Что означают VIRT, RES и SHR в высшем командовании?

Я узнавал о top команда. Есть некоторые термины, в которых я запутался. Мне нужны некоторые разъяснения.

screenshot with top

Каковы термины WA, HI, SI и ST в строке CPU(ов), а также VIRT, RES и SHR?

Это можно увидеть из man top в терминале как

ОПИСАНИЯ полей, перечисленных ниже, являются доступными полями top. Они всегда связаны с показанной буквой, независимо от позиции, которую вы, возможно, установили для них с помощью интерактивной команды "o" (Поля заказа).

    Any field is selectable as the sort field, and you control whether   they  are  sorted  high-to-low  or  low-to-high.   For  additional   information on sort provisions see topic 3c. TASK Area Commands.   a: PID  --  Process Id      The  task's unique process ID, which periodically wraps, though      never restarting at zero.   b: PPID  --  Parent Process Pid      The process ID of a task's parent.   c: RUSER  --  Real User Name      The real user name of the task's owner.   d: UID  --  User Id      The effective user ID of the task's owner.   e: USER  --  User Name      The effective user name of the task's owner.   f: GROUP  --  Group Name      The effective group name of the task's owner.   g: TTY  --  Controlling Tty      The name of the controlling  terminal.   This  is  usually  the      device  (serial  port,  pty,  etc.)  from which the process was      started, and which it uses for input  or  output.   However,  a      task  need  not  be  associated  with a terminal, in which case      you'll see '?' displayed.   h: PR  --  Priority      The priority of the task.   i: NI  --  Nice value      The nice value of the task.  A negative nice value means higher      priority,  whereas  a positive nice value means lower priority.      Zero in this field simply means priority will not  be  adjusted      in determining a task's dispatchability.   j: P  --  Last used CPU (SMP)      A  number  representing the last used processor.  In a true SMP      environment this will likely change frequently since the kernel      intentionally  uses  weak  affinity.   Also,  the  very  act of      running top  may  break  this  weak  affinity  and  cause  more      processes  to  change  CPUs  more  often  (because of the extra      demand for cpu time).   k: %CPU  --  CPU usage      The task's share of the elapsed CPU time since the last  screen      update, expressed as a percentage of total CPU time.  In a true      SMP environment, if 'Irix mode' is Off,  top  will  operate  in      'Solaris  mode' where a task's cpu usage will be divided by the      total number of CPUs.  You toggle 'Irix/Solaris' modes with the      'I' interactive command.   l: TIME  --  CPU Time      Total  CPU  time  the  task  has  used  since it started.  When      'Cumulative mode' is On, each process is listed  with  the  cpu      time  that  it  and  its  dead  children  has used.  You toggle      'Cumulative mode' with 'S', which is a command-line option  and      an  interactive  command.   See the 'S' interactive command for      additional information regarding this mode.   m: TIME+  --  CPU Time, hundredths      The same as 'TIME', but  reflecting  more  granularity  through      hundredths of a second.   n: %MEM  --  Memory usage (RES)      A task's currently used share of available physical memory.   o: VIRT  --  Virtual Image (kb)      The  total  amount  of  virtual  memory  used  by the task.  It      includes all code, data and shared libraries  plus  pages  that      have  been  swapped out and pages that have been mapped but not      used.   p: SWAP  --  Swapped size (kb)      Memory that is not resident but is present in a task.  This  is      memory  that  has been swapped out but could include additional      non-resident memory.  This column is calculated by  subtracting      physical memory from virtual memory.   q: RES  --  Resident size (kb)      The non-swapped physical memory a task has used.   r: CODE  --  Code size (kb)      The  amount  of virtual memory devoted to executable code, also      known as the 'text resident set' size or TRS.   s: DATA  --  Data+Stack size (kb)      The amount of virtual memory devoted to other  than  executable      code, also known as the 'data resident set' size or DRS.   t: SHR  --  Shared Mem size (kb)      The amount of shared memory used by a task.  It simply reflects      memory that could be potentially shared with other processes.   u: nFLT  --  Page Fault count      The number of major page faults that have occurred for a  task.      A  page  fault  occurs  when a process attempts to read from or      write to a virtual page that is not currently  present  in  its      address  space.   A  major  page  fault is when backing storage      access (such as  a  disk)  is  involved  in  making  that  page      available.   v: nDRT  --  Dirty Pages count      The  number  of  pages  that have been modified since they were      last written to disk.  Dirty pages  must  be  written  to  disk      before  the  corresponding physical memory location can be used      for some other virtual page.   w: S  --  Process Status      The status of the task which can be one of:         'D' = uninterruptible sleep         'R' = running         'S' = sleeping         'T' = traced or stopped         'Z' = zombie      Tasks shown as running should be more properly  thought  of  as      'ready  to run'  --  their task_struct is simply represented on      the Linux run-queue.  Even without a true SMP machine, you  may      see  numerous  tasks  in  this  state  depending on top's delay      interval and nice value.

Для центрального процессора

2с. Состояния процессора Состояния процессора отображаются в области сводки. Они всегда отображаются в процентах и относятся к времени между настоящим моментом и последним обновлением.

    us  --  User CPU time      The time the CPU has spent running users'  processes  that  are      not niced.    sy  --  System CPU time      The  time  the  CPU  has  spent  running  the  kernel  and  its      processes.    ni  --  Nice CPU time      The time the CPU has spent running users'  proccess  that  have      been niced.    wa  --  iowait      Amount of time the CPU has been waiting for I/O to complete.    hi  --  Hardware IRQ      The  amount  of  time  the  CPU  has  been  servicing  hardware      interrupts.    si  --  Software Interrupts      The  amount  of  time  the  CPU  has  been  servicing  software      interrupts.    st  --  Steal Time      The  amount  of  CPU  'stolen' from this virtual machine by the      hypervisor for other tasks (such  as  running  another  virtual      machine)