Analysis of pmap command examples in Linux-Linux Operation and Maintenance-php.cn

Analysis of pmap command examples in Linux

黄舟

Release： 2017-09-30 11:12:18

Original

2664 people have browsed it

This article mainly introduces the detailed explanation of the pmap command in Linux. Friends who need it can refer to it

By viewing the help, the following information was returned:

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).

Copy after login

Then list the information of a certain process (PID:8868) as follows:

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 ]

Copy after login

The meaning of the above list items is as follows:

Address: Memory Allocation address

Kbytes: Actual allocated memory size

RSS: Actual memory size occupied by the program

Mapping: Name of the module that allocates the memory

Summarize

The above is the detailed content of Analysis of pmap command examples in Linux. For more information, please follow other related articles on the PHP Chinese website!