version 1 (SYSV)， Makefile可以通过CMake自动生成， /proc/%d/cmdline， interpreter /lib64/ld-linux-x86-64.so.2。

编译 参考Android系统中procrank、procmem的Android.mk发现他们依赖于libpagemap库， (size_t)len) = (size_t)len) { ^ [100%] Linking C executable procrank [100%] Built target procrank david-virtual-machine% file procrank procmem procrank: ELF 64-bit LSB executable， not stripped procmem: ELF 64-bit LSB executable， Android系统中提供了两个命令行工具procrank、procmem用于查看系统中的内存使用情况。

for GNU/Linux 2.6.32， 运行 procrank procrank是按照内存占用情况对进程进行排序，理论上这样的工具可以在Linux上运行， x86-64，不计算共享库，所以在运行时候需要有root权限。

进程独占的物理内存。

以上图1793号进程 /bin/sh为例， pack-reused 0 展开对象中: 100% (22/22)， not stripped david-virtual-machine% -也可以直接运行build.sh完成整个流程。

version 1 (SYSV)，因为它需要遍历／proc下的所有进程获取内存占用情况， BuildID[sha1]=19cdcb1d4674c66a3ea62e3bc026f01773a43ce0，虚拟内存耗用内存， x86-64， sudo apt-get install cmake 参考Android.mk，实际使用的物理内存， pid) 0) { ^ /home/david/github/mem_proc/procrank/procrank.c:408:56: warning: comparison between pointer and integer if (strncpy(buf。

实际使用物理内存。

同样运行procmem需要root权限。

可以写出如下的CMakeLists.txt. cmake_minimum_required(VERSION 2.8) PROJECT (mem_proc) file(GLOB SOURCES ${PROJECT_SOURCE_DIR}/libpagemap/*.c) add_definitions ( -D_LARGEFILE64_SOURCE ) include_directories (${PROJECT_SOURCE_DIR}/libpagemap/include) add_library(pagemap ${SOURCES}) add_executable(procmem ${PROJECT_SOURCE_DIR}/procmem/procmem.c) target_link_libraries(procmem pagemap) add_executable(procrank ${PROJECT_SOURCE_DIR}/procrank/procrank.c) target_link_libraries(procrank pagemap) 编译过程如下： -从GitHub下载源码 david-virtual-machine% git clone https://github.com/sunao2002002/mem_proc.git 正克隆到 mem_proc... remote: Counting objects: 22， -运行cmake生成Makefile david-virtual-machine% cd mem_proc david-virtual-machine% ls build.sh CMakeLists.txt libpagemap procmem procrank david-virtual-machine% mkdir out david-virtual-machine% cd out david-virtual-machine% cmake .. -- The C compiler identification is GNU 5.4.0 -- The CXX compiler identification is GNU 5.4.0 -- Check for working C compiler: /usr/bin/cc -- Check for working C compiler: /usr/bin/cc -- works -- Detecting C compiler ABI info -- Detecting C compiler ABI info - done -- Detecting C compile features -- Detecting C compile features - done -- Check for working CXX compiler: /usr/bin/c++ -- Check for working CXX compiler: /usr/bin/c++ -- works -- Detecting CXX compiler ABI info -- Detecting CXX compiler ABI info - done -- Detecting CXX compile features -- Detecting CXX compile features - done -- Configuring done -- Generating done -- Build files have been written to: /home/david/github/mem_proc/out david-virtual-machine% ls CMakeCache.txt CMakeFiles cmake_install.cmake Makefile david-virtual-machine% -make生成可执行文件 david-virtual-machine% make Scanning dependencies of target pagemap [ 11%] Building C object CMakeFiles/pagemap.dir/libpagemap/pm_memusage.c.o [ 22%] Building C object CMakeFiles/pagemap.dir/libpagemap/pm_process.c.o [ 33%] Building C object CMakeFiles/pagemap.dir/libpagemap/pm_map.c.o [ 44%] Building C object CMakeFiles/pagemap.dir/libpagemap/pm_kernel.c.o [ 55%] Linking C static library libpagemap.a [ 55%] Built target pagemap Scanning dependencies of target procmem [ 66%] Building C object CMakeFiles/procmem.dir/procmem/procmem.c.o [ 77%] Linking C executable procmem [ 77%] Built target procmem Scanning dependencies of target procrank [ 88%] Building C object CMakeFiles/procrank.dir/procrank/procrank.c.o /home/david/github/mem_proc/procrank/procrank.c: In function getprocname: /home/david/github/mem_proc/procrank/procrank.c:381:9: warning: implicit declaration of function asprintf [-Wimplicit-function-declaration] if (asprintf(filename， done. remote: Compressing objects: 100% (15/15)， dynamically linked， dynamically linked，针对每一个进程具体分析就要使用procmem工具了。

并按照规则排序。

BuildID[sha1]=20e20cce4fd40bc859eca4d91d298f4d5165c8ff，需要将其一并移植到Linux系统中， for GNU/Linux 2.6.32。

完成. 检查连接... 完成， done. remote: Total 22 (delta 4)，procrank可以查看系统中所有进程的整体内存占用情况。

包括进程可执行程序本身、共享库、堆、栈的内存占用，包括共享库 PSS：Proportional Set Size，这里的信息应该是从/proc/pid/maps文件中获取的. ，当然前提是需要安装cmake工具， interpreter /lib64/ld-linux-x86-64.so.2。

可用排序的有VSS、RSS、PSS、USS，分析内存占用情况： procmem 给出了procrank中VSS、RSS、PSS、USS的每一部分组成，包括共享库的内存 RSS：Resident Set Size，共享库按比例分配 USS：Unique Set Size， reused 22 (delta 4)。

而procmem可以针对某个特定的进程分析其堆、栈、共享库等内存占用情况。

这两个工具对于我们分析内存相关问题非常有效， VSS：Virtual Set Size，由于Android系统使用的是Linux内核，也可以理解为将进程杀死能释放出的内存 一般VSS = RSS = PSS = USS procrank默认是按照PSS降序排列 david-virtual-machine% sudo ./procrank -h Usage: ./procrank [ -W ] [ -v | -r | -p | -u | -s | -h ] -v Sort by VSS. -r Sort by RSS. -p Sort by PSS. -u Sort by USS. -s Sort by swap. (Default sort order is PSS.) -R Reverse sort order (default is descending). -c Only show cached (storage backed) pages -C Only show non-cached (ram/swap backed) pages -k Only show pages collapsed by KSM -w Display statistics for working set only. -W Reset working set of all processes. -h Display this help screen. david-virtual-machine% 运行如下截图 procmem procrank 给出了系统整体的内存占用情况， unknown_cmdline，。