{ "content": [ { "type": "text", "text": "# slabtop (man)\n\n## NAME\n\nslabtop - display kernel slab cache information in real time\n\n## SYNOPSIS\n\nslabtop [options]\n\n## DESCRIPTION\n\nslabtop displays detailed kernel slab cache information in real time. It displays a listing\nof the top caches sorted by one of the listed sort criteria. It also displays a statistics\nheader filled with slab layer information.\n\n## TLDR\n\n> Display kernel slab cache information in real time.\n\n- Start `slabtop`:\n `sudo slabtop`\n- Sort by [c]ache size:\n `sudo slabtop {{-s|--sort}} c`\n- Sort by number of [o]bjects:\n `sudo slabtop {{-s|--sort}} o`\n- Sort by object [s]ize:\n `sudo slabtop {{-s|--sort}} s`\n- Display once and then exit:\n `sudo slabtop {{-o|--once}}`\n- Display help:\n `slabtop {{-h|--help}}`\n\n*Source: tldr-pages*\n\n## Sections\n\n- **NAME**\n- **SYNOPSIS**\n- **DESCRIPTION**\n- **OPTIONS** (5 subsections)\n- **SORT CRITERIA** (1 subsections)\n- **COMMANDS** (1 subsections)\n- **FILES**\n- **SEE ALSO**\n- **NOTES**\n- **AUTHORS**\n- **REPORTING BUGS**\n\nUse structuredContent.sections for detailed options, examples, and full documentation.\n" } ], "structuredContent": { "command": "slabtop", "section": "", "mode": "man", "summary": "slabtop - display kernel slab cache information in real time", "synopsis": "slabtop [options]", "tldr_summary": "Display kernel slab cache information in real time.", "tldr_examples": [ { "description": "Start `slabtop`", "command": "sudo slabtop" }, { "description": "Sort by [c]ache size", "command": "sudo slabtop {{-s|--sort}} c" }, { "description": "Sort by number of [o]bjects", "command": "sudo slabtop {{-s|--sort}} o" }, { "description": "Sort by object [s]ize", "command": "sudo slabtop {{-s|--sort}} s" }, { "description": "Display once and then exit", "command": "sudo slabtop {{-o|--once}}" }, { "description": "Display help", "command": "slabtop {{-h|--help}}" } ], "tldr_source": "official", "flags": [ { "flag": "-d", "long": "--delay", "arg": null, "description": "Refresh the display every n in seconds. By default, slabtop refreshes the display every three seconds. To exit the program, hit q. This cannot be combined with the -o option." }, { "flag": "-s", "long": "--sort", "arg": null, "description": "Sort by S, where S is one of the sort criteria." }, { "flag": "-o", "long": "--once", "arg": null, "description": "Display the output once and then exit." }, { "flag": "-V", "long": "--version", "arg": null, "description": "Display version information and exit." }, { "flag": "-h", "long": "--help", "arg": null, "description": "Display usage information and exit." } ], "examples": [], "see_also": [ { "name": "free", "section": "1", "url": "https://www.chedong.com/phpMan.php/man/free/1/json" }, { "name": "ps", "section": "1", "url": "https://www.chedong.com/phpMan.php/man/ps/1/json" }, { "name": "top", "section": "1", "url": "https://www.chedong.com/phpMan.php/man/top/1/json" }, { "name": "vmstat", "section": "8", "url": "https://www.chedong.com/phpMan.php/man/vmstat/8/json" } ], "section_outline": [ { "name": "NAME", "lines": 2, "subsections": [] }, { "name": "SYNOPSIS", "lines": 2, "subsections": [] }, { "name": "DESCRIPTION", "lines": 4, "subsections": [] }, { "name": "OPTIONS", "lines": 3, "subsections": [ { "name": "-d --delay", "lines": 4, "flag": "-d", "long": "--delay" }, { "name": "-s --sort", "lines": 2, "flag": "-s", "long": "--sort" }, { "name": "-o --once", "lines": 2, "flag": "-o", "long": "--once" }, { "name": "-V --version", "lines": 2, "flag": "-V", "long": "--version" }, { "name": "-h --help", "lines": 2, "flag": "-h", "long": "--help" } ] }, { "name": "SORT CRITERIA", "lines": 6, "subsections": [ { "name": "character description header", "lines": 11 } ] }, { "name": "COMMANDS", "lines": 6, "subsections": [ { "name": "", "lines": 4 } ] }, { "name": "FILES", "lines": 3, "subsections": [] }, { "name": "SEE ALSO", "lines": 2, "subsections": [] }, { "name": "NOTES", "lines": 11, "subsections": [] }, { "name": "AUTHORS", "lines": 4, "subsections": [] }, { "name": "REPORTING BUGS", "lines": 3, "subsections": [] } ], "sections": { "NAME": { "content": "slabtop - display kernel slab cache information in real time\n", "subsections": [] }, "SYNOPSIS": { "content": "slabtop [options]\n", "subsections": [] }, "DESCRIPTION": { "content": "slabtop displays detailed kernel slab cache information in real time. It displays a listing\nof the top caches sorted by one of the listed sort criteria. It also displays a statistics\nheader filled with slab layer information.\n", "subsections": [] }, "OPTIONS": { "content": "Normal invocation of slabtop does not require any options. The behavior, however, can be\nfine-tuned by specifying one or more of the following flags:\n", "subsections": [ { "name": "-d --delay", "content": "Refresh the display every n in seconds. By default, slabtop refreshes the display\nevery three seconds. To exit the program, hit q. This cannot be combined with the -o\noption.\n", "flag": "-d", "long": "--delay" }, { "name": "-s --sort", "content": "Sort by S, where S is one of the sort criteria.\n", "flag": "-s", "long": "--sort" }, { "name": "-o --once", "content": "Display the output once and then exit.\n", "flag": "-o", "long": "--once" }, { "name": "-V --version", "content": "Display version information and exit.\n", "flag": "-V", "long": "--version" }, { "name": "-h --help", "content": "Display usage information and exit.\n", "flag": "-h", "long": "--help" } ] }, "SORT CRITERIA": { "content": "The following are valid sort criteria used to sort the individual slab caches and thereby de‐\ntermine what are the \"top\" slab caches to display. The default sort criteria is to sort by\nthe number of objects (\"o\").\n\nThe sort criteria can also be changed while slabtop is running by pressing the associated\ncharacter.", "subsections": [ { "name": "character description header", "content": "a number of active objects ACTIVE\nb objects per slab OBJ/SLAB\nc cache size CACHE SIZE\nl number of slabs SLABS\nv number of active slabs N/A\nn name NAME\no number of objects OBJS\np pages per slab N/A\ns object size OBJ SIZE\nu cache utilization USE\n" } ] }, "COMMANDS": { "content": "slabtop accepts keyboard commands from the user during use. The following are supported. In\nthe case of letters, both cases are accepted.\n\nEach of the valid sort characters are also accepted, to change the sort routine. See the sec‐\ntion SORT CRITERIA.\n", "subsections": [ { "name": "", "content": "Refresh the screen.\n\nQ Quit the program.\n" } ] }, "FILES": { "content": "/proc/slabinfo\nslab information\n", "subsections": [] }, "SEE ALSO": { "content": "free(1), ps(1), top(1), vmstat(8)\n", "subsections": [] }, "NOTES": { "content": "Currently, slabtop requires a 2.4 or later kernel (specifically, a version 1.1 or later\n/proc/slabinfo). Kernel 2.2 should be supported in the future.\n\nThe slabtop statistic header is tracking how many bytes of slabs are being used and is not a\nmeasure of physical memory. The 'Slab' field in the /proc/meminfo file is tracking informa‐\ntion about used slab physical memory.\n\nThe CACHE SIZE column is not accurate, it's the upper limit of memory used by specific slab.\nWhen system using slub (most common case) is under high memory pressure, there are slab order\nfallbacks, which means \"pages per slab\" is not constant and may decrease.\n", "subsections": [] }, "AUTHORS": { "content": "Written by Chris Rivera and Robert Love.\n\nslabtop was inspired by Martin Bligh's perl script, vmtop.\n", "subsections": [] }, "REPORTING BUGS": { "content": "Please send bug reports to \u001b]8;;procps@freelists.org\u001b\\procps@freelists.org\u001b]8;;\u001b\\\n\nprocps-ng 2021-03-11 SLABTOP(1)", "subsections": [] } } } }