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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 {record|stat} [<options>]
There are two variants of perf kmem:
'perf kmem record <command>' to record the kmem events
of an arbitrary workload.
'perf kmem stat' to report kernel memory statistics.
-i <file>, --input=<file>
Select the input file (default: perf.data unless stdin is a fifo)
-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
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
linux-kernel@vger.kernel.org. This page was obtained from the
project's upstream Git repository
⟨http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git⟩ on
2017-07-05. If you discover any rendering problems in this HTML ver‐
sion 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 man‐
ual page), send a mail to man-pages@man7.org
perf 02/18/2017 PERF-KMEM(1)