diff --git a/cpp/CHANGELOG.md b/cpp/CHANGELOG.md
index e0f3b1de253775628566084332afba804c1aa1ad..87dfa83427f77ab130711256b7cc90d5c734c72e 100644
--- a/cpp/CHANGELOG.md
+++ b/cpp/CHANGELOG.md
@@ -32,6 +32,7 @@ Please mark all change in change log and use the ticket from JIRA.
 - MS-378 - Debug and Update normal_test in scheduler unittest
 - MS-379 - Add Dump implementation in Resource
 - MS-380 - Update resource loader and executor, work util all finished
+- MS-383 - Modify condition variable usage in scheduler
 
 ## New Feature
 - MS-343 - Implement ResourceMgr
diff --git a/cpp/src/scheduler/ResourceMgr.cpp b/cpp/src/scheduler/ResourceMgr.cpp
index 916aaa238a0debf8636a637ac4aaf2c953f1aa81..1c8e7607c36b148bc5d7d52884250b5f640a5904 100644
--- a/cpp/src/scheduler/ResourceMgr.cpp
+++ b/cpp/src/scheduler/ResourceMgr.cpp
@@ -76,7 +76,7 @@ ResourceMgr::Stop() {
 
 void
 ResourceMgr::PostEvent(const EventPtr &event) {
-    std::unique_lock<std::mutex> lock(event_mutex_);
+    std::lock_guard<std::mutex> lock(event_mutex_);
     queue_.emplace(event);
     event_cv_.notify_one();
 }
@@ -100,13 +100,14 @@ ResourceMgr::event_process() {
         event_cv_.wait(lock, [this] { return !queue_.empty(); });
 
         auto event = queue_.front();
+        queue_.pop();
+        lock.unlock();
         if (event == nullptr) {
             break;
         }
 
 //        ENGINE_LOG_DEBUG << "ResourceMgr process " << *event;
 
-        queue_.pop();
         if (subscriber_) {
             subscriber_(event);
         }
diff --git a/cpp/src/scheduler/Scheduler.cpp b/cpp/src/scheduler/Scheduler.cpp
index 191d1957aa3a591cd21766a160bd3f60f1f53ea8..6eef6014fb4ca2f4a6b02a2abda75b2b0b3f82e2 100644
--- a/cpp/src/scheduler/Scheduler.cpp
+++ b/cpp/src/scheduler/Scheduler.cpp
@@ -41,10 +41,11 @@ Scheduler::Stop() {
 
 void
 Scheduler::PostEvent(const EventPtr &event) {
-    std::lock_guard<std::mutex> lock(event_mutex_);
-    event_queue_.push(event);
+    {
+        std::lock_guard<std::mutex> lock(event_mutex_);
+        event_queue_.push(event);
+    }
     event_cv_.notify_one();
-//    SERVER_LOG_DEBUG << "Scheduler post " << *event;
 }
 
 std::string
@@ -58,12 +59,11 @@ Scheduler::worker_function() {
         std::unique_lock<std::mutex> lock(event_mutex_);
         event_cv_.wait(lock, [this] { return !event_queue_.empty(); });
         auto event = event_queue_.front();
+        event_queue_.pop();
         if (event == nullptr) {
             break;
         }
 
-//        SERVER_LOG_DEBUG << "Scheduler process " << *event;
-        event_queue_.pop();
         Process(event);
     }
 }
@@ -105,16 +105,14 @@ Scheduler::OnStartUp(const EventPtr &event) {
 void
 Scheduler::OnFinishTask(const EventPtr &event) {
     if (auto resource = event->resource_.lock()) {
-        resource->WakeupExecutor();
     }
 }
 
 void
 Scheduler::OnCopyCompleted(const EventPtr &event) {
     if (auto resource = event->resource_.lock()) {
-        resource->WakeupLoader();
         resource->WakeupExecutor();
-        if (resource->Type()== ResourceType::DISK) {
+        if (resource->Type() == ResourceType::DISK) {
             Action::PushTaskToNeighbour(event->resource_);
         }
     }
diff --git a/cpp/src/scheduler/action/PushTaskToNeighbour.cpp b/cpp/src/scheduler/action/PushTaskToNeighbour.cpp
index a9b43b3f057f88646f4e7f1ce300bc00acccddbe..3c01fc492840fd72ba34ce9959dadcda3985c7cd 100644
--- a/cpp/src/scheduler/action/PushTaskToNeighbour.cpp
+++ b/cpp/src/scheduler/action/PushTaskToNeighbour.cpp
@@ -4,6 +4,7 @@
  * Proprietary and confidential.
  ******************************************************************************/
 
+#include <iostream>
 #include "Action.h"
 
 
@@ -16,7 +17,7 @@ push_task(const ResourcePtr &self, const ResourcePtr &other) {
     auto &self_task_table = self->task_table();
     auto &other_task_table = other->task_table();
     CacheMgr cache;
-    auto indexes = PickToMove(self_task_table, cache, 1);
+    auto indexes = PickToMove(self_task_table, cache, 10);
     for (auto index : indexes) {
         if (self_task_table.Move(index)) {
             auto task = self_task_table.Get(index)->task;
diff --git a/cpp/src/scheduler/resource/Resource.cpp b/cpp/src/scheduler/resource/Resource.cpp
index 2c46a703c6f92e06b6f949721500c456a3e06cf3..0bb886fdf04cf5cd2b12fcb81452c33d5fc04779 100644
--- a/cpp/src/scheduler/resource/Resource.cpp
+++ b/cpp/src/scheduler/resource/Resource.cpp
@@ -3,6 +3,7 @@
  * Unauthorized copying of this file, via any medium is strictly prohibited.
  * Proprietary and confidential.
  ******************************************************************************/
+#include <iostream>
 #include "Resource.h"
 
 
@@ -61,19 +62,23 @@ TaskTable &Resource::task_table() {
 }
 
 void Resource::WakeupLoader() {
-    std::lock_guard<std::mutex> lock(load_mutex_);
-    load_flag_ = true;
+    {
+        std::lock_guard<std::mutex> lock(load_mutex_);
+        load_flag_ = true;
+    }
     load_cv_.notify_one();
 }
 
 void Resource::WakeupExecutor() {
-    std::lock_guard<std::mutex> lock(exec_mutex_);
-    exec_flag_ = true;
+    {
+        std::lock_guard<std::mutex> lock(exec_mutex_);
+        exec_flag_ = true;
+    }
     exec_cv_.notify_one();
 }
 
 TaskTableItemPtr Resource::pick_task_load() {
-    auto indexes = PickToLoad(task_table_, 3);
+    auto indexes = PickToLoad(task_table_, 10);
     for (auto index : indexes) {
         // try to set one task loading, then return
         if (task_table_.Load(index))
@@ -99,6 +104,7 @@ void Resource::loader_function() {
         std::unique_lock<std::mutex> lock(load_mutex_);
         load_cv_.wait(lock, [&] { return load_flag_; });
         load_flag_ = false;
+        lock.unlock();
         while (true) {
             auto task_item = pick_task_load();
             if (task_item == nullptr) {
@@ -125,6 +131,7 @@ void Resource::executor_function() {
         std::unique_lock<std::mutex> lock(exec_mutex_);
         exec_cv_.wait(lock, [&] { return exec_flag_; });
         exec_flag_ = false;
+        lock.unlock();
         while (true) {
             auto task_item = pick_task_execute();
             if (task_item == nullptr) {
diff --git a/cpp/unittest/scheduler/normal_test.cpp b/cpp/unittest/scheduler/normal_test.cpp
index 4d1fa36de8474bb9ab1a669545cb9908530c2725..d9e4ad218c11c216eb18b1bef9af96d62c9f4f6a 100644
--- a/cpp/unittest/scheduler/normal_test.cpp
+++ b/cpp/unittest/scheduler/normal_test.cpp
@@ -27,59 +27,60 @@ TEST(normal_test, test1) {
     auto scheduler = new Scheduler(res_mgr);
     scheduler->Start();
 
-    auto task1 = std::make_shared<TestTask>();
-    auto task2 = std::make_shared<TestTask>();
-    auto task3 = std::make_shared<TestTask>();
-    auto task4 = std::make_shared<TestTask>();
-    if (auto observe = disk.lock()) {
-        observe->task_table().Put(task1);
-        observe->task_table().Put(task2);
-        observe->task_table().Put(task3);
-        observe->task_table().Put(task4);
+    const uint64_t NUM_TASK = 10;
+    std::vector<std::shared_ptr<TestTask>> tasks;
+    for (uint64_t i = 0; i < NUM_TASK; ++i) {
+        if (auto observe = disk.lock()) {
+            auto task = std::make_shared<TestTask>();
+            tasks.push_back(task);
+            observe->task_table().Put(task);
+        }
     }
 
-//    if (auto disk_r = disk.lock()) {
-//        if (auto cpu_r = cpu.lock()) {
-//            if (auto gpu1_r = gpu1.lock()) {
-//                if (auto gpu2_r = gpu2.lock()) {
-//                    std::cout << "<<<<<<<<<<before<<<<<<<<<<" << std::endl;
-//                    std::cout << "disk:" << std::endl;
-//                    std::cout << disk_r->task_table().Dump() << std::endl;
-//                    std::cout << "cpu:" << std::endl;
-//                    std::cout << cpu_r->task_table().Dump() << std::endl;
-//                    std::cout << "gpu1:" << std::endl;
-//                    std::cout << gpu1_r->task_table().Dump() << std::endl;
-//                    std::cout << "gpu2:" << std::endl;
-//                    std::cout << gpu2_r->task_table().Dump() << std::endl;
-//                    std::cout << ">>>>>>>>>>before>>>>>>>>>>" << std::endl;
-//                }
-//            }
-//        }
-//    }
+    if (auto disk_r = disk.lock()) {
+        if (auto cpu_r = cpu.lock()) {
+            if (auto gpu1_r = gpu1.lock()) {
+                if (auto gpu2_r = gpu2.lock()) {
+                    std::cout << "<<<<<<<<<<before<<<<<<<<<<" << std::endl;
+                    std::cout << "disk:" << std::endl;
+                    std::cout << disk_r->task_table().Dump() << std::endl;
+                    std::cout << "cpu:" << std::endl;
+                    std::cout << cpu_r->task_table().Dump() << std::endl;
+                    std::cout << "gpu1:" << std::endl;
+                    std::cout << gpu1_r->task_table().Dump() << std::endl;
+                    std::cout << "gpu2:" << std::endl;
+                    std::cout << gpu2_r->task_table().Dump() << std::endl;
+                    std::cout << ">>>>>>>>>>before>>>>>>>>>>" << std::endl;
+                }
+            }
+        }
+    }
 
-    sleep(5);
+    sleep(1);
 
-//    if (auto disk_r = disk.lock()) {
-//        if (auto cpu_r = cpu.lock()) {
-//            if (auto gpu1_r = gpu1.lock()) {
-//                if (auto gpu2_r = gpu2.lock()) {
-//                    std::cout << "<<<<<<<<<<after<<<<<<<<<<" << std::endl;
-//                    std::cout << "disk:" << std::endl;
-//                    std::cout << disk_r->task_table().Dump() << std::endl;
-//                    std::cout << "cpu:" << std::endl;
-//                    std::cout << cpu_r->task_table().Dump() << std::endl;
-//                    std::cout << "gpu1:" << std::endl;
-//                    std::cout << gpu1_r->task_table().Dump() << std::endl;
-//                    std::cout << "gpu2:" << std::endl;
-//                    std::cout << gpu2_r->task_table().Dump() << std::endl;
-//                    std::cout << ">>>>>>>>>>after>>>>>>>>>>" << std::endl;
-//                }
-//            }
-//        }
-//    }
+    if (auto disk_r = disk.lock()) {
+        if (auto cpu_r = cpu.lock()) {
+            if (auto gpu1_r = gpu1.lock()) {
+                if (auto gpu2_r = gpu2.lock()) {
+                    std::cout << "<<<<<<<<<<after<<<<<<<<<<" << std::endl;
+                    std::cout << "disk:" << std::endl;
+                    std::cout << disk_r->task_table().Dump() << std::endl;
+                    std::cout << "cpu:" << std::endl;
+                    std::cout << cpu_r->task_table().Dump() << std::endl;
+                    std::cout << "gpu1:" << std::endl;
+                    std::cout << gpu1_r->task_table().Dump() << std::endl;
+                    std::cout << "gpu2:" << std::endl;
+                    std::cout << gpu2_r->task_table().Dump() << std::endl;
+                    std::cout << ">>>>>>>>>>after>>>>>>>>>>" << std::endl;
+                }
+            }
+        }
+    }
     scheduler->Stop();
     res_mgr->Stop();
 
-    ASSERT_EQ(task1->load_count_, 1);
-    ASSERT_EQ(task1->exec_count_, 1);
+    for (uint64_t i = 0 ; i < NUM_TASK; ++i) {
+        ASSERT_EQ(tasks[i]->load_count_, 1);
+        ASSERT_EQ(tasks[i]->exec_count_, 1);
+    }
 }