From bab11094aa0d62977513fabfcd55a9f262e7a062 Mon Sep 17 00:00:00 2001
From: Wilber <jiweibo@baidu.com>
Date: Tue, 20 Sep 2022 21:52:22 +0800
Subject: [PATCH] Revert "Optimiza params sync between CPU and GPU. (#45805)"
 (#46274)

This reverts commit a2b2af90593d0e45e7b122c81c6f426b39b066af.
---
 .../ir_params_sync_among_devices_pass.cc      | 25 -------------------
 1 file changed, 25 deletions(-)

diff --git a/paddle/fluid/inference/analysis/passes/ir_params_sync_among_devices_pass.cc b/paddle/fluid/inference/analysis/passes/ir_params_sync_among_devices_pass.cc
index 7f63eeaad2b..c450ada0839 100644
--- a/paddle/fluid/inference/analysis/passes/ir_params_sync_among_devices_pass.cc
+++ b/paddle/fluid/inference/analysis/passes/ir_params_sync_among_devices_pass.cc
@@ -21,12 +21,9 @@
 #include "paddle/fluid/framework/framework.pb.h"
 #include "paddle/fluid/framework/ir/graph_helper.h"
 #include "paddle/fluid/framework/lod_tensor.h"
-#include "paddle/fluid/framework/tensor.h"
 #include "paddle/fluid/framework/tensor_util.h"
-#include "paddle/fluid/inference/api/helper.h"
 #include "paddle/fluid/platform/bfloat16.h"
 #include "paddle/fluid/platform/enforce.h"
-#include "paddle/fluid/platform/place.h"
 #include "paddle/phi/common/data_type.h"
 
 namespace paddle {
@@ -117,28 +114,6 @@ void IrParamsSyncAmongDevicesPass::CopyParamsToGpu(Argument *argument) {
     reserve_cpu_weights = true;
   }
 
-  int64_t params_total_bytes{0};
-  for (auto *node : paddle::framework::ir::TopologySortOperations(graph)) {
-    if (!node->IsOp()) continue;
-    if (node->Op()->Type() == "feed" || node->Op()->Type() == "fetch") continue;
-    for (auto *var_node : node->inputs) {
-      if (!var_node->Var()->Persistable()) continue;
-      auto var_name = var_node->Var()->Name();
-      auto *var = scope->FindLocalVar(var_name);
-      if (var->IsType<framework::LoDTensor>() ||
-          var->IsType<framework::Tensor>()) {
-        auto *t = var->GetMutable<framework::LoDTensor>();
-        params_total_bytes += t->numel() * experimental::SizeOf(t->dtype());
-      }
-    }
-  }
-
-  {
-    // Alloc memory in pool to store all parameters.
-    framework::Tensor ts;
-    ts.mutable_data(place, params_total_bytes);
-  }
-
   std::unordered_set<std::string> visited;
   for (auto *node : paddle::framework::ir::TopologySortOperations(graph)) {
     if (!node->IsOp()) continue;
-- 
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