linux中top的隐含参数秘密

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       //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
* 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)