From f3e983e49987b32af57e2e7924be8b245041ec4d Mon Sep 17 00:00:00 2001
From: Yu Yang <yuyang18@baidu.com>
Date: Mon, 19 Mar 2018 17:08:19 +0800
Subject: [PATCH] Memory order

---
 paddle/fluid/framework/parallel_executor.cc | 8 +++-----
 1 file changed, 3 insertions(+), 5 deletions(-)

diff --git a/paddle/fluid/framework/parallel_executor.cc b/paddle/fluid/framework/parallel_executor.cc
index 2898c5ffd97..875b5d8ba7a 100644
--- a/paddle/fluid/framework/parallel_executor.cc
+++ b/paddle/fluid/framework/parallel_executor.cc
@@ -702,7 +702,7 @@ void ParallelExecutor::Run(const std::vector<std::string> &fetch_tensors,
   while (!pending_ops.empty()) {
     VarHandleBase *ready_var = nullptr;
     for (auto &pair : pending_vars) {
-      if (pair.second) {
+      if (pair.second.load(std::memory_order_acquire)) {
         ready_var = pair.first;
       }
     }
@@ -714,7 +714,6 @@ void ParallelExecutor::Run(const std::vector<std::string> &fetch_tensors,
         throw * member_->exception_;
       }
 
-      std::this_thread::yield();
       continue;
     }
 
@@ -753,7 +752,7 @@ void ParallelExecutor::RunOp(
       VLOG(10) << op->DebugString();
       op->Run();
       for (auto *ready : ready_buffer) {
-        *ready = true;
+        ready->store(true, std::memory_order_release);
       }
     } catch (platform::EnforceNotMet ex) {
       member_->exception_.reset(new platform::EnforceNotMet(ex));
@@ -762,8 +761,7 @@ void ParallelExecutor::RunOp(
     }
   };
 
-  op_run();
-  //  member_->pool_.enqueue(op_run);
+  member_->pool_.enqueue(op_run);
 }
 }  // namespace framework
 }  // namespace paddle
-- 
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