Running "top -b" on my SLES 11sp2 system produces the output below. The Cpu(s) line reports 33.7% CPU usage in user space, but if you add up the %CPU column in the process listing you only get 4.9% usage.
I've read answers to similar questions that say "top hides some processes, get htop to see them all". Installing htop is not an option in this customer environment, so I'm just looking to understand what it is that top might hide, why, and how to see all processes' CPU utilization using the default Linux toolset.
Thanks.
top - 09:43:53 up 22:23, 5 users, load average: 0.33, 0.08, 0.02
Tasks: 139 total, 6 running, 133 sleeping, 0 stopped, 0 zombie
Cpu(s): 33.7%us, 8.6%sy, 0.0%ni, 57.1%id, 0.3%wa, 0.0%hi, 0.3%si, 0.0%st
Mem: 2007648k total, 783040k used, 1224608k free, 158104k buffers
Swap: 2096440k total, 0k used, 2096440k free, 379820k cached
PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
2078 root 15 0 7760 4948 2508 S 2.0 0.2 0:00.06 python
1936 root 15 0 7528 4864 2436 S 0.7 0.2 0:00.08 python
2182 root 16 0 5120 2132 1732 S 0.7 0.1 0:00.02 ssh
2183 root 17 0 8592 2548 2056 S 0.3 0.1 0:00.01 sshd
2185 root 21 0 3704 1408 1172 R 0.3 0.1 0:00.01 bash
2201 root 16 0 5124 1968 1588 S 0.3 0.1 0:00.01 ssh
3574 root 34 19 0 0 0 R 0.3 0.0 0:01.34 kipmi0
3693 root 15 0 104m 1052 792 S 0.3 0.1 0:05.77 nscd
1 root 16 0 732 280 240 S 0.0 0.0 0:00.70 init
2 root 34 19 0 0 0 R 0.0 0.0 0:00.02 ksoftirqd/0
3 root 10 -5 0 0 0 S 0.0 0.0 0:00.02 events/0
4 root 10 -5 0 0 0 S 0.0 0.0 0:00.00 khelper
5 root 10 -5 0 0 0 S 0.0 0.0 0:00.00 kthread
8 root 10 -5 0 0 0 S 0.0 0.0 0:00.01 kblockd/0
9 root 20 -5 0 0 0 S 0.0 0.0 0:00.00 kacpid
10 root 20 -5 0 0 0 S 0.0 0.0 0:00.00 kacpi_notify
160 root 20 0 0 0 0 S 0.0 0.0 0:00.00 pdflush
161 root 15 0 0 0 0 S 0.0 0.0 0:00.07 pdflush
162 root 15 0 0 0 0 S 0.0 0.0 0:00.74 kswapd0
163 root 18 -5 0 0 0 S 0.0 0.0 0:00.00 aio/0
374 root 11 -5 0 0 0 S 0.0 0.0 0:00.00 cqueue/0
375 root 10 -5 0 0 0 S 0.0 0.0 0:00.00 kseriod
417 root 11 -5 0 0 0 S 0.0 0.0 0:00.00 kpsmoused
751 root 10 -5 0 0 0 S 0.0 0.0 0:03.11 ata/0
752 root 11 -5 0 0 0 S 0.0 0.0 0:00.00 ata_aux
765 root 10 -5 0 0 0 S 0.0 0.0 0:00.00 scsi_eh_0
766 root 10 -5 0 0 0 S 0.0 0.0 0:08.17 scsi_eh_1
771 root 10 -5 0 0 0 S 0.0 0.0 0:00.00 scsi_eh_2
772 root 10 -5 0 0 0 S 0.0 0.0 0:00.00 scsi_eh_3
854 root 15 0 0 0 0 S 0.0 0.0 0:00.55 kjournald
915 root 12 -4 2424 600 352 S 0.0 0.0 0:00.21 udevd
1516 root 10 -5 0 0 0 S 0.0 0.0 0:00.00 khubd
1531 root 16 0 2240 1040 764 R 0.0 0.1 0:00.04 top
1533 root 15 0 2056 584 516 S 0.0 0.0 0:00.00 mgetty
1928 root 15 0 0 0 0 S 0.0 0.0 0:00.00 kjournald
1967 root 11 -5 0 0 0 S 0.0 0.0 0:00.00 kauditd
2202 root 17 0 6436 1956 1596 R 0.0 0.1 0:00.00 sshd
2203 sshd 17 0 6436 1204 836 R 0.0 0.1 0:00.00 sshd
2298 root 15 0 2088 764 468 S 0.0 0.0 0:00.79 syslog-ng
2303 root 15 0 1704 520 320 S 0.0 0.0 0:00.14 klogd
2312 100 16 0 3500 972 736 S 0.0 0.0 0:00.09 dbus-daemon
2314 root 16 0 1572 500 416 S 0.0 0.0 0:00.00 acpid
2357 root 15 0 1864 664 536 S 0.0 0.0 0:00.00 resmgrd
2408 root 16 0 4704 3256 1444 S 0.0 0.2 0:00.58 hald
2649 root 20 0 1872 620 536 S 0.0 0.0 0:00.00 hald-addon-acpi
2810 root 16 0 1864 592 508 S 0.0 0.0 0:12.63 hald-addon-stor
3262 root 10 -5 0 0 0 S 0.0 0.0 0:00.00 bond0
3383 root 10 -5 0 0 0 S 0.0 0.0 0:00.00 bond1
3504 nobody 16 0 1608 424 328 S 0.0 0.0 0:00.00 portmap
3521 daemon 16 0 3288 896 636 S 0.0 0.0 0:00.00 slpd
3529 root 11 -5 0 0 0 S 0.0 0.0 0:00.00 rpciod/0
3530 root 15 0 0 0 0 S 0.0 0.0 0:00.00 lockd
3630 admin 18 0 2548 1104 852 S 0.0 0.1 0:00.00 su
3631 root 15 0 1628 412 348 S 0.0 0.0 0:00.00 startpar
3645 ntp 16 0 3968 1368 1064 S 0.0 0.1 0:00.02 ntpd
3661 admin 17 0 3908 1604 1292 S 0.0 0.1 0:00.02 bash
3674 root 16 0 1940 736 596 S 0.0 0.0 0:00.00 cron
3783 root 16 0 4336 1736 1388 S 0.0 0.1 0:00.01 powersaved
3820 root 15 0 5096 1136 796 S 0.0 0.1 0:02.49 sshd
3862 admin 16 0 15268 9.9m 1800 S 0.0 0.5 0:00.71 Xvnc
3865 root 16 0 4396 1056 804 S 0.0 0.1 0:00.01 ha_logd
3867 root 16 0 4396 932 680 S 0.0 0.0 0:00.00 ha_logd
3892 root 16 0 6708 2148 1148 S 0.0 0.1 0:00.03 snmptrapd
3928 admin 19 0 3704 1252 1044 S 0.0 0.1 0:00.00 xstartup
3933 admin 16 0 3712 1408 1152 S 0.0 0.1 0:00.02 kde
3935 root -2 0 12320 12m 4420 S 0.0 0.6 0:01.30 heartbeat
3958 root 16 0 20204 1860 1228 S 0.0 0.1 0:00.10 acpsnmpd
3961 nobody -2 0 5724 5724 4420 S 0.0 0.3 0:00.00 heartbeat
3962 nobody -2 0 5720 5720 4420 S 0.0 0.3 0:00.01 heartbeat
3963 nobody -2 0 5720 5720 4420 S 0.0 0.3 0:00.00 heartbeat
3964 nobody -2 0 5720 5720 4420 S 0.0 0.3 0:00.00 heartbeat
3965 nobody -2 0 5720 5720 4420 S 0.0 0.3 0:01.53 heartbeat
4008 admin 16 0 24328 7056 5864 S 0.0 0.4 0:00.04 kdeinit
4041 admin 15 0 23512 2632 1512 S 0.0 0.1 0:00.02 dcopserver
4154 admin 16 0 24048 7908 6652 S 0.0 0.4 0:00.02 klauncher
4172 admin 16 0 31584 14m 11m S 0.0 0.7 0:00.23 kded
4174 root 18 0 2008 668 588 S 0.0 0.0 0:00.01 mingetty
4175 root 18 0 2008 644 568 S 0.0 0.0 0:00.00 mingetty
4176 root 18 0 2012 648 568 S 0.0 0.0 0:00.00 mingetty
4177 root 18 0 2008 644 568 S 0.0 0.0 0:00.00 mingetty
4178 root 18 0 2012 648 568 S 0.0 0.0 0:00.00 mingetty
4179 root 18 0 2008 644 568 S 0.0 0.0 0:00.00 mingetty
4180 root 15 0 14444 4592 1952 S 0.0 0.2 0:00.13 python
4181 root 15 0 5556 3804 1896 S 0.0 0.2 0:00.61 python
4183 root 16 0 5840 4068 1908 S 0.0 0.2 0:00.07 python
4185 root 16 0 1568 492 424 S 0.0 0.0 0:00.00 agetty
4217 admin 25 0 3712 1364 1128 S 0.0 0.1 0:00.00 startx
4241 admin 17 0 2564 652 552 S 0.0 0.0 0:00.00 xinit
4242 root 16 0 30652 8696 5584 S 0.0 0.4 0:01.66 X
4270 admin 16 0 1552 356 288 S 0.0 0.0 0:00.00 kwrapper
4273 admin 16 0 26904 10m 8416 S 0.0 0.5 0:00.06 ksmserver
4283 admin 16 0 29152 12m 10m S 0.0 0.6 0:00.17 kwin
4328 admin 16 0 6924 4816 4168 S 0.0 0.2 0:00.03 vncviewer
4354 admin 16 0 29412 14m 12m S 0.0 0.7 0:00.23 kdesktop
4368 root 16 0 1684 556 420 S 0.0 0.0 0:00.00 inotifywait
4369 admin 15 0 30704 14m 11m S 0.0 0.7 0:00.20 kicker
4430 admin 16 0 24824 6560 5316 S 0.0 0.3 0:00.00 kio_file
4440 admin 16 0 27012 9m 8368 S 0.0 0.5 0:00.05 kaccess
4444 admin 16 0 27176 10m 8636 S 0.0 0.5 0:00.06 knotify
4453 admin 16 0 28040 11m 9420 S 0.0 0.6 0:00.09 klipper
5181 root 16 0 47340 5876 3500 S 0.0 0.3 0:00.07 httpd2-prefork
5184 wwwrun 16 0 47832 4940 2040 S 0.0 0.2 0:00.08 httpd2-prefork
5185 wwwrun 15 0 47592 4652 1984 S 0.0 0.2 0:00.12 httpd2-prefork
5186 wwwrun 16 0 47892 4844 1988 S 0.0 0.2 0:00.16 httpd2-prefork
5187 wwwrun 15 0 47592 4640 1984 S 0.0 0.2 0:00.10 httpd2-prefork
5188 wwwrun 16 0 47596 4660 1988 S 0.0 0.2 0:00.08 httpd2-prefork
5513 root 24 0 3424 940 720 S 0.0 0.0 0:00.00 vsftpd
9662 admin 16 0 27100 12m 10m S 0.0 0.6 0:00.13 kdesktop_lock
9663 admin 37 19 22020 10m 8864 S 0.0 0.5 0:00.10 kblankscrn.kss
16902 wwwrun 15 0 47740 4784 1984 S 0.0 0.2 0:00.10 httpd2-prefork
16912 nobody 20 0 3660 492 312 S 0.0 0.0 0:00.00 shellinaboxd
16913 nobody 20 0 3660 440 256 S 0.0 0.0 0:00.00 shellinaboxd
16918 wwwrun 16 0 47728 4836 2040 S 0.0 0.2 0:00.07 httpd2-prefork
17192 wwwrun 15 0 47592 4516 1988 S 0.0 0.2 0:00.01 httpd2-prefork
22897 root 30 15 10384 4788 2928 S 0.0 0.2 0:00.10 snmpd
23153 postgres 16 0 46384 5704 5376 S 0.0 0.3 0:00.34 postmaster
23157 postgres 15 0 46384 2196 1832 S 0.0 0.1 0:00.00 postmaster
23158 postgres 15 0 46384 904 568 S 0.0 0.0 0:00.00 postmaster
23159 postgres 16 0 46912 1900 1124 S 0.0 0.1 0:00.00 postmaster
23160 postgres 16 0 8120 996 552 S 0.0 0.0 0:00.00 postmaster
23348 root 15 0 8424 2464 1932 S 0.0 0.1 0:00.75 sshd
23529 root 16 0 5112 1564 1024 S 0.0 0.1 0:00.06 sftp-server
23873 wwwrun 16 0 47728 4756 1984 S 0.0 0.2 0:00.04 httpd2-prefork
23895 root 16 0 8644 2436 1948 S 0.0 0.1 0:00.74 sshd
23980 root 16 0 4188 1924 1412 S 0.0 0.1 0:00.08 bash
24531 root 16 0 8480 2428 1952 S 0.0 0.1 0:00.01 sshd
24536 root 15 0 4192 1924 1412 S 0.0 0.1 0:00.04 bash
24564 root 16 0 5124 2140 1728 S 0.0 0.1 0:00.01 ssh
27855 root 16 0 8480 2424 1948 S 0.0 0.1 0:00.02 sshd
27858 root 15 0 4188 1920 1408 S 0.0 0.1 0:00.05 bash
27886 man 17 0 2500 1344 796 S 0.0 0.1 0:00.12 man
27887 man 15 0 2808 1196 988 S 0.0 0.1 0:00.00 sh
27891 man 16 0 2224 912 728 S 0.0 0.0 0:00.01 less
31829 root 16 0 8656 2660 2056 S 0.0 0.1 0:00.14 sshd
31915 root 16 0 4188 1920 1408 S 0.0 0.1 0:00.06 bash
