NAME | SYNOPSIS | DESCRIPTION | OPTIONS | SEE ALSO | COLOPHON |
|
|
PERF-KMEM(1) perf Manual PERF-KMEM(1)
perf-kmem - Tool to trace/measure kernel memory properties
perf kmem [<options>] {record|stat}
There are two variants of perf kmem: 'perf kmem [<options>] record [<perf-record-options>] <command>' to record the kmem events of an arbitrary workload. Additional 'perf record' options may be specified after record, such as '-o' to change the output file name. 'perf kmem [<options>] stat' to report kernel memory statistics.
-i <file>, --input=<file> For stat, select the input file (default: perf.data unless stdin is a fifo) -f, --force Don’t do ownership validation -v, --verbose Be more verbose. (show symbol address, etc) --caller Show per-callsite statistics --alloc Show per-allocation statistics -s <key[,key2...]>, --sort=<key[,key2...]> Sort the output (default: frag,hit,bytes for slab and bytes,hit for page). Available sort keys are ptr, callsite, bytes, hit, pingpong, frag for slab and page, callsite, bytes, hit, order, migtype, gfp for page. This option should be preceded by one of the mode selection options - i.e. --slab, --page, --alloc and/or --caller. -l <num>, --line=<num> Print n lines only --raw-ip Print raw ip instead of symbol --slab Analyze SLAB allocator events. --page Analyze page allocator events --live Show live page stat. The perf kmem shows total allocation stat by default, but this option shows live (currently allocated) pages instead. (This option works with --page option only) --time=<start>,<stop> Only analyze samples within given time window: <start>,<stop>. Times have the format seconds.microseconds. If start is not given (i.e., time string is ,x.y) then analysis starts at the beginning of the file. If stop time is not given (i.e, time string is x.y,) then analysis goes to end of file.
perf-record(1)
This page is part of the perf (Performance analysis tools for
Linux (in Linux source tree)) project. Information about the
project can be found at
⟨https://perf.wiki.kernel.org/index.php/Main_Page⟩. If you have a
bug report for this manual page, send it to
[email protected]. This page was obtained from the
project's upstream Git repository
⟨http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git⟩
on 2024-06-14. (At that time, the date of the most recent commit
that was found in the repository was 2024-06-13.) If you
discover any rendering problems in this HTML version of the page,
or you believe there is a better or more up-to-date source for
the page, or you have corrections or improvements to the
information in this COLOPHON (which is not part of the original
manual page), send a mail to [email protected]
perf 2021-10-08 PERF-KMEM(1)
Pages that refer to this page: perf(1)