查看进程及子进程：
ps -lax查看进程，以及父进程。找到自己需要查看的进程的pid，然后
ps --ppid ****
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ps -ef |grep进程名
ps -aux |grep 进程名
ps --ppid xxxx
ps -lax
top
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得到进程的pid： ps -ef | grep process_name | grep -v "grep" | awk '{print $2}'
查看进程的所有线程 # ps mp 6648 -o THREAD,tid USER %CPU PRI SCNT WCHAN USER SYSTEM TID root 0.0 - - - - - - root 0.0 24 - - - - 6648 root 0.0 21 - - - - 6650 root 1.0 24 - - - - 14214 root 0.0 23 - futex_ - - 14216 root 0.0 22 - 184466 - - 15374 root 0.0 23 - 184466 - - 15376 root 0.0 23 - 184466 - - 15378 root 0.0 23 - 184466 - - 15380 root 0.0 23 - 184466 - - 15392 root 0.0 23 - 184466 - - 15394 root 0.0 23 - 184466 - - 15398
查看所有子进程： # pstree -p 6648 agent_executor(6648)─┬─tar(15601)───gzip(15607) ├─{agent_executor}(6650) ├─{agent_executor}(14214) ├─{agent_executor}(14216) ├─{agent_executor}(15374) ├─{agent_executor}(15376) ├─{agent_executor}(15378) ├─{agent_executor}(15380) ├─{agent_executor}(15392) ├─{agent_executor}(15394) └─{agent_executor}(15398)
查看/proc/pid/status可以看到一些进程的当前状态：
Name: bash State: S (sleeping) SleepAVG: 98% Tgid: 11237 Pid: 11237 PPid: 11235 TracerPid: 0 Uid: 0 0 0 0 Gid: 0 0 0 0 FDSize: 256 Groups: 0 1 2 3 4 6 10 VmPeak: 66260 kB VmSize: 66228 kB VmLck: 0 kB VmHWM: 1684 kB VmRSS: 1684 kB VmData: 456 kB VmStk: 88 kB VmExe: 712 kB VmLib: 1508 kB VmPTE: 68 kB StaBrk: 008c3000 kB Brk: 011b1000 kB StaStk: 7fff8b728170 kB Threads: 1 SigQ: 1/30222 SigPnd: 0000000000000000 ShdPnd: 0000000000000000 SigBlk: 0000000000010000 SigIgn: 0000000000384004 SigCgt: 000000004b813efb CapInh: 0000000000000000 CapPrm: 00000000fffffeff CapEff: 00000000fffffeff Cpus_allowed: 00000000,00000000,00000000,00000000,00000000,00000000,00000000,00000003 Mems_allowed: 1
系统性能：top -d 1 -p **id -b > a.txt
vmstat 1