1. top Tasks: 264 total, 1 running, 263 sleeping, 0 stopped, 0 zombieCpu(s): 0.3%us, 1.4%sy,
1. top
Tasks: 264 total, 1 running, 263 sleeping, 0 stopped, 0 zombieCpu(s): 0.3%us, 1.4%sy, 1.4%ni, 96.7%id, 0.1%wa, 0.0%hi, 0.1%si, 0.0%stMem: 8062796k total, 7543940k used, 518856k free, 177216k buffersSwap: 0k total, 0k used, 0k free, 5994368k cached PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND24027 root 20 0 2950m 62m 3492 S 2 0.8 0:03.85 nginx 1 root 20 0 1716 136 64 S 0 0.0 0:05.07 init 2 root 20 0 0 0 0 S 0 0.0 0:00.02 kthreadd 3 root 20 0 0 0 0 S 0 0.0 0:02.04 ksoftirqd/0 5 root 0 -20 0 0 0 S 0 0.0 0:00.00 kworker/0:0H 7 root 0 -20 0 0 0 S 0 0.0 0:00.00 kworker/u:0H 8 root RT 0 0 0 0 S 0 0.0 0:03.51 migration/0 9 root 20 0 0 0 0 S 0 0.0 0:00.00 rcu_bh 10 root 20 0 0 0 0 S 0 0.0 1:05.15 rcu_sched 11 root 20 0 0 0 0 S 0 0.0 0:00.90 ksoftirqd/1Mem/total： 物理内存总的大小
Mem/used： 物理内存已使用的大小
Mem/free： 物理内存空闲的大小
Mem/buffers： 物理内存缓冲的大小
Swap/cached： 交换分区缓冲的大小
VIRT： 进程使用的虚拟内存的大小
man给出的解释： Virtual Image. The total amount of virtual memory used by the task. It includes all code, data and shared libraries. plus pages that have been swapped out.
(Note: you can define the STATSIZE=1 evvironment variable and the VIRT will be calculated from the /proc/PID/state VmSize field)
RES： 进程实际使用的，未被换出的物理内存大小
man给出的解释： Resident size. The non-swapped physical memory a task has used.
RES = CODE + DATA.
SHR： 进程使用的虚拟内存中，被换出的大小
man给出的解释：Shared Mem size. The amount of shared memory used by a task. It simply reflects memory that could be potentially shared with other processes.
%MEM： 进程所占物理内存的百分比
man给出的解释：Memory usage. A task's currently used share of available pyhsical memory.
2. ps
root@localhost:/tmp# ps auxUSER PID %CPU %MEM VSZ RSS TTY STAT START TIME COMMANDroot 29060 24.0 0.8 3143100 66092 ? Sl 10:36 0:29 nginx: worker process%MEM： 进程所占物理内存的百分比
VSZ： 程序占用的虚拟内存大小
RSS：程序占用的物理内存大小（PS： 等同于top中RES的值）
3. pmap
pmap -d 1107011070: nginx: worker processAddress Kbytes Mode Offset Device Mapping0000000000400000 6060 r-x-- 0000000000000000 041:00094 nginx0000000000beb000 512 rw--- 00000000005eb000 041:00094 nginx0000000000c6b000 388 rw--- 0000000000000000 000:00000 [ anon ]000000000239d000 400 rw--- 0000000000000000 000:00000 [ anon ]0000000002401000 1588 rw--- 0000000000000000 000:00000 [ anon ]0000003014200000 928 r-x-- 0000000000000000 001:00000 libstdc++.so.600000030142e8000 2048 ----- 00000000000e8000 001:00000 libstdc++.so.600000030144e8000 28 r---- 00000000000e8000 001:00000 libstdc++.so.600000030144ef000 8 rw--- 00000000000ef000 001:00000 libstdc++.so.600000030144f1000 84 rw--- 0000000000000000 000:00000 [ anon ]00000030a8200000 84 r-x-- 0000000000000000 001:00000 libz.so.1.2.300000030a8215000 2044 ----- 0000000000015000 001:00000 libz.so.1.2.300000030a8414000 4 r---- 0000000000014000 001:00000 libz.so.1.2.300000030a8415000 4 rw--- 0000000000015000 001:00000 libz.so.1.2.30000003211800000 128 r-x-- 0000000000000000 001:00000 ld-2.12.so0000003211a1f000 4 r---- 000000000001f000 001:00000 ld-2.12.so0000003211a20000 4 rw--- 0000000000020000 001:00000 ld-2.12.so0000003211a21000 4 rw--- 0000000000000000 000:00000 [ anon ]0000003211c00000 8 r-x-- 0000000000000000 001:00000 libdl-2.12.so0000003211c02000 2048 ----- 0000000000002000 001:00000 libdl-2.12.so0000003211e02000 4 r---- 0000000000002000 001:00000 libdl-2.12.so0000003211e03000 4 rw--- 0000000000003000 001:00000 libdl-2.12.so0000003212000000 1572 r-x-- 0000000000000000 001:00000 libc-2.12.so0000003212189000 2044 ----- 0000000000189000 001:00000 libc-2.12.so0000003212388000 16 r---- 0000000000188000 001:00000 libc-2.12.so000000321238c000 4 rw--- 000000000018c000 001:00000 libc-2.12.so000000321238d000 20 rw--- 0000000000000000 000:00000 [ anon ]0000003212400000 92 r-x-- 0000000000000000 001:00000 libpthread-2.12.so0000003212417000 2048 ----- 0000000000017000 001:00000 libpthread-2.12.so0000003212617000 4 r---- 0000000000017000 001:00000 libpthread-2.12.so0000003212618000 4 rw--- 0000000000018000 001:00000 libpthread-2.12.so0000003212619000 16 rw--- 0000000000000000 000:00000 [ anon ]0000003212c00000 524 r-x-- 0000000000000000 001:00000 libm-2.12.so0000003212c83000 2044 ----- 0000000000083000 001:00000 libm-2.12.so0000003212e82000 4 r---- 0000000000082000 001:00000 libm-2.12.so0000003212e83000 4 rw--- 0000000000083000 001:00000 libm-2.12.so0000003213000000 28 r-x-- 0000000000000000 001:00000 librt-2.12.so0000003213007000 2044 ----- 0000000000007000 001:00000 librt-2.12.so0000003213206000 4 r---- 0000000000006000 001:00000 librt-2.12.so0000003213207000 4 rw--- 0000000000007000 001:00000 librt-2.12.so0000003214800000 88 r-x-- 0000000000000000 001:00000 libgcc_s-4.4.6-20120305.so.10000003214816000 2044 ----- 0000000000016000 001:00000 libgcc_s-4.4.6-20120305.so.10000003214a15000 4 rw--- 0000000000015000 001:00000 libgcc_s-4.4.6-20120305.so.10000003215000000 88 r-x-- 0000000000000000 001:00000 libnsl-2.12.so0000003215016000 2044 ----- 0000000000016000 001:00000 libnsl-2.12.so0000003215215000 4 r---- 0000000000015000 001:00000 libnsl-2.12.so0000003215216000 4 rw--- 0000000000016000 001:00000 libnsl-2.12.so0000003215217000 8 rw--- 0000000000000000 000:00000 [ anon ]0000003216c00000 28 r-x-- 0000000000000000 001:00000 libcrypt-2.12.so0000003216c07000 2048 ----- 0000000000007000 001:00000 libcrypt-2.12.so0000003216e07000 4 r---- 0000000000007000 001:00000 libcrypt-2.12.so0000003216e08000 4 rw--- 0000000000008000 001:00000 libcrypt-2.12.so0000003216e09000 184 rw--- 0000000000000000 000:00000 [ anon ]0000003217000000 372 r-x-- 0000000000000000 001:00000 libfreebl3.so000000321705d000 2044 ----- 000000000005d000 001:00000 libfreebl3.so000000321725c000 4 r---- 000000000005c000 001:00000 libfreebl3.so000000321725d000 4 rw--- 000000000005d000 001:00000 libfreebl3.so000000321725e000 16 rw--- 0000000000000000 000:00000 [ anon ]00000036c0e00000 1484 r-x-- 0000000000000000 001:00000 libcrypto.so.1.0.000000036c0f73000 2048 ----- 0000000000173000 001:00000 libcrypto.so.1.0.000000036c1173000 100 r---- 0000000000173000 001:00000 libcrypto.so.1.0.000000036c118c000 40 rw--- 000000000018c000 001:00000 libcrypto.so.1.0.000000036c1196000 16 rw--- 0000000000000000 000:00000 [ anon ]00007fcfe4000000 160 rw--- 0000000000000000 000:00000 [ anon ]00007fcfe4028000 65376 ----- 0000000000000000 000:00000 [ anon ]00007fcfec000000 192 rw--- 0000000000000000 000:00000 [ anon ]00007fcfec030000 65344 ----- 0000000000000000 000:00000 [ anon ]00007fcff0000000 448 rw--- 0000000000000000 000:00000 [ anon ]00007fcff0070000 65088 ----- 0000000000000000 000:00000 [ anon ]00007fcff4000000 132 rw--- 0000000000000000 000:00000 [ anon ]00007fcff4021000 65404 ----- 0000000000000000 000:00000 [ anon ]00007fcff8000000 444 rw--- 0000000000000000 000:00000 [ anon ]00007fcff806f000 65092 ----- 0000000000000000 000:00000 [ anon ]00007fcffc000000 132 rw--- 0000000000000000 000:00000 [ anon ]00007fcffc021000 65404 ----- 0000000000000000 000:00000 [ anon ]00007fd000000000 132 rw--- 0000000000000000 000:00000 [ anon ]00007fd000021000 65404 ----- 0000000000000000 000:00000 [ anon ]00007fd004000000 132 rw--- 0000000000000000 000:00000 [ anon ]00007fd004021000 65404 ----- 0000000000000000 000:00000 [ anon ]00007fd008000000 132 rw--- 0000000000000000 000:00000 [ anon ]00007fd008021000 65404 ----- 0000000000000000 000:00000 [ anon ]00007fd00c000000 132 rw--- 0000000000000000 000:00000 [ anon ]00007fd00c021000 65404 ----- 0000000000000000 000:00000 [ anon ]00007fd010000000 132 rw--- 0000000000000000 000:00000 [ anon ]00007fd010021000 65404 ----- 0000000000000000 000:00000 [ anon ]00007fd014000000 132 rw--- 0000000000000000 000:00000 [ anon ]00007fd014021000 65404 ----- 0000000000000000 000:00000 [ anon ]00007fd018000000 132 rw--- 0000000000000000 000:00000 [ anon ]00007fd018021000 65404 ----- 0000000000000000 000:00000 [ anon ]00007fd01c000000 132 rw--- 0000000000000000 000:00000 [ anon ]00007fd01c021000 65404 ----- 0000000000000000 000:00000 [ anon ]00007fd020000000 132 rw--- 0000000000000000 000:00000 [ anon ]00007fd020021000 65404 ----- 0000000000000000 000:00000 [ anon ]00007fd024000000 132 rw--- 0000000000000000 000:00000 [ anon ]00007fd024021000 65404 ----- 0000000000000000 000:00000 [ anon ]......00007fd0a43dd000 2048 rw--- 0000000000000000 000:00000 [ anon ]00007fd0a465e000 828 rw--- 0000000000000000 000:00000 [ anon ]00007fd0a472d000 48 r-x-- 0000000000000000 001:00000 libnss_files-2.12.so00007fd0a4739000 2048 ----- 000000000000c000 001:00000 libnss_files-2.12.so00007fd0a4939000 4 r---- 000000000000c000 001:00000 libnss_files-2.12.so00007fd0a493a000 4 rw--- 000000000000d000 001:00000 libnss_files-2.12.so00007fd0a493b000 40 r-x-- 0000000000000000 001:00000 libnss_nis-2.12.so00007fd0a4945000 2044 ----- 000000000000a000 001:00000 libnss_nis-2.12.so00007fd0a4b44000 4 r---- 0000000000009000 001:00000 libnss_nis-2.12.so00007fd0a4b45000 4 rw--- 000000000000a000 001:00000 libnss_nis-2.12.so00007fd0a4b46000 32 r-x-- 0000000000000000 001:00000 libnss_compat-2.12.so00007fd0a4b4e000 2044 ----- 0000000000008000 001:00000 libnss_compat-2.12.so00007fd0a4d4d000 4 r---- 0000000000007000 001:00000 libnss_compat-2.12.so00007fd0a4d4e000 4 rw--- 0000000000008000 001:00000 libnss_compat-2.12.so00007fd0a4d4f000 32 rw--- 0000000000000000 000:00000 [ anon ]00007fd0a4d57000 12 rw--- 0000000000000000 000:00000 [ anon ]00007fd0a4d5a000 4 rw-s- 0000000000000000 000:00004 zero (deleted)00007fd0a4d5b000 4 rw--- 0000000000000000 000:00000 [ anon ]00007fff0abc5000 532 rw--- 0000000000000000 000:00000 [ stack ]00007fff0ad9a000 4 r-x-- 0000000000000000 000:00000 [ anon ]ffffffffff600000 4 r-x-- 0000000000000000 000:00000 [ anon ]mapped: 3043680K writeable/private: 133268K shared: 4KAddress： start address of map
Kbytes： size of map in kilobytes
RSS：resident set size in kilobytes
Dirty： dirty pages (both shared and private) in kilybytes
Mode： permissions on map： read, write, execute, shared, private(copy on write)
Mapping： file backing the map, or '[anon]' for allocated memory, or '[stack]' for the program stack
Offset： offset into the file
Device： device name ( major:minor )
4. /proc/$PID/status
Name: nginxState: S (sleeping)Tgid: 4214Pid: 4214PPid: 4213TracerPid: 0Uid: 0 0 0 0Gid: 0 0 0 0FDSize: 512Groups: 0VmPeak: 5090636 kBVmSize: 4400960 kBVmLck: 0 kBVmPin: 0 kBVmHWM: 242376 kBVmRSS: 112612 kBVmData: 4356556 kBVmStk: 1052 kBVmExe: 6312 kBVmLib: 5544 kBVmPTE: 1152 kBVmSwap: 0 kBThreads: 52SigQ: 0/62389SigPnd: 0000000000000000ShdPnd: 0000000000000000SigBlk: 0000000000000000SigIgn: 0000000000001000SigCgt: 00000001f8016effCapInh: 0000000000000000CapPrm: 0000001fffffffffCapEff: 0000001fffffffffCapBnd: 0000001fffffffffSeccomp: 0Cpus_allowed: ffCpus_allowed_list: 0-7Mems_allowed: 1Mems_allowed_list: 0voluntary_ctxt_switches: 2853666nonvoluntary_ctxt_switches: 10003VmPeak： Peak virtual memory size
VmSize： Virtual memory size
VmLock： Locked memory size
VmHWM： Peak resident set size ("high water mark")
VmRSS： Resident set size
VmData： Size of data
VmStk： Size of stack
VmExe：Size of text segments
VmLib：Shared library code size
VmPTE：Page table entries size
注： ps 中的 VIRT 取值为 VmSize，RSS取值为VmRSS
5. /proc/$PID/maps
查看进程的地址映射表
00c81000-00cca000 rw-p 00000000 00:00 00218b000-021cd000 rw-p 00000000 00:00 0 [heap]021cd000-02acf000 rw-p 00000000 00:00 0 [heap]3014200000-30142e8000 r-xp 00000000 01:00 17822 /usr/lib64/libstdc++.so.630142e8000-30144e8000 ---p 000e8000 01:00 17822 /usr/lib64/libstdc++.so.630144e8000-30144ef000 r--p 000e8000 01:00 17822 /usr/lib64/libstdc++.so.630144ef000-30144f1000 rw-p 000ef000 01:00 17822 /usr/lib64/libstdc++.so.630144f1000-3014506000 rw-p 00000000 00:00 030a8200000-30a8215000 r-xp 00000000 01:00 49369 /lib64/libz.so.1.2.330a8215000-30a8414000 ---p 00015000 01:00 49369 /lib64/libz.so.1.2.330a8414000-30a8415000 r--p 00014000 01:00 49369 /lib64/libz.so.1.2.330a8415000-30a8416000 rw-p 00015000 01:00 49369 /lib64/libz.so.1.2.33211800000-3211820000 r-xp 00000000 01:00 17904 /lib64/ld-2.12.so3211a1f000-3211a20000 r--p 0001f000 01:00 17904 /lib64/ld-2.12.so3211a20000-3211a21000 rw-p 00020000 01:00 17904 /lib64/ld-2.12.so3211a21000-3211a22000 rw-p 00000000 00:00 03211c00000-3211c02000 r-xp 00000000 01:00 73 /lib64/libdl-2.12.so3211c02000-3211e02000 ---p 00002000 01:00 73 /lib64/libdl-2.12.so3211e02000-3211e03000 r--p 00002000 01:00 73 /lib64/libdl-2.12.so3211e03000-3211e04000 rw-p 00003000 01:00 73 /lib64/libdl-2.12.so3212000000-3212189000 r-xp 00000000 01:00 28852 /lib64/libc-2.12.so3212189000-3212388000 ---p 00189000 01:00 28852 /lib64/libc-2.12.so3212388000-321238c000 r--p 00188000 01:00 28852 /lib64/libc-2.12.so321238c000-321238d000 rw-p 0018c000 01:00 28852 /lib64/libc-2.12.so321238d000-3212392000 rw-p 00000000 00:00 03212400000-3212417000 r-xp 00000000 01:00 46636 /lib64/libpthread-2.12.so3212417000-3212617000 ---p 00017000 01:00 46636 /lib64/libpthread-2.12.so3212617000-3212618000 r--p 00017000 01:00 46636 /lib64/libpthread-2.12.so3212618000-3212619000 rw-p 00018000 01:00 46636 /lib64/libpthread-2.12.so3212619000-321261d000 rw-p 00000000 00:00 03212c00000-3212c83000 r-xp 00000000 01:00 30217 /lib64/libm-2.12.so3212c83000-3212e82000 ---p 00083000 01:00 30217 /lib64/libm-2.12.so3212e82000-3212e83000 r--p 00082000 01:00 30217 /lib64/libm-2.12.so3212e83000-3212e84000 rw-p 00083000 01:00 30217 /lib64/libm-2.12.so3213000000-3213007000 r-xp 00000000 01:00 60313 /lib64/librt-2.12.so3213007000-3213206000 ---p 00007000 01:00 60313 /lib64/librt-2.12.so3213206000-3213207000 r--p 00006000 01:00 60313 /lib64/librt-2.12.so3213207000-3213208000 rw-p 00007000 01:00 60313 /lib64/librt-2.12.so3214800000-3214816000 r-xp 00000000 01:00 31584 /lib64/libgcc_s-4.4.6-20120305.so.13214816000-3214a15000 ---p 00016000 01:00 31584 /lib64/libgcc_s-4.4.6-20120305.so.13214a15000-3214a16000 rw-p 00015000 01:00 31584 /lib64/libgcc_s-4.4.6-20120305.so.13215000000-3215016000 r-xp 00000000 01:00 16535 /lib64/libnsl-2.12.so3215016000-3215215000 ---p 00016000 01:00 16535 /lib64/libnsl-2.12.so3215215000-3215216000 r--p 00015000 01:00 16535 /lib64/libnsl-2.12.so3215216000-3215217000 rw-p 00016000 01:00 16535 /lib64/libnsl-2.12.so3215217000-3215219000 rw-p 00000000 00:00 03216c00000-3216c07000 r-xp 00000000 01:00 45267 /lib64/libcrypt-2.12.so3216c07000-3216e07000 ---p 00007000 01:00 45267 /lib64/libcrypt-2.12.so3216e07000-3216e08000 r--p 00007000 01:00 45267 /lib64/libcrypt-2.12.so3216e08000-3216e09000 rw-p 00008000 01:00 45267 /lib64/libcrypt-2.12.so3216e09000-3216e37000 rw-p 00000000 00:00 03217000000-321705d000 r-xp 00000000 01:00 23382 /lib64/libfreebl3.so321705d000-321725c000 ---p 0005d000 01:00 23382 /lib64/libfreebl3.so321725c000-321725d000 r--p 0005c000 01:00 23382 /lib64/libfreebl3.so321725d000-321725e000 rw-p 0005d000 01:00 23382 /lib64/libfreebl3.so321725e000-3217262000 rw-p 00000000 00:00 036c0e00000-36c0f73000 r-xp 00000000 01:00 23260 /usr/lib64/libcrypto.so.1.0.036c0f73000-36c1173000 ---p 00173000 01:00 23260 /usr/lib64/libcrypto.so.1.0.036c1173000-36c118c000 r--p 00173000 01:00 23260 /usr/lib64/libcrypto.so.1.0.036c118c000-36c1196000 rw-p 0018c000 01:00 23260 /usr/lib64/libcrypto.so.1.0.036c1196000-36c119a000 rw-p 00000000 00:00 07f2680000000-7f2680021000 rw-p 00000000 00:00 07f2680021000-7f2684000000 ---p 00000000 00:00 07f2684000000-7f2684051000 rw-p 00000000 00:00 07f2684051000-7f2688000000 ---p 00000000 00:00 07f2688000000-7f2688021000 rw-p 00000000 00:00 07f2688021000-7f268c000000 ---p 00000000 00:00 07f268c000000-7f268c021000 rw-p 00000000 00:00 07f268c021000-7f2690000000 ---p 00000000 00:00 07f2690000000-7f2690028000 rw-p 00000000 00:00 07f2690028000-7f2694000000 ---p 00000000 00:00 07f2694000000-7f2694050000 rw-p 00000000 00:00 07f2694050000-7f2698000000 ---p 00000000 00:00 07f2698000000-7f26980e6000 rw-p 00000000 00:00 07f26980e6000-7f269c000000 ---p 00000000 00:00 07f269c000000-7f269c0ee000 rw-p 00000000 00:00 07f269c0ee000-7f26a0000000 ---p 00000000 00:00 07f26a0000000-7f26a00e6000 rw-p 00000000 00:00 07f26a00e6000-7f26a4000000 ---p 00000000 00:00 07f26a4000000-7f26a40e4000 rw-p 00000000 00:00 07f26a40e4000-7f26a8000000 ---p 00000000 00:00 07f26a8000000-7f26a80e8000 rw-p 00000000 00:00 07f26a80e8000-7f26ac000000 ---p 00000000 00:00 07f26b0000000-7f26b00ef000 rw-p 00000000 00:00 07f26b00ef000-7f26b4000000 ---p 00000000 00:00 07f26b8000000-7f26b80e7000 rw-p 00000000 00:00 07f26b80e7000-7f26bc000000 ---p 00000000 00:00 07f26bd4fc000-7f26bd4fd000 ---p 00000000 00:00 07f26bd4fd000-7f26bdcfd000 rw-p 00000000 00:00 0 [stack:3069]7f26bdcfd000-7f26bdcfe000 ---p 00000000 00:00 07f26bdcfe000-7f26be4fe000 rw-p 00000000 00:00 0 [stack:18374]7f26be4fe000-7f26be4ff000 ---p 00000000 00:00 07f26be4ff000-7f26becff000 rw-p 00000000 00:00 0 [stack:25856]7f26becff000-7f26bed00000 ---p 00000000 00:00 07f26bed00000-7f26bf500000 rw-p 00000000 00:00 0 [stack:25294]7f26bf7ff000-7f26bf800000 ---p 00000000 00:00 07f26bf800000-7f26c0000000 rw-p 00000000 00:00 0......7f26cdd0e000-7f26ce5dd000 rw-p 00000000 00:00 0 [stack:25280]7f26ce5dd000-7f26ce5e9000 r-xp 00000000 01:00 6963 /lib64/libnss_files-2.12.so7f26ce5e9000-7f26ce7e9000 ---p 0000c000 01:00 6963 /lib64/libnss_files-2.12.so7f26ce7e9000-7f26ce7ea000 r--p 0000c000 01:00 6963 /lib64/libnss_files-2.12.so7f26ce7ea000-7f26ce7eb000 rw-p 0000d000 01:00 6963 /lib64/libnss_files-2.12.so7f26ce7eb000-7f26ce7f5000 r-xp 00000000 01:00 52110 /lib64/libnss_nis-2.12.so7f26ce7f5000-7f26ce9f4000 ---p 0000a000 01:00 52110 /lib64/libnss_nis-2.12.so7f26ce9f4000-7f26ce9f5000 r--p 00009000 01:00 52110 /lib64/libnss_nis-2.12.so7f26ce9f5000-7f26ce9f6000 rw-p 0000a000 01:00 52110 /lib64/libnss_nis-2.12.so7f26ce9f6000-7f26ce9fe000 r-xp 00000000 01:00 2862 /lib64/libnss_compat-2.12.so7f26ce9fe000-7f26cebfd000 ---p 00008000 01:00 2862 /lib64/libnss_compat-2.12.so7f26cebfd000-7f26cebfe000 r--p 00007000 01:00 2862 /lib64/libnss_compat-2.12.so7f26cebfe000-7f26cebff000 rw-p 00008000 01:00 2862 /lib64/libnss_compat-2.12.so7f26cebff000-7f26cec07000 rw-p 00000000 00:00 07f26cec08000-7f26cec0a000 rw-p 00000000 00:00 07f26cec0a000-7f26cec0b000 rw-s 00000000 00:04 24778850 /dev/zero (deleted)7f26cec0b000-7f26cec0c000 rw-p 00000000 00:00 07fffd60c6000-7fffd60ea000 rw-p 00000000 00:00 0 [stack]7fffd61ff000-7fffd6200000 r-xp 00000000 00:00 0 [vdso]ffffffffff600000-ffffffffff601000 r-xp 00000000 00:00 0 [vsyscall]第一列表示为 地址： 内存段的虚拟地址
第二列表示为 权限： 虚拟内存的权限， rwxsp（可读，可写，可执行，共享，私有）
第三列表示为 偏移量： 在进程地址里的偏移量
第四列表示为 设备： 映像文件的主设备号和次设备号
第五列表示为 节点： 映像文件的节点号（inode）
第六列表示为 路径： 映像文件的路径
6. /proc/$PID/smaps
/proc/$PID/maps 显示的是进程虚拟地址映射表的概况信息，/proc/$PID/smaps则是显示每个地址段的详细信息
36c118c000-36c1196000 rw-p 0018c000 01:00 23260 /usr/lib64/libcrypto.so.1.0.0Size: 40 kBRss: 8 kBPss: 4 kBShared_Clean: 0 kBShared_Dirty: 8 kBPrivate_Clean: 0 kBPrivate_Dirty: 0 kBReferenced: 0 kBAnonymous: 8 kBAnonHugePages: 0 kBSwap: 0 kBKernelPageSize: 4 kBMMUPageSize: 4 kBLocked: 0 kBVmFlags: rd wr mr mw me ac36c1196000-36c119a000 rw-p 00000000 00:00 0Size: 16 kBRss: 0 kBPss: 0 kBShared_Clean: 0 kBShared_Dirty: 0 kBPrivate_Clean: 0 kBPrivate_Dirty: 0 kBReferenced: 0 kBAnonymous: 0 kBAnonHugePages: 0 kBSwap: 0 kBKernelPageSize: 4 kBMMUPageSize: 4 kBLocked: 0 kBVmFlags: rd wr mr mw me ac7f2680000000-7f2680021000 rw-p 00000000 00:00 0Size: 132 kBRss: 44 kBPss: 44 kBShared_Clean: 0 kBShared_Dirty: 0 kBPrivate_Clean: 0 kBPrivate_Dirty: 44 kBReferenced: 44 kBAnonymous: 44 kBAnonHugePages: 0 kBSwap: 0 kBKernelPageSize: 4 kBMMUPageSize: 4 kBLocked: 0 kBVmFlags: rd wr mr mw me nr7f2680021000-7f2684000000 ---p 00000000 00:00 0Size: 65404 kBRss: 0 kBPss: 0 kBShared_Clean: 0 kBShared_Dirty: 0 kBPrivate_Clean: 0 kBPrivate_Dirty: 0 kBReferenced: 0 kBAnonymous: 0 kBAnonHugePages: 0 kBSwap: 0 kBKernelPageSize: 4 kBMMUPageSize: 4 kBLocked: 0 kBVmFlags: mr mw me nr7f2684000000-7f2684051000 rw-p 00000000 00:00 0Size: 324 kBRss: 156 kBPss: 156 kBShared_Clean: 0 kBShared_Dirty: 0 kBPrivate_Clean: 0 kBPrivate_Dirty: 156 kBReferenced: 156 kBAnonymous: 156 kBAnonHugePages: 0 kBSwap: 0 kBKernelPageSize: 4 kBMMUPageSize: 4 kBLocked: 0 kBVmFlags: rd wr mr mw me nr7f2684051000-7f2688000000 ---p 00000000 00:00 0Size: 65212 kBRss: 0 kBPss: 0 kBShared_Clean: 0 kBShared_Dirty: 0 kBPrivate_Clean: 0 kBPrivate_Dirty: 0 kBReferenced: 0 kBAnonymous: 0 kBAnonHugePages: 0 kBSwap: 0 kBKernelPageSize: 4 kBMMUPageSize: 4 kBLocked: 0 kBVmFlags: mr mw me nr......
