Wednesday, January 12, 2011
Linux process details
Here is the execution ps -ax in my 2.6 64 bit Linux. Here we try to explain what these processes are.
PID TTY STAT TIME COMMAND
1 ? Ss 0:00 init [5]
2 ? S< 0:00 [migration/0]
3 ? SN 0:00 [ksoftirqd/0]
4 ? S< 0:00 [watchdog/0]
5 ? S< 0:00 [migration/1]
6 ? SN 0:00 [ksoftirqd/1]
7 ? S< 0:00 [watchdog/1]
8 ? S< 0:00 [events/0]
9 ? S< 0:00 [events/1]
10 ? S< 0:00 [khelper]
27 ? S< 0:00 [kthread]
32 ? S< 0:00 [kblockd/0]
33 ? S< 0:00 [kblockd/1]
34 ? S< 0:00 [kacpid]
132 ? S< 0:00 [cqueue/0]
133 ? S< 0:00 [cqueue/1]
136 ? S< 0:00 [khubd]
138 ? S< 0:00 [kseriod]
210 ? S 0:00 [khungtaskd]
213 ? S< 0:10 [kswapd0]
214 ? S< 0:00 [aio/0]
215 ? S< 0:00 [aio/1]
364 ? S< 0:00 [kpsmoused]
396 ? S< 0:00 [ata/0]
397 ? S< 1:22 [ata/1]
398 ? S< 0:00 [ata_aux]
405 ? S< 0:00 [scsi_eh_0]
406 ? S< 3:52 [scsi_eh_1]
413 ? S< 0:00 [kstriped]
426 ? S< 0:00 [ksnapd]
441 ? S< 0:28 [kjournald]
474 ? S< 0:00 [kauditd]
516 ? S<s 0:00 /sbin/udevd -d
1577 ? S< 0:00 [hd-audio0]
1786 ? S< 0:00 [kmpathd/0]
1787 ? S< 0:00 [kmpathd/1]
1788 ? S< 0:00 [kmpath_handlerd]
1813 ? S< 0:00 [kjournald]
2007 ? S< 0:00 [kondemand/0]
2008 ? S< 0:00 [kondemand/1]
2025 ? S< 0:00 [iscsi_eh]
2069 ? S< 0:00 [ib_addr]
2079 ? S< 0:00 [ib_mcast]
2080 ? S< 0:00 [ib_inform]
2081 ? S< 0:00 [local_sa]
2085 ? S< 0:00 [iw_cm_wq]
2089 ? S< 0:00 [ib_cm/0]
2090 ? S< 0:00 [ib_cm/1]
2094 ? S< 0:00 [rdma_cm]
2112 ? Ssl 0:00 brcm_iscsiuio
2118 ? Ss 0:00 iscsid
2119 ? S<Ls 0:00 iscsid
2220 ? Ss 0:00 mcstransd
2502 ? Ss 0:02 /sbin/dhclient -1 -q -lf /var/lib/dhclient/dhclient-eth0.leases -pf /var/run/dhclient-eth0.pid eth0
2553 ? S<sl 0:00 auditd
2555 ? S<sl 0:00 /sbin/audispd
2567 ? S 0:02 stardict
2571 ? Ss 0:00 /usr/bin/esd -terminate -nobeeps -as 2 -spawnfd 24
2573 ? Ss 0:00 /usr/sbin/restorecond
2584 ? Ss 0:01 syslogd -m 0
2587 ? Ss 0:00 klogd -x
2623 ? Ss 0:00 portmap
2640 ? S 0:13 /usr/bin/python2.4 /usr/share/meld/meld
2648 ? Ss 0:00 rpc.statd
2674 pts/9 S+ 0:01 ssh rh8
2675 pts/10 S+ 0:01 ssh rh8
2682 ? S< 0:00 [rpciod/0]
2683 ? S< 0:00 [rpciod/1]
2690 ? Ss 0:00 rpc.idmapd
2709 ? Ssl 0:18 dbus-daemon --system
2721 ? Ss 0:00 /usr/sbin/hcid
2727 ? Ss 0:00 /usr/sbin/sdpd
2750 ? S< 0:00 [krfcommd]
2792 ? Ssl 0:01 pcscd
2808 ? Ss 0:00 /usr/bin/hidd --server
2827 ? Ssl 0:00 automount
2860 ? Ss 0:00 /usr/sbin/acpid
2871 ? Ss 0:00 ./hpiod
2876 ? S 0:00 python ./hpssd.py
2891 ? Ss 0:00 /usr/sbin/sshd
2902 ? Ss 0:00 cupsd
2916 ? SLs 0:00 ntpd -u ntp:ntp -p /var/run/ntpd.pid -g
2936 ? Ss 0:00 sendmail: accepting connections
2945 ? Ss 0:00 sendmail: Queue runner@01:00:00 for /var/spool/clientmqueue
2957 ? Ss 0:00 gpm -m /dev/input/mice -t exps2
2968 ? Ss 0:00 crond
3003 ? Ss 0:00 xfs -droppriv -daemon
init: created in the system start up which is used to monitor and manager all other processes
migration: ?
ksoftirqd: kernel threads to manage the softirq
watchdog: ?
events: predefine kernel threads to manage work queues
khelper:?
kthread:?
kblockd: special work queue management threads for block device
kacpid:
khubd:
kseriod:
khungtaskd:
kswapd: the kernel thread to mange the memory swap
aio
kpsmoused:
ata:
ata_aux:
scsi_eh_0:
kstriped
ksnapd
kjournald
kauditd
/sbin/udevd -d: event manage daemon to handle device management (udev)
hd-audio0
kmpathd
kmpath_handlerd
kondemand
iscsi_eh
ib_addr
ib_mcast
ib_inform
local_sa
iw_cm_wq
ib_cm
rdma_cm
cqueue:
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