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NAME | SYNOPSIS | DESCRIPTION | OPTIONS | SEE ALSO | AUTHOR | RESOURCES | COPYING | NOTES | COLOPHON |
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TRACE-CMD-MEM(1) libtracefs Manual TRACE-CMD-MEM(1)
trace-cmd-mem - show memory usage of certain kmem events
trace-cmd mem [OPTIONS][input-file]
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
[...]
-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.
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)
Written by Steven Rostedt, <rostedt@goodmis.org[1]>
https://git.kernel.org/pub/scm/utils/trace-cmd/trace-cmd.git/
Copyright (C) 2013 Red Hat, Inc. Free use of this software is
granted under the terms of the GNU Public License (GPL).
1. rostedt@goodmis.org
mailto:rostedt@goodmis.org
This page is part of the trace-cmd (a front-end for Ftrace)
project. Information about the project can be found at
⟨https://www.trace-cmd.org/⟩. If you have a bug report for this
manual page, see ⟨https://www.trace-cmd.org/⟩. This page was
obtained from the project's upstream Git repository
⟨https://git.kernel.org/pub/scm/utils/trace-cmd/trace-cmd.git⟩ on
2024-06-14. (At that time, the date of the most recent commit
that was found in the repository was 2024-02-22.) 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 man-pages@man7.org
libtracefs 09/24/2023 TRACE-CMD-MEM(1)
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HTML rendering created 2024-06-26 by Michael Kerrisk, author of The Linux Programming Interface. For details of in-depth Linux/UNIX system programming training courses that I teach, look here. Hosting by jambit GmbH. |
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