slabtop - display kernel slab cache information in real time
SYNOPSIS
slabtop [ options ]
DESCRIPTION
slabtop(1) displays detailed kernel slab cache information in real time. It displays a
listing of the top caches sorted by one of the listed sort criterias. It also
displays a statistics header filled with slab layer information.
OPTIONS
Normal invocation of
slabtop(1) does not require any options. The behavior, however, can be fine-tuned by
specifying one or more of the following flags:
--delay=n, -d n
Refresh the display every n seconds. By default,
slabtop(1) refreshes the display every three seconds. To exit the program, hit
q.
--sort=S, -s S
Sort by S, where S is one of the sort criteria.
--once, -o
Display the output once and then exit.
--version, -V
Display version information and exit.
--help
Display usage information and exit.
SORT CRITERIA
The following are valid sort criteria used to sort the individual slab caches
and thereby determine what are the "top" slab caches to display. The default
sort criteria is to sort by the number of objects ("o").
The sort criteria can also be changed while slabtop is running by pressing
the associated character.
a:
sort by number of active objects
b:
sort by objects per slab
c:
sort by cache size
l:
sort by number of slabs
v
sort by number of active slabs
n:
sort by name
o:
sort by number of objects
p:
sort by pages per slab
s:
sort by object size
u:
sort by cache utilization
COMMANDS
slabtop(1) accepts keyboard commands from the user during use. The following are
supported. In the case of letters, both cases are accepted.
Each of the valid sort characters are also accepted, to change the sort
routine. See the section
"SORT CRITERIA" .
Currently,
slabtop(1) requires a 2.4 or later kernel (specifically, a version 1.1 or later
/proc/slabinfo ). Kernel 2.2 should be supported in the future.
AUTHORS
Written by Chris Rivera and Robert Love.
slabtop(1) was inspired by Martin Bligh's perl script,
vmtop .
The procps package is maintained by Robert Love and was created by Michael
Johnson.
Send bug reports to <procps-list@redhat.com>.