diff --git a/test/src/cpp11/cpp11_test.cpp b/test/src/cpp11/cpp11_test.cpp
index 55e7f10..9e636c3 100644
--- a/test/src/cpp11/cpp11_test.cpp
+++ b/test/src/cpp11/cpp11_test.cpp
@@ -4,9 +4,14 @@ using namespace std;
 #include "thread_usage.h"
 #include "threadpool.h"
 
+extern "C"{
+#include <time.h>
+}
+
 int main(){
     std::cout<<"test start"<<endl;
     try{
+        std::cout<<"cpu count is "<<CoreCount()<<std::endl;
         TestThreadPool();
     }catch( std::exception  e){
         std::cout<<"exception"<<e.what();
diff --git a/test/src/cpp11/thread_usage.cpp b/test/src/cpp11/thread_usage.cpp
index b72efbe..19bd414 100644
--- a/test/src/cpp11/thread_usage.cpp
+++ b/test/src/cpp11/thread_usage.cpp
@@ -142,21 +142,29 @@ int TestRValue()
     std::cout << "The contents of the vector are \"" << v[0];
 }
 
+int global = 0;
 class TestTask : public general::Task
 {
 public:
     void Run()
     {
-        std::cout<<"testwefwefwfwe"<<std::endl;
+        std::cout<<"test"<<std::endl;
     }
 };
-
+// 42973.6
+// 42942.3
 int TestThreadPool()
 {
+    //run code
     TestTask *t = new TestTask;
-    general::ThreadPool pool(10);
+    general::ThreadPool pool(12);
     pool.Start();
-    pool.AddTask(t);
-    // pool.Stop();
+    auto t1 = std::chrono::steady_clock::now();
+    for(int i = 0;i < 200000;i++)
+        pool.AddTask(t);
+    pool.StopAll();
+    auto t2 = std::chrono::steady_clock::now();
+    double dr_ms=std::chrono::duration<double,std::milli>(t2-t1).count();
+    std::cout<<"count is "<<dr_ms<<std::endl;
     getchar();
 }
\ No newline at end of file
diff --git a/test/src/cpp11/threadpool.cpp b/test/src/cpp11/threadpool.cpp
index 043e893..a05302d 100644
--- a/test/src/cpp11/threadpool.cpp
+++ b/test/src/cpp11/threadpool.cpp
@@ -1,5 +1,19 @@
 #include "threadpool.h"
 // 参考于https://www.cnblogs.com/bigosprite/p/11071462.html
+
+unsigned int CoreCount()
+{
+    unsigned count = 1; // 至少一个
+    #if defined (LINUX)
+    count = sysconf(_SC_NPROCESSORS_CONF);
+    #elif defined (WINDOWS)
+    SYSTEM_INFO si;
+    GetSystemInfo(&si);
+    count = si.dwNumberOfProcessors;
+    #endif
+    return count;
+}
+
 namespace general{
 
     CThreadPool::CThreadPool(int num)
@@ -9,15 +23,23 @@ namespace general{
         if (num < 2){
             mThreadCnt = 2;
         }
+        mStoping = false;
     }
 
     int CThreadPool::AddTask(Task *t){
         if ( nullptr == t){
             return -1;
         }
-        std::unique_lock<std::mutex> lck(this->mMutex);
-        this->mTasks.push(t);
-        mCd.notify_one();
+        if(!mStoping){
+            {
+                std::unique_lock<std::mutex> lck(this->mMutex);
+                this->mTasks.push(t);
+            }
+            mQueueAvaliableCondition.notify_one();
+            return 0;
+        }else{
+            return -2;
+        }
     }
 
     void CThreadPool::Start(){
@@ -33,9 +55,12 @@ namespace general{
         std::unique_lock<std::mutex> lk(this->mMutex);
         while (mTasks.empty() && mStarted)
         {
-            mCd.wait(lk);
+            mQueueAvaliableCondition.wait(lk);
+        }
+        
+        if(!mStarted){
+            return nullptr;
         }
-
         Task *ret = this->mTasks.front();
         this->mTasks.pop();
         return ret;
@@ -43,11 +68,10 @@ namespace general{
 
     void CThreadPool::Process(int id)
     {
-        std::cout << "thread id " << id << " started " << std::endl;
+        // std::cout << "thread id " << id << " started " << std::endl;
         while (mStarted)
         {
             Task *task = PopTask();
-            std::cout<<"wake up "<<std::endl;
             if (nullptr == task)
             {
                 continue;
@@ -64,7 +88,7 @@ namespace general{
         {
             std::lock_guard<std::mutex> lk(mMutex);
             mStarted = false;
-            mCd.notify_all();
+            mQueueAvaliableCondition.notify_all();
         }
 
         for (auto &th : mThreads)
@@ -73,19 +97,34 @@ namespace general{
         }
         mStarted = false;
     }
+    void CThreadPool::StopAll()
+    {
+        {
+            while(this->mTasks.size() > 0) ;
+            std::lock_guard<std::mutex> lk(mMutex);
+            mStarted = false;
+            mQueueAvaliableCondition.notify_all();
+        }
 
+        for (auto &th : mThreads)
+        {
+            th->join();
+        }
+        mStarted = false;
+    }
     bool CThreadPool::Started(){
         return this->mStarted;
     }
 
         CThreadPool::~CThreadPool(){
-            std::cout << "desruction" << std::endl;
             if (this->mStarted)
             {
+                std::cout << "desruction" << std::endl;
+                this->mStarted = false;
                 {
                     std::lock_guard<std::mutex> lk(mMutex);
                     mStarted = false;
-                    mCd.notify_all();
+                    mQueueAvaliableCondition.notify_all();
                 }
 
                 for (size_t i = 0; i != this->mThreads.size(); ++i)
diff --git a/test/src/cpp11/threadpool.h b/test/src/cpp11/threadpool.h
index d155d85..cd97f39 100644
--- a/test/src/cpp11/threadpool.h
+++ b/test/src/cpp11/threadpool.h
@@ -10,6 +10,16 @@
 #include <utility>
 #include "threadpool.h"
 
+extern "C"{
+    #if !defined (_WIN32) && !defined (_WIN64)
+    #define LINUX
+    #include <sysconf.h>
+    #else
+    #define WINDOWS
+    #include <windows.h>
+    #endif
+    unsigned int CoreCount();
+}
 namespace general{
     class CThreadPool;
     enum  PRIORITY
@@ -58,16 +68,18 @@ namespace general{
         void Start();
         void Stop();
         bool Started();
+        void StopAll();
 
     private:
         CThreadPool();
         void Process(int id);
         uint32_t mThreadCnt;
         bool mStarted;
+        bool mStoping;
         Task *PopTask();
         std::vector<std::thread*> mThreads;
         std::queue<Task *> mTasks;
         std::mutex mMutex;
-        std::condition_variable mCd;
+        std::condition_variable mQueueAvaliableCondition;
     }ThreadPool;
 }
\ No newline at end of file