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NAME | SYNOPSIS | DESCRIPTION | OPTIONS | SORT CRITERIA | COMMANDS | FILES | SEE ALSO | NOTES | AUTHORS | REPORTING BUGS | COLOPHON |
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SLABTOP(1) User Commands SLABTOP(1)
slabtop - display kernel slab cache information in real time
slabtop [options]
slabtop 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 does not require any options. The
behavior, however, can be fine-tuned by specifying one or more of the
following flags:
-d, --delay=N
Refresh the display every n in seconds. By default, slabtop
refreshes the display every three seconds. To exit the
program, hit q.
-s, --sort=S
Sort by S, where S is one of the sort criteria.
-o, --once
Display the output once and then exit.
-V, --version
Display version information and exit.
-h, --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.
character description header
a number of active objects ACTIVE
b objects per slab OBJ/SLAB
c cache size CACHE SIZE
l number of slabs SLABS
v number of active slabs N/A
n name NAME
o number of objects OBJS
p pages per slab N/A
s object size OBJ SIZE
u cache utilization USE
slabtop 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 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.
The slabtop statistic header is tracking how many bytes of slabs are
being used and is not a measure of physical memory. The 'Slab' field
in the /proc/meminfo file is tracking information about used slab
physical memory.
Written by Chris Rivera and Robert Love.
slabtop was inspired by Martin Bligh's perl script, vmtop.
Please send bug reports to ⟨procps@freelists.org⟩
This page is part of the procps-ng (/proc filesystem utilities)
project. Information about the project can be found at
⟨https://gitlab.com/procps-ng/procps⟩. If you have a bug report for
this manual page, see
⟨https://gitlab.com/procps-ng/procps/blob/master/Documentation/bugs.md⟩.
This page was obtained from the project's upstream Git repository
⟨https://gitlab.com/procps-ng/procps.git⟩ on 2018-02-02. (At that
time, the date of the most recent commit that was found in the repos‐
itory was 2018-01-13.) If you discover any rendering problems in
this HTML version of the page, or you believe there is a better or
more up-to-date source for the page, or you have corrections or
improvements to the information in this COLOPHON (which is not part
of the original manual page), send a mail to man-pages@man7.org
procps-ng June 2011 SLABTOP(1)
Pages that refer to this page: free(1), top(1), slabinfo(5)
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