linux中top的秘密：top中按1键和F键的参数：按1键可以等到多个cpu的情况按F(f:当前状态，可以按相应的字母键做top的定制输出)后得参数：
对F键和f键的区别：
如果进入F键区可以做显示的排序，如果进入f键区的话则可以选择显示的多个项目:
* A: PID = Process Id //进程ID b: PPID = Parent Process Pid //父进程ID c: RUSER = Real user name //真正的(Real)所属用户名称 d: UID = User Id //用户ID e: USER = User Name //用户名称 f: GROUP = Group Name //组名称 g: TTY = Controlling Tty //控制 h: PR = Priority //优先权 i: NI = Nice value //优先级得值(负数代表较高的优先级,正数是较低的优先级.0标志改优先级的值是不会被调整的) j: #C = Last used cpu (SMP) //随后使用的cpu比率 k: %CPU = CPU usage //cpu使用比率 l: TIME = CPU Time //cpu占用时间 m: TIME+ = CPU Time, hundredths //cpu%比 n: %MEM = Memory usage (RES) //内存使用率 o: VIRT = Virtual Image (kb) //虚拟镜像(VIRT = SWAP + RES:所有进程使用的虚拟内存值,包括所有的代码,数据,共享库已经被swapped out的) p: SWAP = Swapped size (kb) //交换空间大小(所有虚拟内存中的镜像) q: RES = Resident size (kb) //已经使用了的常驻内存(Resident size):RES = CODE + DATA r: CODE = Code size (kb) //分配给执行代码的物理内存 s: DATA = Data+Stack size (kb) //data+stack:物理内存中非存放代码的空间,用于存放数据 t: SHR = Shared Mem size (kb) //共享内存大小.放映了一个task的潜在可以供别人使用的内存的大小 u: nFLT = Page Fault count //内存叶错误的数量 v: nDRT = Dirty Pages count //脏页的数量 w: S = Process Status //进程状态:( R )为运行或可执行的,( S )为该程序正在睡眠中,( T )正在侦测或者是停止了,( Z )僵尸程序 x: COMMAND = Command name/line //进程启动命令行参数 y: WCHAN = Sleeping in Function //在睡眠中 z: Flags = Task Flags <sched.h> //任务标志
Note1:If a selected sort field can’t be shown due to screen width or your field order, the ‘<‘ and ‘>’ keys will be unavailable until a field within viewable range is chosen. Note2: Field sorting uses internal values, not those in column display. Thus, the TTY & WCHAN fields will violate strict ASCII collating sequence. (shame on you if WCHAN is chosen) * A: PID = Process Id * E: USER = User Name * H: PR = Priority * I: NI = Nice value * O: VIRT = Virtual Image (kb) * Q: RES = Resident size (kb) * T: SHR = Shared Mem size (kb) * W: S = Process Status * K: %CPU = CPU usage * N: %MEM = Memory usage (RES) * M: TIME+ = CPU Time, hundredths b: PPID = Parent Process Pid c: RUSER = Real user name d: UID = User Id f: GROUP = Group Name g: TTY = Controlling Tty j: #C = Last used cpu (SMP) p: SWAP = Swapped size (kb) l: TIME = CPU Time r: CODE = Code size (kb) s: DATA = Data+Stack size (kb) u: nFLT = Page Fault count v: nDRT = Dirty Pages count y: WCHAN = Sleeping in Function z: Flags = Task Flags <sched.h>* X: COMMAND = Command name/line
Flags field:
0x00000001 PF_ALIGNWARN 0x00000002 PF_STARTING 0x00000004 PF_EXITING 0x00000040 PF_FORKNOEXEC 0x00000100 PF_SUPERPRIV 0x00000200 PF_DUMPCORE 0x00000400 PF_SIGNALED 0x00000800 PF_MEMALLOC 0x00002000 PF_FREE_PAGES (2.5) 0x00008000 debug flag (2.5) 0x00024000 special threads (2.5) 0x001D0000 special states (2.5) 0x00100000 PF_USEDFPU (thru 2.4)
不做任何解释。没有人明白，
