Linux性能测试之pmap命令详解

pmap - report memory map of a process(查看进程的内存映像信息)

pmap [ -x | -d ] [ -q ] pids...

   pmap -V

-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

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

[root@C44 ~]# pmap -d 1

1:  init [5]         

Address  Kbytes Mode Offset      Device  Mapping

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.1

00a92000    4 rw--- 000000000000c000 008:00005 libsepol.so.1

00a93000   32 rw--- 0000000000a93000 000:00000  [ anon ]

00d9d000   52 r-x-- 0000000000000000 008:00005 libselinux.so.1

00daa000    4 rw--- 000000000000d000 008:00005 libselinux.so.1

08048000   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 ~]#

[root@C44 ~]# pmap -d -q 1

1:  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.1

00a92000    4 rw--- 000000000000c000 008:00005 libsepol.so.1

00a93000   32 rw--- 0000000000a93000 000:00000  [ anon ]

00d9d000   52 r-x-- 0000000000000000 008:00005 libselinux.so.1

00daa000    4 rw--- 000000000000d000 008:00005 libselinux.so.1

08048000   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 ~]#

[root@C44 ~]# pmap -x 1

1:  init [5]         

Address  Kbytes   RSS  Anon Locked Mode  Mapping

00934000   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.1

00a92000    4    -    -    - rw--- libsepol.so.1

00a93000   32    -    -    - rw---  [ anon ]

00d9d000   52    -    -    - r-x-- libselinux.so.1

00daa000    4    -    -    - rw--- libselinux.so.1

08048000   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 ~]#

[root@C44 ~]# while true; do pmap -d 3066 | tail -1; sleep 2; done

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

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