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  1. 13 4月, 2015 1 次提交
    • N
      perf kmem: Analyze page allocator events also · 0d68bc92
      由 Namhyung Kim 提交于 
      The perf kmem command records and analyze kernel memory allocation only
for SLAB objects.  This patch implement a simple page allocator analyzer
using kmem:mm_page_alloc and kmem:mm_page_free events.

It adds two new options of --slab and --page.  The --slab option is for
analyzing SLAB allocator and that's what perf kmem currently does.

The new --page option enables page allocator events and analyze kernel
memory usage in page unit.  Currently, 'stat --alloc' subcommand is
implemented only.

If none of these --slab nor --page is specified, --slab is implied.

First run 'perf kmem record' to generate a suitable perf.data file:

  # perf kmem record --page sleep 5

Then run 'perf kmem stat' to postprocess the perf.data file:

  # perf kmem stat --page --alloc --line 10

  -------------------------------------------------------------------------------
   PFN              | Total alloc (KB) | Hits     | Order | Mig.type | GFP flags
  -------------------------------------------------------------------------------
            4045014 |               16 |        1 |     2 |  RECLAIM |  00285250
            4143980 |               16 |        1 |     2 |  RECLAIM |  00285250
            3938658 |               16 |        1 |     2 |  RECLAIM |  00285250
            4045400 |               16 |        1 |     2 |  RECLAIM |  00285250
            3568708 |               16 |        1 |     2 |  RECLAIM |  00285250
            3729824 |               16 |        1 |     2 |  RECLAIM |  00285250
            3657210 |               16 |        1 |     2 |  RECLAIM |  00285250
            4120750 |               16 |        1 |     2 |  RECLAIM |  00285250
            3678850 |               16 |        1 |     2 |  RECLAIM |  00285250
            3693874 |               16 |        1 |     2 |  RECLAIM |  00285250
   ...              | ...              | ...      | ...   | ...      | ...
  -------------------------------------------------------------------------------

  SUMMARY (page allocator)
  ========================
  Total allocation requests     :           44,260   [          177,256 KB ]
  Total free requests           :              117   [              468 KB ]

  Total alloc+freed requests    :               49   [              196 KB ]
  Total alloc-only requests     :           44,211   [          177,060 KB ]
  Total free-only requests      :               68   [              272 KB ]

  Total allocation failures     :                0   [                0 KB ]

  Order     Unmovable   Reclaimable       Movable      Reserved  CMA/Isolated
  -----  ------------  ------------  ------------  ------------  ------------
      0            32             .        44,210             .             .
      1             .             .             .             .             .
      2             .            18             .             .             .
      3             .             .             .             .             .
      4             .             .             .             .             .
      5             .             .             .             .             .
      6             .             .             .             .             .
      7             .             .             .             .             .
      8             .             .             .             .             .
      9             .             .             .             .             .
     10             .             .             .             .             .
Signed-off-by: NNamhyung Kim <namhyung@kernel.org>
Tested-by: NArnaldo Carvalho de Melo <acme@redhat.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Joonsoo Kim <js1304@gmail.com>
Cc: Minchan Kim <minchan@kernel.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: linux-mm@kvack.org
Link: http://lkml.kernel.org/r/1428298576-9785-4-git-send-email-namhyung@kernel.orgSigned-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>
      0d68bc92
  3. 08 4月, 2015 1 次提交
  5. 03 4月, 2015 1 次提交
    • Y
      perf kmem: Support using -f to override perf.data file ownership · d1eeb77c
      由 Yunlong Song 提交于 
      Enable perf kmem to use perf.data when it is not owned by current user
or root.

Example:

 # perf kmem record ls
 # chown Yunlong.Song:Yunlong.Song perf.data
 # ls -al perf.data
 -rw------- 1 Yunlong.Song Yunlong.Song 5315665 Apr  2 10:54 perf.data
 # id
 uid=0(root) gid=0(root) groups=0(root),64(pkcs11)

Before this patch:

 # perf kmem stat
 File perf.data not owned by current user or root (use -f to override)
 # perf kmem stat -f
   Error: unknown switch `f'

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

     -i, --input <file>    input file name
     -v, --verbose         be more verbose (show symbol address, etc)
         --caller          show per-callsite statistics
         --alloc           show per-allocation statistics
     -s, --sort <key[,key2...]>
                           sort by keys: ptr, call_site, bytes, hit,
                           pingpong, frag
     -l, --line <num>      show n lines
         --raw-ip          show raw ip instead of symbol

As shown above, the -f option does not work at all.

After this patch:

 # perf kmem stat
 File perf.data not owned by current user or root (use -f to override)
 # perf kmem stat -f
 SUMMARY
 =======
 Total bytes requested: 437599
 Total bytes allocated: 615472
 Total bytes wasted on internal fragmentation: 177873
 Internal fragmentation: 28.900259%
 Cross CPU allocations: 6/1192

As shown above, the -f option really works now.
Signed-off-by: NYunlong Song <yunlong.song@huawei.com>
Tested-by: NArnaldo Carvalho de Melo <acme@redhat.com>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Wang Nan <wangnan0@huawei.com>
Link: http://lkml.kernel.org/r/1427982439-27388-4-git-send-email-yunlong.song@huawei.comSigned-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>
      d1eeb77c
  7. 24 3月, 2015 1 次提交
  9. 13 3月, 2015 3 次提交
    • N
      perf kmem: Fix alignment of slab result table · 65f46e02
      由 Namhyung Kim 提交于 
      Its table was a bit misaligned.  Fix it.

Before:

  # perf kmem stat --caller -l 10
  ------------------------------------------------------------------------------------------------------
   Callsite                           | Total_alloc/Per | Total_req/Per   | Hit      | Ping-pong | Frag
  ------------------------------------------------------------------------------------------------------
   radeon_cs_parser_init.part.1+11a   |      2080/260   |      1504/188   |        8 |        0 | 27.692%
   radeon_cs_parser_init.part.1+e1    |       384/96    |       288/72    |        4 |        0 | 25.000%
   radeon_cs_parser_init.part.1+93    |       128/32    |        96/24    |        4 |        0 | 25.000%
   load_elf_binary+a39                |       512/512   |       392/392   |        1 |        0 | 23.438%
   __alloc_skb+89                     |      6144/877   |      4800/685   |        7 |        6 | 21.875%
   radeon_fence_emit+5c               |      1152/192   |       912/152   |        6 |        0 | 20.833%
   radeon_cs_parser_relocs+ad         |      8192/2048  |      6624/1656  |        4 |        0 | 19.141%
   radeon_sa_bo_new+78                |      1280/64    |      1120/56    |       20 |        0 | 12.500%
   load_elf_binary+2c4                |        32/32    |        28/28    |        1 |        0 | 12.500%
   anon_vma_prepare+101               |       576/72    |       512/64    |        8 |        0 | 11.111%
   ...                                | ...             | ...             | ...    | ...      | ...
  ------------------------------------------------------------------------------------------------------

After:

  ---------------------------------------------------------------------------------------------------------
   Callsite                           | Total_alloc/Per | Total_req/Per   | Hit      | Ping-pong | Frag
  ---------------------------------------------------------------------------------------------------------
   radeon_cs_parser_init.part.1+11a   |      2080/260   |      1504/188   |        8 |         0 | 27.692%
   radeon_cs_parser_init.part.1+e1    |       384/96    |       288/72    |        4 |         0 | 25.000%
   radeon_cs_parser_init.part.1+93    |       128/32    |        96/24    |        4 |         0 | 25.000%
   load_elf_binary+a39                |       512/512   |       392/392   |        1 |         0 | 23.438%
   __alloc_skb+89                     |      6144/877   |      4800/685   |        7 |         6 | 21.875%
   radeon_fence_emit+5c               |      1152/192   |       912/152   |        6 |         0 | 20.833%
   radeon_cs_parser_relocs+ad         |      8192/2048  |      6624/1656  |        4 |         0 | 19.141%
   radeon_sa_bo_new+78                |      1280/64    |      1120/56    |       20 |         0 | 12.500%
   load_elf_binary+2c4                |        32/32    |        28/28    |        1 |         0 | 12.500%
   anon_vma_prepare+101               |       576/72    |       512/64    |        8 |         0 | 11.111%
   ...                                | ...             | ...             | ...      | ...       | ...
  ---------------------------------------------------------------------------------------------------------
Signed-off-by: NNamhyung Kim <namhyung@kernel.org>
Tested-by: NArnaldo Carvalho de Melo <acme@redhat.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Joonsoo Kim <js1304@gmail.com>
Cc: Minchan Kim <minchan@kernel.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/r/1426145571-3065-4-git-send-email-namhyung@kernel.orgSigned-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>
      65f46e02
    • N
      perf kmem: Allow -v option · bd72a33e
      由 Namhyung Kim 提交于 
      Current perf kmem fails when -v option is used.  As it's very useful for
debugging, let's allow it.
Signed-off-by: NNamhyung Kim <namhyung@kernel.org>
Cc: David Ahern <dsahern@gmail.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Joonsoo Kim <js1304@gmail.com>
Cc: Minchan Kim <minchan@kernel.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/r/1426145571-3065-3-git-send-email-namhyung@kernel.orgSigned-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>
      bd72a33e
    • N
      perf kmem: Fix segfault when invalid sort key is given · 405f8755
      由 Namhyung Kim 提交于 
      When it tries to free 'str', it was already updated by strsep() - so it
needs to save the original pointer.

  # perf kmem stat -s xxx,hit
    Error: Unknown --sort key: 'xxx'
  *** Error in `perf': free(): invalid pointer: 0x0000000000e9e7b6 ***
  ======= Backtrace: =========
  /usr/lib/libc.so.6(+0x7198e)[0x7fc7e6e0d98e]
  /usr/lib/libc.so.6(+0x76dee)[0x7fc7e6e12dee]
  /usr/lib/libc.so.6(+0x775cb)[0x7fc7e6e135cb]
  ./perf[0x44a1b5]
  ./perf[0x490b20]
  ./perf(parse_options_step+0x173)[0x491773]
  ./perf(parse_options_subcommand+0xa7)[0x491fb7]
  ./perf(cmd_kmem+0x2bc)[0x44ae4c]
  ./perf[0x47aa13]
  ./perf(main+0x60a)[0x427a9a]
  /usr/lib/libc.so.6(__libc_start_main+0xf0)[0x7fc7e6dbc800]
  ./perf(_start+0x29)[0x427bb9]
Signed-off-by: NNamhyung Kim <namhyung@kernel.org>
Tested-by: NArnaldo Carvalho de Melo <acme@redhat.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Joonsoo Kim <js1304@gmail.com>
Cc: Minchan Kim <minchan@kernel.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/r/1426145571-3065-2-git-send-email-namhyung@kernel.orgSigned-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>
      405f8755
  11. 11 3月, 2015 1 次提交
  13. 26 9月, 2014 1 次提交
  15. 14 8月, 2014 2 次提交
    • N
      perf tools: Check recorded kernel version when finding vmlinux · 0a7e6d1b
      由 Namhyung Kim 提交于 
      Currently vmlinux_path__init() only tries to find vmlinux file from
current directory, /boot and some canonical directories with version
number of the running kernel.  This can be a problem when reporting old
data recorded on a kernel version not running currently.

We can use --symfs option for this but it's annoying for user to do it
always.  As we already have the info in the perf.data file, it can be
changed to use it for the search automatically.

Before:

  $ perf report
  ...
  # Samples: 4K of event 'cpu-clock'
  # Event count (approx.): 1067250000
  #
  # Overhead  Command     Shared Object      Symbol
  # ........  ..........  .................  ..............................
      71.87%     swapper  [kernel.kallsyms]  [k] recover_probed_instruction

After:

  # Overhead  Command     Shared Object      Symbol
  # ........  ..........  .................  ....................
      71.87%     swapper  [kernel.kallsyms]  [k] native_safe_halt

This requires to change signature of symbol__init() to receive struct
perf_session_env *.
Reported-by: NMinchan Kim <minchan@kernel.org>
Signed-off-by: NNamhyung Kim <namhyung@kernel.org>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>
Cc: Minchan Kim <minchan@kernel.org>
Cc: Namhyung Kim <namhyung.kim@lge.com>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/r/1407825645-24586-14-git-send-email-namhyung@kernel.orgSigned-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>
      0a7e6d1b
    • N
      perf kmem: Move session handling out of __cmd_kmem() · 2b2b2c68
      由 Namhyung Kim 提交于 
      This is a preparation of fixing dso__load_kernel_sym().  It needs a
session info before calling symbol__init().
Signed-off-by: NNamhyung Kim <namhyung@kernel.org>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Minchan Kim <minchan@kernel.org>
Cc: Namhyung Kim <namhyung.kim@lge.com>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/r/1407825645-24586-7-git-send-email-namhyung@kernel.orgSigned-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>
      2b2b2c68
  17. 12 8月, 2014 2 次提交
  19. 12 5月, 2014 1 次提交
  21. 22 4月, 2014 1 次提交
  23. 16 4月, 2014 1 次提交
  25. 07 11月, 2013 1 次提交
  27. 04 11月, 2013 1 次提交
  29. 22 10月, 2013 1 次提交
  31. 25 9月, 2013 1 次提交
  33. 30 8月, 2013 1 次提交
  35. 29 8月, 2013 1 次提交
  37. 13 7月, 2013 1 次提交
  39. 09 7月, 2013 1 次提交
  41. 25 1月, 2013 3 次提交
  43. 29 10月, 2012 1 次提交
  45. 03 10月, 2012 1 次提交
  47. 24 9月, 2012 1 次提交
  49. 11 9月, 2012 1 次提交
    • I
      perf tools: Use __maybe_used for unused variables · 1d037ca1
      由 Irina Tirdea 提交于 
      perf defines both __used and __unused variables to use for marking
unused variables. The variable __used is defined to
__attribute__((__unused__)), which contradicts the kernel definition to
__attribute__((__used__)) for new gcc versions. On Android, __used is
also defined in system headers and this leads to warnings like: warning:
'__used__' attribute ignored

__unused is not defined in the kernel and is not a standard definition.
If __unused is included everywhere instead of __used, this leads to
conflicts with glibc headers, since glibc has a variables with this name
in its headers.

The best approach is to use __maybe_unused, the definition used in the
kernel for __attribute__((unused)). In this way there is only one
definition in perf sources (instead of 2 definitions that point to the
same thing: __used and __unused) and it works on both Linux and Android.
This patch simply replaces all instances of __used and __unused with
__maybe_unused.
Signed-off-by: NIrina Tirdea <irina.tirdea@intel.com>
Acked-by: NPekka Enberg <penberg@kernel.org>
Cc: David Ahern <dsahern@gmail.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Namhyung Kim <namhyung.kim@lge.com>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Steven Rostedt <rostedt@goodmis.org>
Link: http://lkml.kernel.org/r/1347315303-29906-7-git-send-email-irina.tirdea@intel.com
[ committer note: fixed up conflict with a116e05d in builtin-sched.c ]
Signed-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>
      1d037ca1
  51. 09 9月, 2012 1 次提交
  53. 08 8月, 2012 2 次提交
    • A
      perf kmem: Use evsel->tp_format and perf_sample · 22ad798c
      由 Arnaldo Carvalho de Melo 提交于 
      To reduce the number of parameters passed to the various event handling
functions.

Cc: Andrey Wagin <avagin@gmail.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Namhyung Kim <namhyung@gmail.com>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/n/tip-p936ngz06yo5h797ggsm7xru@git.kernel.orgSigned-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>
      22ad798c
    • A
      perf evsel: Cache associated event_format · fcf65bf1
      由 Arnaldo Carvalho de Melo 提交于 
      We already lookup the associated event_format when reading the perf.data
header, so that we can cache the tracepoint name in evsel->name, so do
it a little further and save the event_format itself, so that we can
avoid relookups in tools that need to access it.

Change the tools to take the most obvious advantage, when they were
using pevent_find_event directly. More work is needed for further
removing the need of a pointer to pevent, such as when asking for event
field values ("common_pid" and the other common fields and per
event_format fields).

This is something that was planned but only got actually done when
Andrey Wagin needed to do this lookup at perf_tool->sample() time, when
we don't have access to pevent (session->pevent) to use with
pevent_find_event().

Cc: Andrey Wagin <avagin@gmail.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Namhyung Kim <namhyung@gmail.com>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Signed-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>
Link: http://lkml.kernel.org/n/tip-txkvew2ckko0b594ae8fbnyk@git.kernel.orgSigned-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>
      fcf65bf1
  55. 28 6月, 2012 1 次提交
    • A
      perf tools: Stop using a global trace events description list · da378962
      由 Arnaldo Carvalho de Melo 提交于 
      The pevent thing is per perf.data file, so I made it stop being static
and become a perf_session member, so tools processing perf.data files
use perf_session and _there_ we read the trace events description into
session->pevent and then change everywhere to stop using that single
global pevent variable and use the per session one.

Note that it _doesn't_ fall backs to trace__event_id, as we're not
interested at all in what is present in the
/sys/kernel/debug/tracing/events in the workstation doing the analysis,
just in what is in the perf.data file.

This patch also introduces perf_session__set_tracepoints_handlers that
is the perf perf.data/session way to associate handlers to tracepoint
events by resolving their IDs using the events descriptions stored in a
perf.data file. Make 'perf sched' use it.
Reported-by: NDmitry Antipov <dmitry.antipov@linaro.org>
Tested-by: NDmitry Antipov <dmitry.antipov@linaro.org>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Namhyung Kim <namhyung@gmail.com>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: linaro-dev@lists.linaro.org
Cc: patches@linaro.org
Link: http://lkml.kernel.org/r/20120625232016.GA28525@infradead.orgSigned-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>
      da378962
  57. 25 4月, 2012 1 次提交
    • S
      perf: Have perf use the new libtraceevent.a library · aaf045f7
      由 Steven Rostedt 提交于 
      The event parsing code in perf was originally copied from trace-cmd
but never was kept up-to-date with the changes that was done there.
The trace-cmd libtraceevent.a code is much more mature than what is
currently in perf.

This updates the code to use wrappers to handle the calls to the
new event parsing code. The new code requires a handle to be pass
around, which removes the global event variables and allows
more than one event structure to be read from different files
(and different machines).

But perf still has the old global events and the code throughout
perf does not yet have a nice way to pass around a handle.
A global 'pevent' has been made for perf and the old calls have
been created as wrappers to the new event parsing code that uses
the global pevent.

With this change, perf can later incorporate the pevent handle into
the perf structures and allow more than one file to be read and
compared, that contains different events.
Signed-off-by: NSteven Rostedt <rostedt@goodmis.org>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Arnaldo Carvalho de Melo <acme@infradead.org>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Arun Sharma <asharma@fb.com>
Cc: Namhyung Kim <namhyung.kim@lge.com>
Signed-off-by: NFrederic Weisbecker <fweisbec@gmail.com>
      aaf045f7
  59. 08 1月, 2012 2 次提交
  61. 24 12月, 2011 1 次提交
    • R
      perf report: Accept fifos as input file · efad1415
      由 Robert Richter 提交于 
      The default input file for perf report is not handled the same way as
perf record does it for its output file. This leads to unexpected
behavior of perf report, etc. E.g.:

 # perf record -a -e cpu-cycles sleep 2 | perf report | cat
 failed to open perf.data: No such file or directory  (try 'perf record' first)

While perf record writes to a fifo, perf report expects perf.data to be
read. This patch changes this to accept fifos as input file.

Applies to the following commands:

 perf annotate
 perf buildid-list
 perf evlist
 perf kmem
 perf lock
 perf report
 perf sched
 perf script
 perf timechart

Also fixes char const* -> const char* type declaration for filename
strings.

v2:
* Prevent potential null pointer access to input_name in
  builtin-report.c. Needed due to removal of patch "perf report: Setup
  browser if stdout is a pipe"

Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/r/1323248577-11268-5-git-send-email-robert.richter@amd.comSigned-off-by: NRobert Richter <robert.richter@amd.com>
Signed-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>
      efad1415
  63. 28 11月, 2011 1 次提交