NAMN

fincore - räkna sidor med filinnehåll i kärnan

SYNOPSIS

fincore [flaggor] fil...

BESKRIVNING

fincore counts pages of file contents being resident in memory (in core), and reports the numbers. If an error occurs during counting, then an error message is printed to the stderr and fincore continues processing the rest of files listed in a command line. fincore uses the cachestat(2) syscall to count resident pages. If the cachestat(2) syscall is not available and cachestat usage is not forced with the --cachestat option, then fincore uses the mincore(2) syscall as a fallback. The cachestat(2) syscall is more efficient than mincore because it does not require a page table lock to walks page tables, and also reports more information than mincore, like the number of cached pages, dirty pages, pages marked for writeback, evicted pages, and recently evicted pages. Another difference between the two syscalls is that if write permissions are not granted to the file, then cachestat(2) returns an error, while mincore(2) for security reasons, returns fake data as if all pages were resident in memory (c.f.r. kernel commit "make mincore() more conservative" https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=134fca9063ad4851de767d1768180e5dede9a881).

Standardutdata kan komma att ändras. Så när det är möjligt bör du undvika att använda standardutdata i dina skript. Definiera alltid uttryckligen förväntade kolumner genom att använda --output columns-list i miljöer där en stabil utdata krävs.

FLAGGOR

-n, --noheadings

Skriv inte ut en rubrikrad i statusutmatningen.

-b, --bytes

Print sizes in bytes rather than in human-readable form.

By default, sizes are shown in units that are powers of 1024 bytes. The formal abbreviations for these units (KiB, MiB, GiB, ...) are further shortened to just their first letter: K, M, G, ....

-c, --total

produce a grand total.

-C, --cachestat

force usage of the cachestat(2) syscall instead of mincore(2), and fail if it’s not available.

-o, --output lista

Definiera utdatakolumner. Se utdata --help för att få en lista över de kolumner som stöds för närvarande. Standardlistan med kolumner kan utökas om lista anges i formatet +list.

--output-all

Skriv ut alla tillgängliga kolumner.

-r, --raw

Producerar utdata i råformat. Alla potentiellt osäkra tecken är hexadecalerade (\x<code>).

-J, --json

Använd JSON-utdataformat.

-R, --recursive

Recursively check all files in directories.

-h, --help

Visa hjälptext och avsluta.

-V, --version

Visa version och avsluta.