fix readme

Author: ffengc

README.md

@@ -1,9 +1,10 @@
-# Google-tcmalloc-simulation-implementation
+# Google-tcmalloc-simulation-implementation(未完成)
 谷歌开源项目tcmalloc高并发内存池学习和模拟实现
 
 开题日期：20240504
 
-- [Google-tcmalloc-simulation-implementation](#google-tcmalloc-simulation-implementation)
+- [Google-tcmalloc-simulation-implementation(未完成)](#google-tcmalloc-simulation-implementation未完成)
+  - [==bugs to fix (项目目前待解决的问题)==](#bugs-to-fix-项目目前待解决的问题)
   - [前言](#前言)
   - [threadCache整体框架](#threadcache整体框架)
   - [开始写threadCache代码](#开始写threadcache代码)
@@ -29,6 +30,16 @@
 
 ***
 
+## ==bugs to fix (项目目前待解决的问题)==
+
+1. 在ubuntu_arm64环境下，如果调用多线程，出现段错误（原因未知，待解决）
+2. 在ubuntu_arm64环境下，radix tree需要用第三棵，前两棵用不了，需要解决。
+3. 在window32位环境下，可以偶尔成功运行，出现偶发段错误，原因未知，待解决。
+
+经过radixtree优化后，模拟实现的tcmalloc效率高于malloc。(win32下测试，会出现偶发段错误)
+
+![](./assets/5.png)
+
 ## 前言
 
 当前项目是实现一个高并发的内存池，他的原型是google的一个开源项目tcmalloc，tcmalloc全称 Thread-Caching Malloc，即线程缓存的malloc，实现了高效的多线程内存管理，用于替代系统的内存分配相关的函数(malloc、free)。

assets/5.png

@@ -35,9 +35,9 @@ void BenchmarkMalloc(size_t ntimes, size_t nworks, size_t rounds) {
     for (auto& t : vthread) {
         t.join();
     }
-    std::cout << nworks << "个线程并发执行" << rounds << "次，每轮次malloc " << ntimes << "次: 花费：" << malloc_costtime.load() << "ms\n";
-    std::cout << nworks << "个线程并发执行" << rounds << "轮次，每轮次free " << ntimes << "次: 花费：" << free_costtime.load() << " ms\n";
-    std::cout << nworks << "个线程并发malloc&free " << nworks * rounds * ntimes << "次，总计花费：" << malloc_costtime.load() + free_costtime.load() << " ms\n";
+    std::cout << nworks << "threads run" << rounds << " times, each round malloc " << ntimes << " times, cost: " << malloc_costtime.load() << "ms\n";
+    std::cout << nworks << "threads run" << rounds << " times, each round free " << ntimes << " times,  cost: " << free_costtime.load() << " ms\n";
+    std::cout << nworks << "threads run malloc and free " << nworks * rounds * ntimes << " time, total cost: " << malloc_costtime.load() + free_costtime.load() << " ms\n";
 }
 
 // 单轮次申请释放次数 线程数 轮次
@@ -70,18 +70,16 @@ void BenchmarkConcurrentMalloc(size_t ntimes, size_t nworks, size_t rounds) {
     for (auto& t : vthread) {
         t.join();
     }
-    std::cout << nworks << "个线程并发执行" << rounds << "轮次，每轮次concurrent alloc " << ntimes << "次: 花费：" << malloc_costtime.load() << " ms\n";
-    std::cout << nworks << "个线程并发执行" << rounds << "轮次，每轮次concurrent dealloc " << ntimes << "次: 花费：" << free_costtime.load() << " ms\n";
-    std::cout << nworks << "个线程并发concurrent alloc&dealloc " << nworks * rounds * ntimes << "次，总计花费：" << malloc_costtime.load() + free_costtime.load() << " ms\n";
+    std::cout << nworks << "threads run" << rounds << " times, each round malloc " << ntimes << " times, cost: " << malloc_costtime.load() << "ms\n";
+    std::cout << nworks << "threads run" << rounds << " times, each round free " << ntimes << " times,  cost: " << free_costtime.load() << " ms\n";
+    std::cout << nworks << "threads run tcmalloc and tcfree " << nworks * rounds * ntimes << " time, total cost: " << malloc_costtime.load() + free_costtime.load() << " ms\n";
 }
 
 int main() {
     size_t n = 1000;
-    std::cout << "==========================================================" << std::endl;
     BenchmarkConcurrentMalloc(n, 4, 10);
-    // std::cout << std::endl
-    //           << std::endl;
-    // BenchmarkMalloc(n, 4, 10);
-    std::cout << "==========================================================" << std::endl;
+    std::cout << std::endl
+              << std::endl;
+    BenchmarkMalloc(n, 4, 10);
     return 0;
 }

bench_mark.cc

@@ -1,19 +1,19 @@
-# out: bench_mark.cc ./src/*.cc
-# 	g++ -o $@ $^ -std=c++11 -lpthread -m32
-# debug: bench_mark.cc ./src/*.cc
-# 	g++ -o $@ $^ -std=c++11 -lpthread -DPROJECT_DEBUG -g -m32
-# unit: unit_test.cc ./src/*.cc
-# 	g++ -o $@ $^ -std=c++11 -lpthread -DPROJECT_DEBUG -g -m32
-# .PHONY:clean
-# clean:
-# 	rm -f out debug
-
 out: bench_mark.cc ./src/*.cc
-	arm-linux-gnueabihf-g++ -o $@ $^ -std=c++11 -lpthread
+	g++ -o $@ $^ -std=c++11 -lpthread -m32
 debug: bench_mark.cc ./src/*.cc
-	arm-linux-gnueabihf-g++ -o $@ $^ -std=c++11 -lpthread -DPROJECT_DEBUG -g
+	g++ -o $@ $^ -std=c++11 -lpthread -DPROJECT_DEBUG -g -m32
 unit: unit_test.cc ./src/*.cc
-	arm-linux-gnueabihf-g++ -o $@ $^ -std=c++11 -lpthread -DPROJECT_DEBUG -g
+	g++ -o $@ $^ -std=c++11 -lpthread -DPROJECT_DEBUG -g -m32
 .PHONY:clean
 clean:
-	rm -f out debug unit
+	rm -f out debug
+
+# out: bench_mark.cc ./src/*.cc
+# 	arm-linux-gnueabihf-g++ -o $@ $^ -std=c++11 -lpthread
+# debug: bench_mark.cc ./src/*.cc
+# 	arm-linux-gnueabihf-g++ -o $@ $^ -std=c++11 -lpthread -DPROJECT_DEBUG -g
+# unit: unit_test.cc ./src/*.cc
+# 	arm-linux-gnueabihf-g++ -o $@ $^ -std=c++11 -lpthread -DPROJECT_DEBUG -g
+# .PHONY:clean
+# clean:
+# 	rm -f out debug unit