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-d11:init[5]
AddressKbytesModeOffsetDeviceMapping0093400088r-x--0000000000000000008:00005ld-2.3.4.so
0094a0004r----0000000000015000008:00005ld-2.3.4.so
0094b0004rw---0000000000016000008:00005ld-2.3.4.so
0094e0001188r-x--0000000000000000008:00005libc-2.3.4.so
00a770008r----0000000000129000008:00005libc-2.3.4.so
00a790008rw---000000000012b000008:00005libc-2.3.4.so
00a7b0008rw---0000000000a7b000000:00000[anon]
00a8500052r-x--0000000000000000008:00005libsepol.so.100a920004rw---000000000000c000008:00005libsepol.so.100a9300032rw---0000000000a93000000:00000[anon]
00d9d00052r-x--0000000000000000008:00005libselinux.so.100daa0004rw---000000000000d000008:00005libselinux.so.10804800028r-x--0000000000000000008:00005init
0804f0004rw---0000000000007000008:00005init
084e1000132rw---00000000084e1000000:00000[anon]
b7f5d0008rw---00000000b7f5d000000:00000[anon]
bffee00072rw---00000000bffee000000:00000[stack]
ffffe0004-----0000000000000000000:00000[anon]
mapped:1700Kwriteable/private:276Kshared: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-q11:init[5]
0093400088r-x--0000000000000000008:00005ld-2.3.4.so
0094a0004r----0000000000015000008:00005ld-2.3.4.so
0094b0004rw---0000000000016000008:00005ld-2.3.4.so
0094e0001188r-x--0000000000000000008:00005libc-2.3.4.so
00a770008r----0000000000129000008:00005libc-2.3.4.so
00a790008rw---000000000012b000008:00005libc-2.3.4.so
00a7b0008rw---0000000000a7b000000:00000[anon]
00a8500052r-x--0000000000000000008:00005libsepol.so.100a920004rw---000000000000c000008:00005libsepol.so.100a9300032rw---0000000000a93000000:00000[anon]
00d9d00052r-x--0000000000000000008:00005libselinux.so.100daa0004rw---000000000000d000008:00005libselinux.so.10804800028r-x--0000000000000000008:00005init
0804f0004rw---0000000000007000008:00005init
084e1000132rw---00000000084e1000000:00000[anon]
b7f5d0008rw---00000000b7f5d000000:00000[anon]
bffee00072rw---00000000bffee000000:00000[stack]
ffffe0004-----0000000000000000000:00000[anon]
[root@C44~]#
查看进程1的扩展格式
[root@C44~]#pmap-x11:init[5]
AddressKbytesRSSAnonLockedModeMapping0093400088---r-x--ld-2.3.4.so
0094a0004---r----ld-2.3.4.so
0094b0004---rw---ld-2.3.4.so
0094e0001188---r-x--libc-2.3.4.so
00a770008---r----libc-2.3.4.so
00a790008---rw---libc-2.3.4.so
00a7b0008---rw---[anon]
00a8500052---r-x--libsepol.so.100a920004---rw---libsepol.so.100a9300032---rw---[anon]
00d9d00052---r-x--libselinux.so.100daa0004---rw---libselinux.so.10804800028---r-x--init
0804f0004---rw---init
084e1000132---rw---[anon]
b7f5d0008---rw---[anon]
bffee00072---rw---[stack]
ffffe0004--------[anon]------------------------------------totalkB1700---[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~]#whiletrue;dopmap-d3066|tail-1;sleep2;donemapped:5412Kwriteable/private:2028Kshared:0K
mapped:5412Kwriteable/private:2028Kshared:0K
mapped:5412Kwriteable/private:2028Kshared:0K
mapped:5412Kwriteable/private:2028Kshared:0K
mapped:5412Kwriteable/private:2028Kshared:0K
mapped:5412Kwriteable/private:2028Kshared:0K
mapped:5412Kwriteable/private:2028Kshared:0K
mapped:5412Kwriteable/private:2028Kshared:0K
mapped:5412Kwriteable/private:2028Kshared:0K
mapped:5412Kwriteable/private:2028Kshared:0K
mapped:5412Kwriteable/private:2028Kshared:0K
mapped:5412Kwriteable/private:2028Kshared:0K
mapped:5412Kwriteable/private:2028Kshared:0K
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