From 192b3033e9ccc0d4cad918f6c64f04246f647608 Mon Sep 17 00:00:00 2001
From: Weilong Wu <veyron_wu@163.com>
Date: Tue, 6 Sep 2022 14:08:45 +0800
Subject: [PATCH] [Eager, Performance optimization] reduce_all interface move
 reduce_all flag from python to C++ (#45744)

* [Eager, Performance optimization] move reduce_all flag from python to c++

* polish reduce_all

* fix ci error

* fix errors
---
 paddle/phi/kernels/reduce_all_kernel.cc | 3 +++
 python/paddle/fluid/layers/nn.py        | 4 ++++
 2 files changed, 7 insertions(+)

diff --git a/paddle/phi/kernels/reduce_all_kernel.cc b/paddle/phi/kernels/reduce_all_kernel.cc
index 9b4515ee29..5b8d2cbecc 100644
--- a/paddle/phi/kernels/reduce_all_kernel.cc
+++ b/paddle/phi/kernels/reduce_all_kernel.cc
@@ -26,6 +26,9 @@ void AllKernel(const Context& dev_ctx,
                bool keep_dim,
                DenseTensor* out) {
   bool reduce_all = false;
+  if (dims.size() == 0 || static_cast<int>(dims.size()) == x.dims().size()) {
+    reduce_all = true;
+  }
   AllRawKernel<T>(dev_ctx, x, dims, keep_dim, reduce_all, out);
 }
 
diff --git a/python/paddle/fluid/layers/nn.py b/python/paddle/fluid/layers/nn.py
index 53994eed80..b5615ee1bb 100755
--- a/python/paddle/fluid/layers/nn.py
+++ b/python/paddle/fluid/layers/nn.py
@@ -5032,6 +5032,10 @@ def reduce_all(input, dim=None, keep_dim=False, name=None):
     """
     if dim is not None and not isinstance(dim, list):
         dim = [dim]
+
+    if in_dygraph_mode():
+        return _C_ops.all(input, dim if dim != None else [], keep_dim)
+
     check_variable_and_dtype(input, 'input', ('bool'), 'reduce_all')
     helper = LayerHelper('reduce_all', **locals())
     out = helper.create_variable_for_type_inference(dtype=helper.input_dtype())
-- 
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