SLABTOP(1) manual page
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slabtop - display kernel slab cache information in real time
slabtop
[ options ]
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 criteria. It also displays a statistics header
filled with slab layer information.
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.
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
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.
- <SPACEBAR>
- Refresh the screen.
- Q
- Quit the program.
/proc/slabinfo -- slab
information
free(1)
, ps(1)
, top(1)
, vmstat(8)
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.
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>.
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