SLABTOP(1) User Commands 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 list‐ ing of the top caches sorted by one of the listed sort criteria. It also displays a sta‐ tistics 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.
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 ⟨firstname.lastname@example.org⟩ procps-ng June 2011 SLABTOP(1)
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