NAME | SYNOPSIS | DESCRIPTION | OPTIONS | SEE ALSO | COLOPHON

PERF-KMEM(1)                     perf Manual                    PERF-KMEM(1)

NAME         top

       perf-kmem - Tool to trace/measure kernel memory properties

SYNOPSIS         top

       perf kmem {record|stat} [<options>]

DESCRIPTION         top

       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.

OPTIONS         top

       -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.

SEE ALSO         top

       perf-record(1)

COLOPHON         top

       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)