Linux进程内存分析pmap命令(转)

名称: pmap – report memory map of a process(查看进程的内存映像信息)用法 pmap [ -x | -d ] [ -q ] pids… pmap -V选项含义 -x extended Show the extended format. 显示扩展格式 -d device Show the device format. 显示设备格式 -q quiet Do not display some header/footer lines. 不显示头尾行 -V show version Displays version of program. 显示版本

扩展格式和设备格式域: Address: start address of map 映像起始地址 Kbytes: size of map in kilobytes 映像大小 RSS: resident set size in kilobytes 驻留集大小 Dirty: dirty pages (both shared and private) in kilobytes 脏页大小 Mode: permissions on map 映像权限: r=read, w=write, x=execute, s=shared, p=private (copy on write) Mapping: file backing the map , or ‘[ anon ]’ for allocated memory, or ‘[ stack ]’ for the program stack. 映像支持文件,[anon]为已分配内存 [stack]为程序堆栈 Offset: offset into the file 文件偏移 Device: device name (major:minor) 设备名

举例:

查看进程1的设备格式

[root@C44 ~]#  pmap -d 11:   init [5]                    Address   Kbytes Mode  Offset           Device    Mapping00934000      88 r-x-- 0000000000000000 008:00005 ld-2.3.4.so0094a000       4 r---- 0000000000015000 008:00005 ld-2.3.4.so0094b000       4 rw--- 0000000000016000 008:00005 ld-2.3.4.so0094e000    1188 r-x-- 0000000000000000 008:00005 libc-2.3.4.so00a77000       8 r---- 0000000000129000 008:00005 libc-2.3.4.so00a79000       8 rw--- 000000000012b000 008:00005 libc-2.3.4.so00a7b000       8 rw--- 0000000000a7b000 000:00000   [ anon ]00a85000      52 r-x-- 0000000000000000 008:00005 libsepol.so.100a92000       4 rw--- 000000000000c000 008:00005 libsepol.so.100a93000      32 rw--- 0000000000a93000 000:00000   [ anon ]00d9d000      52 r-x-- 0000000000000000 008:00005 libselinux.so.100daa000       4 rw--- 000000000000d000 008:00005 libselinux.so.108048000      28 r-x-- 0000000000000000 008:00005 init0804f000       4 rw--- 0000000000007000 008:00005 init084e1000     132 rw--- 00000000084e1000 000:00000   [ anon ]b7f5d000       8 rw--- 00000000b7f5d000 000:00000   [ anon ]bffee000      72 rw--- 00000000bffee000 000:00000   [ stack ]ffffe000       4 ----- 0000000000000000 000:00000   [ anon ]mapped: 1700K    writeable/private: 276K    shared: 0K[root@C44 ~]#  

最后一行的值mapped 表示该进程映射的虚拟地址空间大小,也就是该进程预先分配的虚拟内存大小,即ps出的vszwriteable/private 表示进程所占用的私有地址空间大小,也就是该进程实际使用的内存大小shared 表示进程和其他进程共享的内存大小

查看进程1的设备格式,不显示头尾行

[root@C44 ~]#  pmap -d -q 11:   init [5]                    00934000      88 r-x-- 0000000000000000 008:00005 ld-2.3.4.so0094a000       4 r---- 0000000000015000 008:00005 ld-2.3.4.so0094b000       4 rw--- 0000000000016000 008:00005 ld-2.3.4.so0094e000    1188 r-x-- 0000000000000000 008:00005 libc-2.3.4.so00a77000       8 r---- 0000000000129000 008:00005 libc-2.3.4.so00a79000       8 rw--- 000000000012b000 008:00005 libc-2.3.4.so00a7b000       8 rw--- 0000000000a7b000 000:00000   [ anon ]00a85000      52 r-x-- 0000000000000000 008:00005 libsepol.so.100a92000       4 rw--- 000000000000c000 008:00005 libsepol.so.100a93000      32 rw--- 0000000000a93000 000:00000   [ anon ]00d9d000      52 r-x-- 0000000000000000 008:00005 libselinux.so.100daa000       4 rw--- 000000000000d000 008:00005 libselinux.so.108048000      28 r-x-- 0000000000000000 008:00005 init0804f000       4 rw--- 0000000000007000 008:00005 init084e1000     132 rw--- 00000000084e1000 000:00000   [ anon ]b7f5d000       8 rw--- 00000000b7f5d000 000:00000   [ anon ]bffee000      72 rw--- 00000000bffee000 000:00000   [ stack ]ffffe000       4 ----- 0000000000000000 000:00000   [ anon ][root@C44 ~]#  

查看进程1的扩展格式

[root@C44 ~]#  pmap -x 11:   init [5]                    Address   Kbytes     RSS    Anon  Locked Mode   Mapping00934000      88       -       -       - r-x--  ld-2.3.4.so0094a000       4       -       -       - r----  ld-2.3.4.so0094b000       4       -       -       - rw---  ld-2.3.4.so0094e000    1188       -       -       - r-x--  libc-2.3.4.so00a77000       8       -       -       - r----  libc-2.3.4.so00a79000       8       -       -       - rw---  libc-2.3.4.so00a7b000       8       -       -       - rw---    [ anon ]00a85000      52       -       -       - r-x--  libsepol.so.100a92000       4       -       -       - rw---  libsepol.so.100a93000      32       -       -       - rw---    [ anon ]00d9d000      52       -       -       - r-x--  libselinux.so.100daa000       4       -       -       - rw---  libselinux.so.108048000      28       -       -       - r-x--  init0804f000       4       -       -       - rw---  init084e1000     132       -       -       - rw---    [ anon ]b7f5d000       8       -       -       - rw---    [ anon ]bffee000      72       -       -       - rw---    [ stack ]ffffe000       4       -       -       - -----    [ anon ]-------- ------- ------- ------- -------total kB    1700       -       -       -[root@C44 ~]#  

循环显示进程3066的设备格式的最后1行,间隔2秒,

[root@C44 ~]#  while true; do pmap -d  3066 | tail -1; sleep 2; donemapped: 5412K    writeable/private: 2028K    shared: 0Kmapped: 5412K    writeable/private: 2028K    shared: 0Kmapped: 5412K    writeable/private: 2028K    shared: 0Kmapped: 5412K    writeable/private: 2028K    shared: 0Kmapped: 5412K    writeable/private: 2028K    shared: 0Kmapped: 5412K    writeable/private: 2028K    shared: 0Kmapped: 5412K    writeable/private: 2028K    shared: 0Kmapped: 5412K    writeable/private: 2028K    shared: 0Kmapped: 5412K    writeable/private: 2028K    shared: 0Kmapped: 5412K    writeable/private: 2028K    shared: 0Kmapped: 5412K    writeable/private: 2028K    shared: 0Kmapped: 5412K    writeable/private: 2028K    shared: 0Kmapped: 5412K    writeable/private: 2028K    shared: 0K

穷则思变,差则思勤!没有比人更高的山没有比脚更长的路。

Linux进程内存分析pmap命令(转)

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