linux 进程信息笔记（/proc/[pid]/）
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文章目录
前提
以hikflow_demo为例（在命令行下而非在海康容器里），我们查看它启动后的进程信息包含哪些
信息位置在/proc/[pid]/
实操
ps查看进程号为6231
cd /proc/6231/
ls -lah
# ls -lah
dr-xr-xr-x 8 admin root 0 May 18 00:33 .
dr-xr-xr-x 137 admin root 0 Jan 1 1970 ..
-r-------- 1 admin root 0 May 18 00:38 auxv
-r--r--r-- 1 admin root 0 May 18 00:38 cgroup
--w------- 1 admin root 0 May 18 00:38 clear_refs
-r--r--r-- 1 admin root 0 May 18 00:33 cmdline
-rw-r--r-- 1 admin root 0 May 18 00:38 comm
-rw-r--r-- 1 admin root 0 May 18 00:38 coredump_filter
-r--r--r-- 1 admin root 0 May 18 00:38 cpuset
lrwxrwxrwx 1 admin root 0 May 18 00:38 cwd -> /heop/package/ky_ai/opdevsdkDemo (deleted)
-r-------- 1 admin root 0 May 18 00:38 environ
lrwxrwxrwx 1 admin root 0 May 18 00:38 exe -> /heop/package/ky_ai/opdevsdkDemo/hikflow_demo_h7
dr-x------ 2 admin root 0 May 18 00:33 fd
dr-x------ 2 admin root 0 May 18 00:38 fdinfo
-rw-r--r-- 1 admin root 0 May 18 00:38 gid_map
-r--r--r-- 1 admin root 0 May 18 00:38 limits
dr-x------ 2 admin root 0 May 18 00:38 map_files
-r--r--r-- 1 admin root 0 May 18 00:38 maps
-rw------- 1 admin root 0 May 18 00:38 mem
-r--r--r-- 1 admin root 0 May 18 00:38 mountinfo
-r--r--r-- 1 admin root 0 May 18 00:38 mounts
-r-------- 1 admin root 0 May 18 00:38 mountstats
dr-xr-xr-x 8 admin root 0 May 18 00:38 net
dr-x--x--x 2 admin root 0 May 18 00:38 ns
-rw-r--r-- 1 admin root 0 May 18 00:38 oom_adj
-r--r--r-- 1 admin root 0 May 18 00:38 oom_score
-rw-r--r-- 1 admin root 0 May 18 00:38 oom_score_adj
-r-------- 1 admin root 0 May 18 00:38 pagemap
-r-------- 1 admin root 0 May 18 00:38 personality
-rw-r--r-- 1 admin root 0 May 18 00:38 projid_map
lrwxrwxrwx 1 admin root 0 May 18 00:38 root -> /
-rw-r--r-- 1 admin root 0 May 18 00:38 sched
-rw-r--r-- 1 admin root 0 May 18 00:38 setgroups
-r--r--r-- 1 admin root 0 May 18 00:38 smaps
-r-------- 1 admin root 0 May 18 00:38 stack
-r--r--r-- 1 admin root 0 May 18 00:33 stat
-r--r--r-- 1 admin root 0 May 18 00:38 statm
-r--r--r-- 1 admin root 0 May 18 00:38 status
-r-------- 1 admin root 0 May 18 00:38 syscall
dr-xr-xr-x 11 admin root 0 May 18 00:38 task
-rw-rw-rw- 1 admin root 0 May 18 00:38 timerslack_ns
-rw-r--r-- 1 admin root 0 May 18 00:38 uid_map
-r--r--r-- 1 admin root 0 May 18 00:38 wchan
#
我们一个个来看
# cat auxv
!殿d4 r
э옟ʏ졠Xshell
-sh: Xshell: not found
#
# cat cgroup
1:cpuset,cpu,memory,devices:/
#
# cat cmdline
/heop/package/ky_ai/opdevsdkDemo/hikflow_demo_h7/heop/package/ky_ai/opdevsdkDemo/model/config_yolov3_tiny_pytorch_facedetection2.txtYUV#
#
# cat comm
hikflow_demo_h7
#
# cat coredump_filter
00000033
#
# cat cpuset
/
#
# cat environ
SSH_CLIENT=192.168.1.178 50682 22USER=adminLD_LIBRARY_PATH=/lib:/usr/libSHLVL=1OLDPWD=/procHOME=/SSH_TTY=/dev/pts/3DBUS_SESSION_BUS_ADDRESS=unix:path=/lib/heop_bus_socketLOGNAME=adminTERM=xtermPATH=.:/bin:/usr/bin:/dav:/sbin:/usr/sbinSHELL=/bin/shPWD=/heop/package/ky_ai/opdevsdkDemoSSH_CONNECTION=192.168.1.178 50682 192.168.1.69 22#
#
# cd fd
# ls -lah
dr-x------ 2 admin root 0 May 18 00:33 .
dr-xr-xr-x 8 admin root 0 May 18 00:33 ..
lrwx------ 1 admin root 64 May 18 00:33 0 -> /dev/pts/3
lrwx------ 1 admin root 64 May 18 00:33 1 -> /dev/pts/3
lrwx------ 1 admin root 64 May 18 00:33 10 -> /dev/vgs
lrwx------ 1 admin root 64 May 18 00:47 11 -> socket:[133472]
lrwx------ 1 admin root 64 May 18 00:33 2 -> /dev/pts/3
lrwx------ 1 admin root 64 May 18 00:33 3 -> /dev/sys
lrwx------ 1 admin root 64 May 18 00:33 4 -> /dev/mmz_userdev
lrwx------ 1 admin root 64 May 18 00:33 5 -> /dev/hi_tde
lrwx------ 1 admin root 64 May 18 00:33 6 -> socket:[133243]
lr-x------ 1 admin root 64 May 18 00:33 7 -> /dev/dsp
lrwx------ 1 admin root 64 May 18 00:33 8 -> socket:[133246]
lr-x------ 1 admin root 64 May 18 00:33 9 -> /dev/nnie
#
# cd ../fdinfo/
# ls -lh
-r-------- 1 admin root 0 May 18 00:49 0
-r-------- 1 admin root 0 May 18 00:49 1
-r-------- 1 admin root 0 May 18 00:49 10
-r-------- 1 admin root 0 May 18 00:49 11
-r-------- 1 admin root 0 May 18 00:49 2
-r-------- 1 admin root 0 May 18 00:49 3
-r-------- 1 admin root 0 May 18 00:49 4
-r-------- 1 admin root 0 May 18 00:49 5
-r-------- 1 admin root 0 May 18 00:49 6
-r-------- 1 admin root 0 May 18 00:49 7
-r-------- 1 admin root 0 May 18 00:49 8
-r-------- 1 admin root 0 May 18 00:49 9
#
#
# cd ..
#
# cat gid_map
0 0 4294967295
#
# cat limits
Limit Soft Limit Hard Limit Units
Max cpu time unlimited unlimited seconds
Max file size unlimited unlimited bytes
Max data size unlimited unlimited bytes
Max stack size 8388608 unlimited bytes
Max core file size 0 0 bytes
Max resident set unlimited unlimited bytes
Max processes 3406 3406 processes
Max open files 1024 4096 files
Max locked memory 65536 65536 bytes
Max address space unlimited unlimited bytes
Max file locks unlimited unlimited locks
Max pending signals 3406 3406 signals
Max msgqueue size 819200 819200 bytes
Max nice priority 0 0
Max realtime priority 0 0
Max realtime timeout unlimited unlimited us
#
#
#
# cd map_files/
# ls -lh
lr-------- 1 admin root 64 May 18 00:55 10000-1fc000 -> /heop/package/ky_ai/opdevsdkDemo/hikflow_demo_h7
lr-------- 1 admin root 64 May 18 00:55 20b000-20c000 -> /heop/package/ky_ai/opdevsdkDemo/hikflow_demo_h7
lr-------- 1 admin root 64 May 18 00:55 20c000-212000 -> /heop/package/ky_ai/opdevsdkDemo/hikflow_demo_h7
lrw------- 1 admin root 64 May 18 00:55 aff58000-affee000 -> /dev/mmz_userdev
lrw------- 1 admin root 64 May 18 00:55 affee000-b0084000 -> /dev/mmz_userdev
lrw------- 1 admin root 64 May 18 00:55 b0084000-b011a000 -> /dev/mmz_userdev
lrw------- 1 admin root 64 May 18 00:55 b011a000-b01b0000 -> /dev/mmz_userdev
lrw------- 1 admin root 64 May 18 00:55 b01b0000-b04a8000 -> /dev/mmz_userdev
lrw------- 1 admin root 64 May 18 00:55 b04a8000-b0d06000 -> /dev/mmz_userdev
lrw------- 1 admin root 64 May 18 00:55 b0d06000-b219c000 -> /dev/mmz_userdev
lrw------- 1 admin root 64 May 18 00:55 b219c000-b29ce000 -> /dev/mmz_userdev
lrw------- 1 admin root 64 May 18 00:55 b2a4e000-b2ae4000 -> /dev/mmz_userdev
lrw------- 1 admin root 64 May 18 00:55 b2ae4000-b2b7a000 -> /dev/mmz_userdev
lrw------- 1 admin root 64 May 18 00:55 b2b7a000-b2c10000 -> /dev/mmz_userdev
lrw------- 1 admin root 64 May 18 00:55 b2c10000-b2f08000 -> /dev/mmz_userdev
lrw------- 1 admin root 64 May 18 00:55 b2f08000-b3200000 -> /dev/mmz_userdev
lrw------- 1 admin root 64 May 18 00:55 b356a000-b3600000 -> /dev/mmz_userdev
lrw------- 1 admin root 64 May 18 00:55 b4161000-b41c0000 -> /dev/mmz_userdev
lr-------- 1 admin root 64 May 18 00:55 b4a40000-b4a41000 -> /lib/libbproxy.so
lr-------- 1 admin root 64 May 18 00:55 b4a41000-b4a51000 -> /lib/libbproxy.so
lr-------- 1 admin root 64 May 18 00:55 b4a51000-b4a52000 -> /lib/libbproxy.so
lr-------- 1 admin root 64 May 18 00:55 b4a52000-b4a53000 -> /lib/libbproxy.so
lrw------- 1 admin root 64 May 18 00:55 b4c53000-b5048000 -> /dev/mmz_userdev
lrw------- 1 admin root 64 May 18 00:55 b5048000-b5831000 -> /dev/mmz_userdev
lrw------- 1 admin root 64 May 18 00:55 b5831000-b6804000 -> /dev/mmz_userdev
lrw------- 1 admin root 64 May 18 00:55 b6804000-b6a04000 -> /SYSV6a020e6c (deleted)
lrw------- 1 admin root 64 May 18 00:55 b6a04000-b6c04000 -> /SYSV6a020e6c (deleted)
lr-------- 1 admin root 64 May 18 00:55 b6c04000-b6c20000 -> /lib/libgcc_s.so.1
lr-------- 1 admin root 64 May 18 00:55 b6c20000-b6c2f000 -> /lib/libgcc_s.so.1
lr-------- 1 admin root 64 May 18 00:55 b6c2f000-b6c30000 -> /lib/libgcc_s.so.1
lr-------- 1 admin root 64 May 18 00:55 b6c30000-b6c31000 -> /lib/libgcc_s.so.1
lr-------- 1 admin root 64 May 18 00:55 b6c31000-b6d5e000 -> /lib/libc-2.24.so
lr-------- 1 admin root 64 May 18 00:55 b6d5e000-b6d6e000 -> /lib/libc-2.24.so
lr-------- 1 admin root 64 May 18 00:55 b6d6e000-b6d70000 -> /lib/libc-2.24.so
lr-------- 1 admin root 64 May 18 00:55 b6d70000-b6d71000 -> /lib/libc-2.24.so
lr-------- 1 admin root 64 May 18 00:55 b6d74000-b6ea1000 -> /lib/libstdc++.so.6.0.23
lr-------- 1 admin root 64 May 18 00:55 b6ea1000Linux下进程信息/proc/pid/status文件深入分析
linux下用程序读取某进程的状态信息（/proc/[pid]/stat）时，该进程结束了。怎么办