linux中 pmap 命令详解

通过查看帮助，返回了如下信息：

Usage: pmap [options] pid [pid ...]
Options:
 -x, --extended       show details 
 -X             show even more details
      WARNING: format changes according to /proc/PID/smaps
 -XX             show everything the kernel provides
 -c, --read-rc        read the default rc
 -C, --read-rc-from=<file>  read the rc from file
 -n, --create-rc       create new default rc
 -N, --create-rc-to=<file>  create new rc to file
      NOTE: pid arguments are not allowed with -n, -N
 -d, --device        show the device format
 -q, --quiet         do not display header and footer
 -p, --show-path       show path in the mapping
 -A, --range=<low>[,<high>] limit results to the given range
 -h, --help   display this help and exit -V, --version output version information and exit
For more details see pmap(1).

然后列出某个进程(PID:8868)的信息时如下：

pmap -x 8868
Address      Kbytes   RSS  Dirty Mode Mapping
00007f789ec2d000  1668  1384    0 r-x-- libc-2.19.so
00007f789edce000  2048    0    0 ----- libc-2.19.so
00007f789efce000   16   16   16 r---- libc-2.19.so
00007f789efd2000    8    8    8 rw--- libc-2.19.so
00000000020e0000  4008  4008  4008 rw---  [ anon ]
00007f787c000000   132   24   24 rw---  [ anon ]
00007f787c021000  65404    0    0 -----  [ anon ]
00007f7880000000   132   12   12 rw---  [ anon ]
00007f7880021000  65404    0    0 -----  [ anon ]
00007f7884000000   148   92   92 rw---  [ anon ]
00007f7884025000  65388    0    0 -----  [ anon ]

以上列表项的含义如下:

Address: 内存分配地址

Kbytes:   实际分配的内存大小

RSS:       程序实际占用的内存大小

Mapping: 分配该内存的模块的名称

总结