linux内存分析命令 Linux進程內存分析pmap命令

轉自: /u013982161/article/details/52654256

名稱：

pmap - report memory map of a process(查看進程的內存映像信息)

用法

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

pmap -V

選項含義

-x extended Show the extended format. 顯示擴展格式

-ddevice Show the deviceformat. 顯示設備格式

-q quiet Do not display some header/footerlines. 不顯示頭尾行

-V show version Displays version of program. 顯示版本

擴展格式和設備格式域：

Address: start address ofmap 映像起始地址

Kbytes:size of map in kilobytes 映像大小

RSS: resident set size inkilobytes 駐留集大小

Dirty: dirty pages (both sharedand private) in kilobytes 臟頁大小

Mode: permissions on map 映像權限: 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]為已分配內存[stack]為程序堆棧

Offset:offset into the file 文件偏移

Device: device name(major:minor) 設備名

舉例：

查看進程1的設備格式

[root@C44 ~]# pmap -d 1

1:init [5]

AddressKbytes Mode Offset Device Mapping

00934000 88 r-x-- 0000000000000000 008:00005ld-2.3.4.so

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

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

0094e0001188 r-x-- 0000000000000000 008:00005 libc-2.3.4.so

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

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

00a7b000 8 rw--- 0000000000a7b000 000:00000 [ anon ]

00a85000 52 r-x-- 0000000000000000 008:00005libsepol.so.1

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

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

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

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

08048000 28 r-x-- 0000000000000000 008:00005 init

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

084e1000132 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 表示該進程映射的虛擬地址空間大小，也就是該進程預先分配的虛擬內存大小，即ps出的vsz

writeable/private 表示進程所占用的私有地址空間大小，也就是該進程實際使用的內存大小

shared 表示進程和其他進程共享的內存大小

查看進程1的設備格式，不顯示頭尾行

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

1:init [5]

00934000 88 r-x-- 0000000000000000 008:00005ld-2.3.4.so

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

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

0094e0001188 r-x-- 0000000000000000 008:00005 libc-2.3.4.so

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

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

00a7b000 8 rw--- 0000000000a7b000 000:00000 [ anon ]

00a85000 52 r-x-- 0000000000000000 008:00005libsepol.so.1

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

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

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

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

08048000 28 r-x-- 0000000000000000 008:00005 init

0804f0004 rw--- 0000000000007000008:00005 init

084e1000132 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 ~]#

查看進程1的擴展格式

[root@C44 ~]# pmap -x 1

1:init [5]

AddressKbytes RSS AnonLocked 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

0094e0001188 - -- 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

00a9300032 -- - rw--- [ anon ]

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

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

08048000 28- - - r-x--init

0804f000 4- -- rw--- init

084e1000132 - -- rw--- [ anon ]

b7f5d000 8- - - rw--- [ anon ]

bffee000 72- - - rw--- [ stack ]

ffffe000 4- - - ----- [ anon ]

-------- ------- ------- ------- -------

total kB1700 - --

[root@C44 ~]#

循環顯示進程3066的設備格式的最后1行，間隔2秒，

[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

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