fetch_list=[triu_out])
 
 
 if __name__ == '__main__':

python/paddle/tensor/creation.py

@@ -558,8 +558,8 @@ def _tril_triu_op(helper):
     x = helper.kwargs.get('x', None)
 
     assert x is not None, 'x cannot be None in {}'.format(op_type)
-    check_variable_and_dtype(x, 'x', ['float32', 'float64', 'int32', 'int64'],
-                             op_type)
+    check_variable_and_dtype(
+        x, 'x', ['float16', 'float32', 'float64', 'int32', 'int64'], op_type)
     if len(x.shape) < 2:
         raise ValueError("x shape in {} must be at least 2-D".format(op_type))
     diagonal = helper.kwargs.get('diagonal', 0)