1、程序資訊管理 獲取所有程序的PID >>> pids() [1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 15, 16, 17, 178, 179, 182, 184, 252, 253, 254, 255, 256, 473, 517, 518, 522, 523, 524, 531, 544, 568, 594, 627, 1650, 2189, 2190, 2191, 2217, 2683, 3031, 3426, 3471, 3473, 3495, 3498, 3508, 3519, 3546, 3547, 3554, 3578, 3593, 3662, 3672, 3685, 3686, 3694, 3702, 3712, 3749, 3774, 3779, 3792, 3801, 3815, 3877, 3933, 3955, 3963, 3982, 3996, 4077, 4094, 4124, 4125, 4196, 4202, 4204, 4206, 4207, 4208, 4216, 4217, 4315, 4317, 4318, 4342, 4344, 4358, 4391, 4398, 4431, 4432, 4438, 4439, 4443, 4445, 4466, 4467, 4469, 4471, 4475, 4477, 4481, 4483, 4485, 4489, 4497, 4524, 4533, 4535, 4537, 4540, 4541, 4547, 4549, 4552, 4558, 4573, 4593, 4599, 4600, 4601, 4638, 4640, 4642, 4657, 4731, 4752, 4769, 5316, 5429, 5535, 5537, 5539, 14908] 獲取單個程序的資訊（以PID為5537為例） >>> p = Process(5537) >>> p <psutil.Process(pid=5537, name='sh') at -1209176468> >>> p.name() 'sh' >>> p.exe() //獲取程序的bin路徑 '/bin/bash' >>> p.cwd() //獲取程序工作的絕對路徑 '/root' >>> p.status() //程序狀態 'sleeping' >>> p.create_time() //程序建立時間，以時間戳形式顯示 1512435331.8699999 >>> p.uid / p.gid //分別獲取程序uid和gid資訊 >>> p.cpu_affinity() //獲取程序cpu親和度 [0, 1] >>> p.memory_percent() //程序記憶體利用率 0.025554286948605991 >>> p.memory_info() //獲取程序記憶體rss、vms資訊 pmem(rss=10625024, vms=29462528) RSS

: "Resident Set Size", 實際駐留"在記憶體中"的記憶體數. 不包括已經交換出去的程式碼. 舉一個例子: 如果你有一個程式使用了100K記憶體, 作業系統交換出40K記憶體, 那麼RSS為60K. RSS還包括了與其它程序共享的記憶體區域. 這些區域通常用於libc庫等. RSS只有在程序使用CPU時才更新，如果程序idle了，就再也不會更新，永遠是那麼大。 RSS = sum of private region pages + (sum of shared region pages /        number of references)                                  The number of references is a count of the number of attachments to the memory region.  attachments, for shared regions, may come from several processes sharing the same memory, a single process with multiple attachments, or combinations of these. This value is only updated when a process uses CPU.Thus, under memory pressure, this value may be higher than the actual amount of resident memory for processes which are idle because their memory pages may no longer be resident or the reference count for shared segments may have changed. >>> p.io_counters() //獲取程序IO資訊，包括讀寫IO數及位元組數 pio(read_count=633, write_count=1083, read_bytes=0, write_bytes=0) >>> p.num_threads() //獲取程序開啟的程序數 1 2、popen類的使用

poepn類可以獲取使用者啟動的應用程式程序資訊，以跟蹤程式的執行狀態 >>> from psutil import * >>> from subprocess import PIPE //利用管道標準輸出 >>> p = Popen(["/usr/bin/python", "-c", "print('hello')"], stdout=PIPE) //將p進行例項化，然後就可以獲取這個程序的各種資訊 如： >>> p.name() 'python'