add pattern AdjustAllReduceMulAdd

mindspore/ccsrc/operator/ops.cc

@@ -226,6 +226,7 @@ const PrimitivePtr kPrimIsNot = std::make_shared<Primitive>("is_not");
 const PrimitivePtr kPrimMirror = std::make_shared<Primitive>("_MirrorOperator");
 const PrimitivePtr kPrimVirtualDiv = std::make_shared<Primitive>("_VirtualDiv");
 const PrimitivePtr kPrimVirtualDataset = std::make_shared<Primitive>("_VirtualDataset");
+const PrimitivePtr kPrimAllReduce = std::make_shared<Primitive>("AllReduce");
 
 // Debug ops
 const PrimitivePtr kPrimScalarSummary = std::make_shared<Primitive>("ScalarSummary");

mindspore/ccsrc/operator/ops.h

@@ -231,6 +231,7 @@ extern const PrimitivePtr kPrimMinimumGrad;
 extern const PrimitivePtr kPrimMaximumGrad;
 
 // Comm ops
+extern const PrimitivePtr kPrimAllReduce;
 extern const PrimitivePtr kPrimMirror;
 extern const PrimitivePtr kPrimVirtualDiv;
 extern const PrimitivePtr kPrimVirtualDataset;

mindspore/ccsrc/optimizer/irpass.cc

@@ -48,7 +48,7 @@ namespace irpass {
 OptimizeIRPassLib::OptimizeIRPassLib() {
   arithmetic_simplify_ = MakeSubstitution(ArithmeticSimplify(), "arithmetic_simplify",
                                           {prim::kPrimScalarAdd, prim::kPrimScalarMul, prim::kPrimTensorAdd,
-                                           prim::kPrimIdentity, prim::kPrimMomentum, prim::kPrimMul});
+                                           prim::kPrimAddN, prim::kPrimIdentity, prim::kPrimMomentum, prim::kPrimMul});
   special_op_eliminate_ = MakeSubstitution(SpecialOpEliminater(), "special_op_eliminate",
                                            {prim::kPrimInsertGradientOf, prim::kPrimPrintShapeType,
                                             prim::kPrimGetRefKey, prim::kPrimMirror, prim::kPrimVirtualDiv});

mindspore/ccsrc/optimizer/irpass/arithmetic_simplify.h

@@ -228,6 +228,82 @@ class ConstantDuplicateMul : public AnfVisitor {
   CNodePtr cnode_;
 };
 
+// grad = AllReduce(grad) / worker_number
+// grad = grad + weight * decy
+// ->
+// grad = grad + weight * decy
+// grad = AllReduce(grad) / worker_number
+
+// {prim::kPrimAddN, {prim::kPrimMakeTuple, {prim::kPrimMul, {prim::kPrimAllReduce, X}, Y}, Z}} ->
+// {prim::kPrimMul, {prim::kPrimAllReduce, {prim::kPrimAddN,{prim::kPrimMakeTuple, Z, X}}}, Y}
+class AdjustAllReduceMulAdd : public AnfVisitor {
+ public:
+  AnfNodePtr operator()(const OptimizerPtr &, const AnfNodePtr &node) override {
+    Reset();
+    // {prim::kPrimAddN, Zs}
+    if (!IsPrimitiveCNode(node, prim::kPrimAddN)) {
+      return nullptr;
+    }
+    auto addn = node->cast<CNodePtr>();
+    if (addn->size() != 2) {
+      return nullptr;
+    }
+
+    AnfVisitor::Match(prim::kPrimMakeTuple, {IsNode, IsNode})(addn->input(1));
+    if (x_ == nullptr || y_ == nullptr || z_ == nullptr) {
+      return nullptr;
+    }
+
+    auto fg = node->func_graph();
+    AnfNodePtr tuple = NewCNode({NewValueNode(prim::kPrimMakeTuple), z_, x_}, fg);
+    AnfNodePtr add = NewCNode({NewValueNode(prim::kPrimAddN), tuple}, fg);
+    AnfNodePtr all_reduce = NewCNode({NewValueNode(prim::kPrimAllReduce), add}, fg);
+    return NewCNode({NewValueNode(prim::kPrimMul), all_reduce, y_}, fg);
+  }
+
+  void Visit(const AnfNodePtr &node) override {
+    if (level_ == 0) {
+      level_ = 1;
+      is_reduce_match_ = false;
+      // {prim::kPrimMul, {prim::kPrimAllReduce, X}, Y}
+      AnfVisitor::Match(prim::kPrimMul)(node);
+      level_ = 0;
+      if (is_reduce_match_) {
+        y_ = tmp_;
+      } else {
+        z_ = node;
+      }
+    }
+
+    if (level_ == 1) {
+      // {prim::kPrimAllReduce, X}
+      if (IsPrimitiveCNode(node, prim::kPrimAllReduce)) {
+        auto cnode = node->cast<CNodePtr>();
+        if (cnode->size() > 1) {
+          x_ = cnode->input(1);
+          is_reduce_match_ = true;
+        }
+      } else {
+        tmp_ = node;
+      }
+    }
+  }
+
+  void Reset() {
+    level_ = 0;
+    is_reduce_match_ = false;
+    x_ = nullptr;
+    y_ = nullptr;
+    z_ = nullptr;
+    tmp_ = nullptr;
+  }
+
+ private:
+  int level_{0};
+  bool is_reduce_match_{false};
+  AnfNodePtr x_{nullptr}, y_{nullptr}, z_{nullptr}, tmp_{nullptr};
+};
+
 class ArithmeticSimplify {
  public:
   ArithmeticSimplify()
@@ -243,6 +319,7 @@ class ArithmeticSimplify {
     eliminaters_.emplace_back(identity_);
     eliminaters_.emplace_back(opt_update_zero_tensor_);
     eliminaters_.emplace_back(constant_duplicate_mul_);
+    eliminaters_.emplace_back(adjust_allreduce_mul_add_);
   }
   ~ArithmeticSimplify() = default;
 
@@ -264,6 +341,7 @@ class ArithmeticSimplify {
   PrimEliminater identity_;
   OptUpdateZeroTensor opt_update_zero_tensor_;
   ConstantDuplicateMul constant_duplicate_mul_;
+  AdjustAllReduceMulAdd adjust_allreduce_mul_add_;
   std::vector<TransformFuncType> eliminaters_{};
 };
 }  // namespace irpass

mindspore/ops/operations/array_ops.py

@@ -1235,7 +1235,7 @@ class UnsortedSegmentSum(PrimitiveWithInfer):
         Tensor, the shape is :math:`(z, x_{N+1}, ..., x_R)`.
 
     Examples:
-        >>> input_x = Tensor([1, 2, 3, 4], mindspore.float)
+        >>> input_x = Tensor([1, 2, 3, 4], mindspore.float32)
         >>> segment_ids = Tensor([0, 0, 1, 2], mindspore.int32)
         >>> num_segments = 4
         >>> P.UnsortedSegmentSum()(input_x, segment_ids, num_segments)

mindspore/ops/operations/nn_ops.py

@@ -1572,7 +1572,7 @@ class LayerNorm(Primitive):
     `Layer Normalization <https://arxiv.org/abs/1607.06450>`_.
 
     .. math::
-        y = \frac{x - mean]}{\sqrt{variance + \epsilon}} * \gamma + \beta
+        y = \frac{x - mean}{\sqrt{variance + \epsilon}} * \gamma + \beta
 
     where :math:`\gamma` is scale, :math:`\beta` is bias, :math:`\epsilon` is epsilon.
 

tests/ut/cpp/optimizer/lib_test.cc

@@ -556,5 +556,24 @@ TEST_F(TestOptLib, test_constant_duplicate_mul) {
   ASSERT_TRUE(CheckOpt(beforerl, after, patterns));
   ASSERT_TRUE(CheckOpt(beforerr, after, patterns));
 }
+
+TEST_F(TestOptLib, test_adjust_allreduce_mul_add) {
+  FuncGraphPtr beforell = getPyFun.CallAndParseRet("test_adjust_allreduce_mul_add", "beforell");
+  FuncGraphPtr beforelr = getPyFun.CallAndParseRet("test_adjust_allreduce_mul_add", "beforelr");
+  FuncGraphPtr beforerl = getPyFun.CallAndParseRet("test_adjust_allreduce_mul_add", "beforerl");
+  FuncGraphPtr beforerr = getPyFun.CallAndParseRet("test_adjust_allreduce_mul_add", "beforerr");
+  FuncGraphPtr after1 = getPyFun.CallAndParseRet("test_adjust_allreduce_mul_add", "after1");
+  FuncGraphPtr before2r = getPyFun.CallAndParseRet("test_adjust_allreduce_mul_add", "before2r");
+  FuncGraphPtr before2l = getPyFun.CallAndParseRet("test_adjust_allreduce_mul_add", "before2l");
+  FuncGraphPtr after2 = getPyFun.CallAndParseRet("test_adjust_allreduce_mul_add", "after2");
+  auto patterns = std::vector<SubstitutionPtr>({irpass.arithmetic_simplify_});
+  ASSERT_TRUE(CheckOpt(beforell, after1, patterns));
+  ASSERT_TRUE(CheckOpt(beforelr, after1, patterns));
+  ASSERT_TRUE(CheckOpt(beforerl, after1, patterns));
+  ASSERT_TRUE(CheckOpt(beforerr, after1, patterns));
+  ASSERT_TRUE(CheckOpt(before2l, after2, patterns));
+  ASSERT_TRUE(CheckOpt(before2r, after2, patterns));
+}
+
 }  // namespace opt
 }  // namespace mindspore

tests/ut/cpp/python_input/gtest_input/optimizer/opt_test.py

@@ -908,8 +908,8 @@ def test_print_tuple_wrapper(tag):
 
 def test_constant_duplicate_mul(tag):
     fns = FnDict()
-    Mul = Primitive('Mul');
-    Sqrt = Primitive('Sqrt');
+    Mul = Primitive('Mul')
+    Sqrt = Primitive('Sqrt')
 
     x = Tensor(np.array([[2, 2], [2, 3]]).astype('float32'))
     tensor1 = Tensor(np.array([[1.2, 2.1], [2.2, 3.2]]).astype('float32'))
@@ -936,3 +936,44 @@ def test_constant_duplicate_mul(tag):
         return Mul(Sqrt(x), Mul(tensor1, tensor2))
 
     return fns[tag]
+
+
+def test_adjust_allreduce_mul_add(tag):
+    fns = FnDict()
+    Mul = Primitive('Mul')
+    AddN = Primitive('AddN')
+    AllReduce = Primitive('AllReduce')
+
+    @fns
+    def beforell(x, y, z):
+        return AddN((z, Mul(y, AllReduce(x))))
+
+    @fns
+    def beforelr(x, y, z):
+        return AddN((z, Mul(AllReduce(x), y)))
+
+    @fns
+    def beforerl(x, y, z):
+        return AddN((Mul(y, AllReduce(x)), z))
+
+    @fns
+    def beforerr(x, y, z):
+        return AddN((Mul(AllReduce(x), y), z))
+
+    @fns
+    def after1(x, y, z):
+        return Mul(AllReduce(AddN((z, x))), y)
+
+    @fns
+    def before2r(x, y, z):
+        return AddN((Mul(AllReduce(x), y), Mul(z, z)))
+
+    @fns
+    def before2l(x, y, z):
+        return AddN((Mul(z, z), Mul(AllReduce(x), y)))
+
+    @fns
+    def after2(x, y, z):
+        return Mul(AllReduce(AddN((Mul(z, z), x))), y)
+
+    return fns[tag]