slabtop(1)

1SLABTOP(1)                    Linux User's Manual                   SLABTOP(1)
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NAME

6       slabtop - display kernel slab cache information in real time
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SYNOPSIS

10       slabtop [ options ]
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DESCRIPTION

14       slabtop(1)  displays  detailed  kernel  slab  cache information in real
15       time.  It displays a listing of the top caches sorted  by  one  of  the
16       listed sort criteria.  It also displays a statistics header filled with
17       slab layer information.
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OPTIONS

21       Normal invocation of slabtop(1) does  not  require  any  options.   The
22       behavior,  however,  can be fine-tuned by specifying one or more of the
23       following flags:
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25       --delay=n, -d n
26              Refresh the display every n  seconds.   By  default,  slabtop(1)
27              refreshes the display every three seconds.  To exit the program,
28              hit q.
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30       --sort=S, -s S
31              Sort by S, where S is one of the sort criteria.
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33       --once, -o
34              Display the output once and then exit.
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36       --version, -V
37              Display version information and exit.
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39       --help Display usage information and exit.
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SORT CRITERIA

43       The following are valid sort criteria used to sort the individual  slab
44       caches and thereby determine what are the "top" slab caches to display.
45       The default sort criteria is to sort by the number of objects ("o").
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47       The sort criteria can also be  changed  while  slabtop  is  running  by
48       pressing the associated character.
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50       a:     sort by number of active objects
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52       b:     sort by objects per slab
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54       c:     sort by cache size
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56       l:     sort by number of slabs
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58       v      sort by number of active slabs
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60       n:     sort by name
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62       o:     sort by number of objects
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64       p:     sort by pages per slab
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66       s:     sort by object size
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68       u:     sort by cache utilization
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COMMANDS

72       slabtop(1)  accepts  keyboard  commands  from the user during use.  The
73       following are supported.  In  the  case  of  letters,  both  cases  are
74       accepted.
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76       Each of the valid sort characters are also accepted, to change the sort
77       routine. See the section SORT CRITERIA.
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80       <SPACEBAR>
81              Refresh the screen.
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83       Q      Quit the program.
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FILES

87       /proc/slabinfo -- slab information
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NOTES

95       Currently, slabtop(1) requires a 2.4 or later kernel  (specifically,  a
96       version  1.1  or later /proc/slabinfo).  Kernel 2.2 should be supported
97       in the future.
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99       The slabtop statistic header is tracking how many bytes  of  slabs  are
100       being used and it not a measure of physical memory. The 'Slab' field in
101       the /proc/meminfo file is tracking information about used slab physical
102       memory.
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AUTHORS

106       Written by Chris Rivera and Robert Love.
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108       slabtop(1)  was  inspired  by  Martin  Bligh's perl script, vmtop.  The
109       procps package is maintained by Albert Cahalan <albert@users.sf.net>.
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111       Please send bug reports to <procps-feedback@lists.sf.net>.
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115Linux                             13 Sep 2003                       SLABTOP(1)