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.so

0094a000       4 r---- 0000000000015000 008:00005 ld-2.3.4.so

0094b000       4 rw--- 0000000000016000 008:00005 ld-2.3.4.so

0094e000    1188 r-x-- 0000000000000000 008:00005 libc-2.3.4.so

00a77000       8 r---- 0000000000129000 008:00005 libc-2.3.4.so

00a79000       8 rw--- 000000000012b000 008:00005 libc-2.3.4.so

00a7b000       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 init

0804f000       4 rw--- 0000000000007000 008:00005 init

084e1000     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vsz

writeable/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.so

0094a000       4 r---- 0000000000015000 008:00005 ld-2.3.4.so

0094b000       4 rw--- 0000000000016000 008:00005 ld-2.3.4.so

0094e000    1188 r-x-- 0000000000000000 008:00005 libc-2.3.4.so

00a77000       8 r---- 0000000000129000 008:00005 libc-2.3.4.so

00a79000       8 rw--- 000000000012b000 008:00005 libc-2.3.4.so

00a7b000       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 init

0804f000       4 rw--- 0000000000007000 008:00005 init

084e1000     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.so

0094a000       4       -       -       - r----  ld-2.3.4.so

0094b000       4       -       -       - rw---  ld-2.3.4.so

0094e000    1188       -       -       - r-x--  libc-2.3.4.so

00a77000       8       -       -       - r----  libc-2.3.4.so

00a79000       8       -       -       - rw---  libc-2.3.4.so

00a7b000       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--  init

0804f000       4       -       -       - rw---  init

084e1000     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: 0K

mapped: 5412K    writeable/private: 2028K    shared: 0K

mapped: 5412K    writeable/private: 2028K    shared: 0K

mapped: 5412K    writeable/private: 2028K    shared: 0K

mapped: 5412K    writeable/private: 2028K    shared: 0K

mapped: 5412K    writeable/private: 2028K    shared: 0K

mapped: 5412K    writeable/private: 2028K    shared: 0K

mapped: 5412K    writeable/private: 2028K    shared: 0K

mapped: 5412K    writeable/private: 2028K    shared: 0K

mapped: 5412K    writeable/private: 2028K    shared: 0K

mapped: 5412K    writeable/private: 2028K    shared: 0K

mapped: 5412K    writeable/private: 2028K    shared: 0K

mapped: 5412K    writeable/private: 2028K    shared: 0K