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  • jemalloc

    2019-10-06 00:52:22
    jemalloc jemallocjemallocjemalloc is a general-purpose scalable concurrent malloc(3) implementation. There are several divergent vers...

    jemalloc

    jemalloc

    jemalloc is a general-purpose scalable concurrent malloc(3) implementation. There are several divergent versions of jemalloc in active use, including:

    • The canonical jemalloc distribution available via this website, which currently targets Linux, FreeBSD, Mac OS X, and Microsoft Windows.

    • FreeBSD's default system allocator. This was the first public use of jemalloc, and it is still author-maintained.

    • NetBSD's default system allocator (jemalloc.c).

    • Mozilla Firefox's allocator (source code), specifically for Microsoft Windows-related platforms, Solaris, and Linux. There is Apple Mac OS X support code as well, but it has yet to be used in a release.

    Documentation

    jemalloc was originally described in a paper I presented at the BSDcan conference in 2006. More recently I wrote a Facebook Engineering Blog Post which corresponds to jemalloc 2.1.0. The jemalloc(3) manual page completely documents the API, as well as run-time configuration.

    Mailing lists

    There are two mailing lists devoted to jemalloc:

     

    History

    jemalloc started out as the memory allocator for a programming language runtime in 2005, but language design changes made the allocator superfluous. At the time, FreeBSD was in need of an SMP-scalable allocator, so I integrated jemalloc into FreeBSD's libc, and then made a long series of improvements to scalability and fragmentation behavior.

    In late 2007, the Mozilla Project was hard at work improving Firefox's memory usage for the 3.0 release, and jemalloc was used to solve fragmentation problems for Firefox on Microsoft Windows platforms. You can read here about the fruits of that labor. I made many enhancements to jemalloc while developing for Mozilla, and all of the generic algorithmic improvements were incorporated into FreeBSD's jemalloc. More recently, Mozilla sponsored integration of Apple Mac OS X support into the stand-alone jemalloc.

    Since 2009 I have adapted jemalloc to handle the extreme loads Facebook servers commonly operate under. Facebook uses jemalloc in many components that are integral to serving its website. Facebook supports numerous open source projects, and is to thank for sponsoring many of the features that first appeared in the stand-alone jemalloc.


    Copyright © 2012 Jason Evans < jasone@canonware.com>.
    posted on 2012-10-15 19:30  lexus 阅读( ...) 评论( ...) 编辑 收藏

    转载于:https://www.cnblogs.com/lexus/archive/2012/10/15/2724902.html

    展开全文
  • jemalloc 性能测试

    2018-07-10 23:23:03
    自己写的jemalloc 多线程性能测试例子, ide用的xcode, jemalloc需要自己下载编译
  • jemalloc.rar

    2020-07-18 10:50:01
    CentOS7下jemalloc完整rpm安装包 安装步骤,参考https://www.cnblogs.com/wdw984/p/13330761.html
  • I followed the jemalloc instructions and setup the jemalloc on centOS 7. However, soon after settingexport LD_PRELOAD=/usr/local/lib/libjemalloc.soexport MALLOC_CONF=prof_leak:true,lg_prof_sample:50,l...

    I followed the jemalloc instructions and setup the jemalloc on centOS 7. However, soon after setting

    export LD_PRELOAD=/usr/local/lib/libjemalloc.so

    export MALLOC_CONF=prof_leak:true,lg_prof_sample:50,lg_prof_interval:62,prof_final:true

    environment variables, I could see a lot of jeprof.*.heap files being written to my current directory. I didn't start my jetty server at all, still, so many files are generated. Which process is generating it?

    When I tried to start the application as follows

    $LD_PRELOAD $MALLOC_CONF $JAVA_HOME/java/ Test

    It resulted in Segmentation fault, but started writing many files continuously.

    I tried to open a jeprof.*.heap like this

    jeprof --show_bytes `which w` jeprof.47757.0.f.heap

    top

    this gave me 0 bytes. Tried to generate gif file even that file was empty.

    How can I fix this?

    I was able to get the below details

    Using local file /bin/java.

    Using local file jeprof.57473.0.f.heap.

    Total: 79372091 B

    78084060 98.4% 98.4% 78084060 98.4% je_prof_backtrace

    1288031 1.6% 100.0% 1474342 1.9% Java_java_util_zip_ZipFile_getZipMessage

    0 0.0% 100.0% 6889972 8.7% 0x00007f3d5ebac3e6

    0 0.0% 100.0% 270421 0.3% 0x00007f3d5ebb8a79

    0 0.0% 100.0% 727762 0.9% 0x00007f3d5ebb8a87

    0 0.0% 100.0% 589239 0.7% 0x00007f3d5ebb9ab2

    0 0.0% 100.0% 854269 1.1% 0x00007f3d5ebb9ac0

    0 0.0% 100.0% 270421 0.3% 0x00007f3d5ebb9cb7

    0 0.0% 100.0% 135210 0.2% 0x00007f3d5ebbc5fa

    0 0.0% 100.0% 135210 0.2% 0x00007f3d5ebbc768

    0 0.0% 100.0% 135210 0.2% 0x00007f3d5ee57146

    0 0.0% 100.0% 143743 0.2% 0x00007f3d5ee8bc25

    0 0.0% 100.0% 444413 0.6% 0x00007f3d5ef13945

    0 0.0% 100.0% 136258 0.2% 0x00007f3d5ef764fb

    0 0.0% 100.0% 8463202 10.7% 0x00007f3d5efbdb8a

    0 0.0% 100.0% 143743 0.2% 0x00007f3d5f220c67

    0 0.0% 100.0% 135210 0.2% 0x00007f3d5f3a5c65

    0 0.0% 100.0% 55473738 69.9% AsyncGetCallTrace

    0 0.0% 100.0% 48103708 60.6% JLI_GetStdArgc

    0 0.0% 100.0% 48103708 60.6% JNI_CreateJavaVM

    0 0.0% 100.0% 11897251 15.0% JNI_GetCreatedJavaVMs

    0 0.0% 100.0% 11897251 15.0% JVM_DefineClassWithSource

    0 0.0% 100.0% 271469 0.3% JVM_FindClassFromBootLoader

    0 0.0% 100.0% 431486 0.5% JVM_FindClassFromCaller

    0 0.0% 100.0% 131120 0.2% JVM_FindLoadedClass

    0 0.0% 100.0% 76994237 97.0% JVM_FindSignal

    0 0.0% 100.0% 148137 0.2% JVM_GetCPMethodClassNameUTF

    0 0.0% 100.0% 148137 0.2% JVM_GetCPMethodSignatureUTF

    0 0.0% 100.0% 135210 0.2% JVM_GetClassDeclaredFields

    0 0.0% 100.0% 405631 0.5% JVM_GetClassName

    0 0.0% 100.0% 143743 0.2% JVM_IHashCode

    0 0.0% 100.0% 143743 0.2% JVM_MonitorWait

    0 0.0% 100.0% 431486 0.5% JVM_RawMonitorExit

    0 0.0% 100.0% 659324 0.8% JVM_StartThread

    0 0.0% 100.0% 77220036 97.3% JVM_handle_linux_signal

    0 0.0% 100.0% 11897251 15.0% Java_java_lang_ClassLoader_defineClass1

    0 0.0% 100.0% 271469 0.3% Java_java_lang_ClassLoader_findBootstrapClass

    0 0.0% 100.0% 431486 0.5% Java_java_lang_Class_forName0

    0 0.0% 100.0% 592551 0.7% Java_java_util_zip_Inflater_inflateBytes

    0 0.0% 100.0% 134688 0.2% Java_java_util_zip_Inflater_init

    0 0.0% 100.0% 1117359 1.4% Java_java_util_zip_ZipFile_open

    0 0.0% 100.0% 75438262 95.0% SUNWprivate_1.1

    0 0.0% 100.0% 296275 0.4% VerifyClassForMajorVersion

    0 0.0% 100.0% 356982 0.4% ZIP_Open

    0 0.0% 100.0% 1474342 1.9% ZIP_Unlock

    0 0.0% 100.0% 176271 0.2% _GLOBAL__sub_I_eh_alloc.cc

    0 0.0% 100.0% 176271 0.2% _GLOBAL__sub_I_eh_alloc.cc (inline)

    0 0.0% 100.0% 59721527 75.2% __clone

    0 0.0% 100.0% 176271 0.2% __static_initialization_and_destruction_0 (inline)

    0 0.0% 100.0% 176271 0.2% _dl_init_internal

    0 0.0% 100.0% 176271 0.2% _dl_start_user

    0 0.0% 100.0% 131184 0.2% fork1

    0 0.0% 100.0% 78084060 98.4% imalloc (inline)

    0 0.0% 100.0% 78084060 98.4% imalloc_body (inline)

    0 0.0% 100.0% 592551 0.7% inflate

    0 0.0% 100.0% 592551 0.7% inflateBackEnd

    0 0.0% 100.0% 134688 0.2% inflateInit2_

    0 0.0% 100.0% 78084060 98.4% je_malloc_default

    0 0.0% 100.0% 78084060 98.4% prof_alloc_prep (inline)

    0 0.0% 100.0% 59721527 75.2% start_thread

    But I don't see any my JNI class names from .so file. I could see many memory addresses. Am I missing anything or the symbols are not resolved correctly?

    Thanks

    Raj

    解决方案

    When you export LD_PRELOAD environment variable, jemalloc library gets loaded into every single process you run, including every bash command.

    If you want to apply it only to Java process, use

    LD_PRELOAD=/usr/local/lib/libjemalloc.so $JAVA_HOME/bin/java Test

    i.e. set the variable (without export) right before the java command.

    展开全文
  • Jemalloc安装

    2021-08-03 18:59:49
    unzip jemalloc-5.2.1.zip 3、编译安装 cd jemalloc-5.2.1 ./autogen.sh ./configure make make install 4、找到jemalloc的安装路径,并将其填写到speccpu cfg配置文件的相应位置。 添加优化参数 -L/usr/local...

    1、下载安装包
    链接:https://pan.baidu.com/s/12_YPoJ3cBomy_5x1M4PapQ
    提取码:lqx1

    2、解压

    unzip jemalloc-5.2.1.zip
    

    3、编译安装

    cd jemalloc-5.2.1
    
    ./autogen.sh
    
    ./configure
    
    make
    
    make install
    

    4、找到jemalloc的安装路径,并将其填写到speccpu cfg配置文件的相应位置。
    添加优化参数 -L/usr/local/lib -W1,–rpath=/usr/local/lib --ljemalloc

    展开全文
  • jemalloc本机win32端口
  • jemalloc实验 jemalloc的性能测试或系统基准 该存储库包含对jemalloc开发有用的程序,但它们的可移植性或精巧程度不足以驻留在主存储库中。 在这里,我们对语言,依赖项和构建环境有一些宽松的约束。 需要安装的库...
  • myRedisNetDemo-jemalloc

    2018-02-28 17:24:37
    把redis源码的linux网络库提取出来,自己封装成通用库使用.使用了jemalloc
  • myRedisNetDemo-jemalloc-20180609myRedisNetDemo-jemalloc-20180609myRedisNetDemo-jemalloc-20180609
  • Jemalloc优化MySQL和Nginx

    2020-09-02 21:58:01
    主要介绍了Jemalloc优化MySQL和Nginx的相关资料,需要的朋友可以参考下
  • jemalloc 编译

    2019-11-05 09:27:42
    yum -y install docbook-style-xsl ./autogen.sh --with-jemalloc-prefix=je_--disable-libdl--enable-lazy-lock make dist make make install

    yum -y install docbook-style-xsl

     

    ./autogen.sh --with-jemalloc-prefix=je_  --disable-libdl --enable-lazy-lock

     

    make dist
    make
    make install

    展开全文
  • 把redis源码的linux网络库提取出来,自己封装成通用库使用.使用了jemalloc。20180301
  • jemalloc is a general purpose malloc(3) implementation that emphasizes fragmentation avoidance and scalable concurrency support. jemalloc first came into use as the FreeBSD libc allocator in 2005, and...
  • jemalloc C++实践

    2021-01-13 14:30:06
    jemalloc是一种通用的malloc(3)实现,优点是避免内存碎片和可伸缩并发支持。 下载源码 wget https://github.com/jemalloc/jemalloc/releases/download/5.2.1/jemalloc-5.2.1.tar.bz2 解压 tar -jxvf jemalloc-5.2.1...
  • jemalloc在linux上从安装到使用上次在引导大家安装redis时提到可能会报错: 发现了redis有用到jemalloc。首先,jemalloc是干什么的?我们看看作者自己的介绍:jemalloc is a general purpose malloc(3) ...
  • 开源库jemalloc简介.pdf

    2021-09-14 16:59:20
    开源库jemalloc简介.pdf
  • redis编译报致命错误:jemalloc/jemalloc.h:没有那个文件或目录分配器allocator,如果有MALLOC 这个 环境变量, 会有用这个环境变量的 去建立Redis。而且libc 并不是默认的分配器, 默认的是 jemalloc, 因为 ...
  • jemalloc 测试

    2014-10-30 18:02:00
    jemalloc安装 wget http://www.canonware.com/download/jemalloc/jemalloc-3.6.0.tar.bz2 tar xjf jemalloc-3.6.0.tar.bz2 cd jemalloc-3.6.0 ./configure make && make install echo '/usr/local/...
  • linux安装jemalloc

    千次阅读 2019-02-26 10:50:13
    wget https://github.com/jemalloc/jemalloc/releases/download/5.0.1/jemalloc-5.0.1.tar.bz2...tar -jxvf jemalloc-5.0.1.tar.bz2 cd jemalloc-5.0.1 sudo apt-get install autogen autoconf ./autogen.sh make -...
  • jemalloc-4.4.0.tar.bz2

    2021-04-19 14:07:09
    jemalloc-4.4.0.tar.bz2
  • jemalloc-4.2.1.tar.gz

    2020-06-16 17:53:37
    JeMalloc 是一款内存分配器,与其它内存分配器相比,它最大的优势在于多线程情况下的高性能以及内存碎片的减少。 手动变异安装nginx,或者tengine的时候需要配合安装管理内存的工具模块 jemalloc,源资源在国内不好...
  • linux下安装jemalloc

    千次阅读 2019-06-02 21:55:39
    1.下载解压jemalloc 1.下载地址:https://github.com/jemalloc/jemalloc/releases我选择最新版本5.2.0 2.进入src目录 cd /usr/local/src 执行wget ...

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