TRACE-CMD-MEM(1)
================

NAME
----
trace-cmd-mem - show memory usage of certain kmem events

SYNOPSIS
--------
*trace-cmd mem* ['OPTIONS']['input-file']

DESCRIPTION
-----------
The trace-cmd(1) mem requires a trace-cmd record that enabled the following
events:

  kmalloc
  kmalloc_node
  kfree
  kmem_cache_alloc
  kmem_cache_alloc_node
  kmem_cache_alloc_free

It then reads the amount requested and the ammount freed as well as the
functions that called the allocation. It then reports the final amount
of bytes requested and allocated, along with the total amount allocated
and requested, as well as the max allocation and requested during the run.
It reports the amount of wasted bytes (allocated - requested) that was
not freed, as well as the max wasted amount during the run. The list is 
sorted by descending order of wasted bytes after the run.

                Function                Waste   Alloc   req             TotAlloc     TotReq             MaxAlloc     MaxReq     MaxWaste
                --------                -----   -----   ---             --------     ------             --------     ------     --------
          rb_allocate_cpu_buffer        768     2304    1536                2304       1536                 2304       1536     768
                 alloc_pipe_info        400     1152    752                 1152        752                 1152        752     400
                  instance_mkdir        252     544     292                  544        292                  544        292     252
                       __d_alloc        215     1086560 1086345          1087208    1086993              1086560    1086345     215
                  get_empty_filp        72      2304    2232                4864       4712                 4864       4712     152
                        mm_alloc        40      960     920                  960        920                  960        920     40
                   prepare_creds        32      192     160                 1728       1440                 1728       1440     288
            tracing_buffers_open        8       32      24                    32         24                   32         24     8
                          do_brk        0       0       0                    368        368                  368        368     0
        journal_add_journal_head        0       6048    6048                6048       6048                 6048       6048     0
                   journal_start        0       0       0                   1224       1224                   48         48     0
             __rb_allocate_pages        0       3289856 3289856          3289856    3289856              3289856    3289856     0
                  anon_vma_alloc        0       0       0                    936        936                  864        864     0
                                                                [...]

OPTIONS
-------
*-i* 'input-file'::
    By default, trace-cmd hist will read the file 'trace.dat'. But the *-i*
    option open up the given 'input-file' instead. Note, the input file may
    also be specified as the last item on the command line.

SEE ALSO
--------
trace-cmd(1), trace-cmd-record(1), trace-cmd-report(1), trace-cmd-start(1),
trace-cmd-stop(1), trace-cmd-extract(1), trace-cmd-reset(1), trace-cmd-hist(1),
trace-cmd-split(1), trace-cmd-listen(1)

AUTHOR
------
Written by Steven Rostedt, <rostedt@goodmis.org>

RESOURCES
---------
https://git.kernel.org/pub/scm/utils/trace-cmd/trace-cmd.git/

COPYING
-------
Copyright \(C) 2013 Red Hat, Inc. Free use of this software is granted under
the terms of the GNU Public License (GPL).

