The top program provides a dynamic real-time view of a running system. It can display system summary information as well as a list of
tasks currently being managed by the Linux kernel. The types of system summary information shown and the types, order and size of
information displayed for tasks are all user configurable and that configuration can be made persistent across restarts.
The program provides a limited interactive interface for process manipulation as well as a much more extensive interface for personal
configuration -- encompassing every aspect of its operation. And while top is referred to throughout this document, you are free to
name the program anything you wish. That new name, possibly an alias, will then be reflected on top's display and used when reading
and writing a configuration file.
usage: top -hv | -bcisSHM -d delay -n iterations [-u user | -U user] -p pid [,pid ...]
[root@www ~]# top
top - 21:04:32 up 20:32, 1 user, load average: 0.00, 0.00, 0.00
Tasks: 70 total, 1 running, 69 sleeping, 0 stopped, 0 zombie
Cpu(s): 0.0%us, 0.0%sy, 0.0%ni,100.0%id, 0.0%wa, 0.0%hi, 0.0%si, 0.0%st
Mem: 1033824k total, 1001380k used, 32444k free, 99592k buffers
Swap: 779144k total, 80k used, 779064k free, 760936k cached
PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
1 root 15 0 2060 624 532 S 0 0.1 0:00.75 init
2 root RT -5 0 0 0 S 0 0.0 0:00.04 migration/0
3 root 34 19 0 0 0 S 0 0.0 0:00.00 ksoftirqd/0
4 root RT -5 0 0 0 S 0 0.0 0:00.00 watchdog/0
5 root RT -5 0 0 0 S 0 0.0 0:00.04 migration/1
6 root 34 19 0 0 0 S 0 0.0 0:00.00 ksoftirqd/1
7 root RT -5 0 0 0 S 0 0.0 0:00.00 watchdog/1
8 root 10 -5 0 0 0 S 0 0.0 0:00.00 events/0
9 root 10 -5 0 0 0 S 0 0.0 0:00.00 events/1
10 root 10 -5 0 0 0 S 0 0.0 0:00.03 khelper
11 root 18 -5 0 0 0 S 0 0.0 0:00.00 kthread
15 root 10 -5 0 0 0 S 0 0.0 0:00.41 kblockd/0
16 root 16 -5 0 0 0 S 0 0.0 0:00.00 kblockd/1
17 root 14 -5 0 0 0 S 0 0.0 0:00.00 kacpid
109 root 14 -5 0 0 0 S 0 0.0 0:00.00 cqueue/0
110 root 15 -5 0 0 0 S 0 0.0 0:00.00 cqueue/1
113 root 10 -5 0 0 0 S 0 0.0 0:00.00 khubd
115 root 10 -5 0 0 0 S 0 0.0 0:00.00 kseriod
181 root 15 0 0 0 0 S 0 0.0 0:01.00 pdflush
182 root 15 0 0 0 0 S 0 0.0 0:01.88 pdflush
183 root 10 -5 0 0 0 S 0 0.0 0:01.98 kswapd0
184 root 15 -5 0 0 0 S 0 0.0 0:00.00 aio/0
185 root 15 -5 0 0 0 S 0 0.0 0:00.00 aio/1
350 root 13 -5 0 0 0 S 0 0.0 0:00.00 kpsmoused
380 root 14 -5 0 0 0 S 0 0.0 0:00.00 ata/0
381 root 14 -5 0 0 0 S 0 0.0 0:00.00 ata/1
382 root 14 -5 0 0 0 S 0 0.0 0:00.00 ata_aux
386 root 10 -5 0 0 0 S 0 0.0 0:00.00 scsi_eh_0
387 root 11 -5 0 0 0 S 0 0.0 0:00.00 scsi_eh_1
388 root 10 -5 0 0 0 S 0 0.0 0:05.78 kjournald
415 root 12 -5 0 0 0 S 0 0.0 0:00.00 kauditd
449 root 21 -4 2244 636 388 S 0 0.1 0:00.08 udevd
873 root 10 -5 0 0 0 S 0 0.0 0:00.00 kedac
1341 root 20 -5 0 0 0 S 0 0.0 0:00.00 kmpathd/0
1342 root 20 -5 0 0 0 S 0 0.0 0:00.00 kmpathd/1
1372 root 11 -5 0 0 0 S 0 0.0 0:00.00 kjournald
1766 root 15 0 1716 568 476 S 0 0.1 0:00.97 syslogd
1769 root 15 0 1668 396 332 S 0 0.0 0:00.00 klogd
1785 root 15 0 25928 4940 2932 S 0 0.5 0:00.14 snmpd
1807 root 17 0 6992 1048 668 S 0 0.1 0:00.57 sshd
1844 root 18 0 4500 1096 936 S 0 0.1 0:00.00 mysqld_safe
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