slabtop(1)

NAME

   slabtop - display kernel slab cache information in real time

SYNOPSIS

   slabtop [options]

DESCRIPTION

   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.

OPTIONS

   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.

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.

   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

COMMANDS

   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.

FILES

   /proc/slabinfo
          slab information

SEE ALSO

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

NOTES

   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.

AUTHORS

   Written by Chris Rivera and Robert Love.

   slabtop was inspired by Martin Bligh's perl script, vmtop.

REPORTING BUGS

   Please send bug reports to procps@freelists.org

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Free and Open Source Software