slabtop



SLABTOP(1)                    Linux User’s Manual                   SLABTOP(1)




NAME

       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.


       <SPACEBAR>
              Refresh the screen.

       Q      Quit the program.



FILES

       /proc/slabinfo -- slab information



SEE ALSO

       free(1), ps(1), top(1), vmstat(8)



NOTES

       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>.



Linux                             13 Sep 2003                       SLABTOP(1)

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