tcmalloc

I am running a binary linked with tcmalloc and it is not generating a stack trace for leaks it is detecting. The output says: The 1 largest leaks: Leak of 1401231 bytes in 82093 objects allocated from: If the preceding stack traces are not enough to find the leaks, try running THIS shell command: pprof ../../prog "/tmp/prog.15062.prog-end.heap" --inuse_objects --lines --heapcheck --edgefraction=1e-10 --nodefraction=1e-10 --gv When I run pprof I get a message that there are no nodes to print. I am enclosing code which has the suspected memory leak by HeapLeakChecker checker("prog"); .... assert

最近，用到了google-perftool分析程序的内存和CPU的使用情况，总结一下使用的一些方法和体会，分享给有需要的朋友。首先，说说google-perftool，它是由google开发的用来分析C/C++程序性能的一套工具，这里的性能分析主要包括内存和CPU两个方面，内存分析使用google-perftool所提供的tcmalloc，CPU分析使用它所提供的profiler。下面先分别介绍一下tcmalloc和profiler，然后再给出一些使用的例子，及一些使用时的注意事项。 1. tcmalloc tcmalloc的全称是thread cache malloc，顾名思义，它是带有thread cache的内存管理工具，具体的实现细节这里不做过多的介绍，感兴趣的朋友可以参考google官方提供的文档，或者阅读源码。这里需要注明一下tcmalloc的一些优点，和它所提供的一些分析程序内存使用的一些功能。 tcmalloc的主要优点有两个方面，一个是内存allocate/deallocate的速度，通常情况下它的速度比glibc所提供的malloc要快；另一个方面是小内存(< =32K)的管理，它的小内存是在thread cache里面管理的，一方面减少了加锁的开销，另一方面用来表示小内存所用的额外的空间也比较小，比较节省空间。因此，对于多线程下

Firstly, I want to know how to install TCmalloc in Ubuntu. Then I need a program uses TCmalloc . Then I need a small program to show that TCmalloc is working better than PTmalloc . I'll provide another answer since there's an easier way to install it than in the other answer: Ubuntu already has a package for google perf tools: http://packages.ubuntu.com/search?keywords=google-perftools By installing libgoogle-perftools-dev you should get all that is required for developing tcmalloc applications. As for how to actually use tcmalloc, see the other answer. To install TCMalloc : sudo apt-get

TCMalloc （ Thread-Caching Malloc ）是 google-perftools 工具中的一个，与标准的 glibc 库的 malloc 相 比， TCMalloc 在内存的分配上效率和速度要高得多，可以提高 Mysql 服 务器在高并发情况下的性能，降低系统负载。 Google-perftools 的项目： http://code.google.com/p/google-perftools/ TCMalloc 的原理介绍翻译： http://shiningray.cn/tcmalloc-thread-caching-malloc.html google-perftools 包括 TCMalloc 、 heap-checker 、 heap-profiler 和 cpu-profiler 共 4 个组件，在只 用 TCMalloc 的场景下，可以不编译其他三个组件，使用 tcmalloc_minimal 就足够。 下面介绍在 Linux SUSE x86 上安装 TCMalloc 动态库的过程。 安装 TCMalloc 从 http://code.google.com/p/google-perftools/ 下载源码包，现在最新版本是 1.4 。如果机器联网，直接： wget http://google-perftools.googlecode.com

概述： 又到了一个总结提炼的阶段，这次想具体聊聊游戏引擎中使用的内存管理模块 tcmalloc 组件的使用心得。项目的前期曾经遇到过内存瓶颈，特别是 windows 系统下的客户端程序在经历长时间运行之后会出现内存占用率很高疑似泄漏的现象，排查了很久都没有找到原因，甚至一度无法定位问题出自游戏脚本层还是引擎层，后来在引擎中链接了 tcmalloc 组件，通过实时 dump 程序的内存信息最终找出了泄漏的元凶。 tcmalloc 的另一个优势就是通过高效率内存分配来提高游戏运行时性能，不得不说在使用 tcmalloc 之后，整个游戏的稳定性和效率都有了很大的提升。为了今后更有效和稳定地使用 tcmalloc 组件，就在这里深入剖析一下这个神器。 Tcmalloc 是 Google Perftools 中的一个组件，提供一整套高效健壮的内存管理方案，比传统 glibc 的内存分配和释放要快数倍；其次，基于 tcmalloc 之上的 heapprofiler 可以实时 dump 程序中 heap 的使用信息，是一个很好的检测内存泄漏的辅助工具；同时 tcmalloc 的使用又是极其方便，只需要在编译时增加一个链接选项，就可以无缝拦截 (patch) 原生操作系统运行库中的内存分配和释放接口，而无需修改已经完成的项目工程代码，大大减少移植整合的成本。 在 windows 平台下，

tcmalloc/jemalloc are improved memory allocators, and memory pool is also introduced for better memory allocation. So what are the differences between them and how to choose them in my application? This blog has links to detailed description of all the popular mallocs. And this article cites one critical difference beween tcmalloc and jemalloc and advises which one to choose. And this article completely describes the algorithm behind jemalloc 来源： https://stackoverflow.com/questions/9866145/whatre-the-differences-between-tcmalloc-jemalloc-and-memory-pool

When I use LD_PRELOAD=/usr/local/lib/libtcmalloc.so , all my calls to malloc become tcmalloc calls. However, when I link statically against libtcmalloc, I find that straight malloc is getting called unless I still use the LD_PRELOAD setting. So how can I statically compile against tcmalloc in such a way that my mallocs hook into tcmalloc? Notes: I'm using lots of C++ new etc, so just #defining malloc to tcmalloc won't work Possibly I have to use malloc_hook myself, but I would have thought I could get tcmalloc to do it for me, since it clearly is doing it when linking dynamically Symbols are

I compiled Python 2.6.6 with google-perf tools (tcmalloc) library to eliminate some of the memory issues I was having with the default 2.6.5. After getting 2.6.6 going it seems to not work becuase I think having issues with the default 2.6.5 install in Ubuntu. Will none of the binaries installed from the software channel like wxPython and setuptools work properly with 2.6.6. Do these need to be recompiled? Any other suggestions to get it working smoothly. Can I still set 2.6.5 as default without changing the Path? The path looks in usr/local/bin first. A good general rule of thumb is to NEVER