1，统计进程数量

#1, 统计所有进程数量
test2:/root #  ps -ef |wc -l
444#2, 统计root进程数量
test2:/root #  ps -U root -u root -f  |wc -l
184#3, 统计非root进程数量
test2:/root #  ps -U root -u root -f -N |wc -l
261#4，验证数量是否一致：总数量=root + 非root
test2:/root # python
Python 2.7.5 (default, Jul 13 2018, 13:06:57) 
[GCC 4.8.5 20150623 (Red Hat 4.8.5-28)] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> 184+261
445
>>> 

2，统计各进程的线程数量

#1， 查看进程pid及对应的线程tid
test2:/root # ps -eL -o pid,tid,user,cmd 
32173 32173 gitlab-+ postgres: gitlab gitlabhq_production [local] idle
32174 32174 gitlab-+ postgres: gitlab gitlabhq_production [local] idletest2:/root # ps -wwL 11240PID   LWP TTY      STAT   TIME COMMAND
11240 11240 ?        Sl     0:00 puma: cluster worker 10: 824 [gitlab-puma-worker]
11240 11242 ?        Sl     0:00 puma: cluster worker 10: 824 [gitlab-puma-worker]
11240 11408 ?        Sl     0:15 puma: cluster worker 10: 824 [gitlab-puma-worker]
11240 11410 ?        Sl     1:13 puma: cluster worker 10: 824 [gitlab-puma-worker]# 2, 统计各进程pid对应的线程数量
test2:/root # ps -eL -o pid,tid,user,cmd |grep gitlab |awk '{x[$1] ++ } END{for (i in x ) print( i " " x[i] )}' |sort -nk2
13054 9
13304 15
13645 18
11230 42
11240 42