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  1. 02 12月, 2016 1 次提交
    • D
      perf tools: Move parse_nsec_time to time-utils.c · c284d669
      由 David Ahern 提交于 
      Code move only; no functional change intended.

Committer notes:

Fix the build on Ubuntu 16.04 x86-64 cross-compiling to S/390, with this
set of auto-detected features:

  ...                         dwarf: [ on  ]
  ...            dwarf_getlocations: [ on  ]
  ...                         glibc: [ on  ]
  ...                          gtk2: [ OFF ]
  ...                      libaudit: [ OFF ]
  ...                        libbfd: [ OFF ]
  ...                        libelf: [ on  ]
  ...                       libnuma: [ OFF ]
  ...        numa_num_possible_cpus: [ OFF ]
  ...                       libperl: [ OFF ]
  ...                     libpython: [ OFF ]
  ...                      libslang: [ OFF ]
  ...                     libcrypto: [ OFF ]
  ...                     libunwind: [ OFF ]
  ...            libdw-dwarf-unwind: [ on  ]
  ...                          zlib: [ on  ]
  ...                          lzma: [ OFF ]
  ...                     get_cpuid: [ OFF ]
  ...                           bpf: [ on  ]

Where it was failing with:

    CC       /tmp/build/perf/util/time-utils.o
  util/time-utils.c: In function 'parse_nsec_time':
  util/time-utils.c:17:13: error: implicit declaration of function 'strtoul' [-Werror=implicit-function-declaration]
    time_sec = strtoul(str, &end, 10);
               ^
  util/time-utils.c:17:2: error: nested extern declaration of 'strtoul' [-Werror=nested-externs]
    time_sec = strtoul(str, &end, 10);
    ^
  util/time-utils.c: In function 'perf_time__parse_str':
  util/time-utils.c:93:2: error: implicit declaration of function 'free' [-Werror=implicit-function-declaration]
    free(str);
    ^
  util/time-utils.c:93:2: error: incompatible implicit declaration of built-in function 'free' [-Werror]
  util/time-utils.c:93:2: note: include '<stdlib.h>' or provide a declaration of 'free'

Do as suggested and add a '#include <stdlib.h>' to get the free() and strtoul()
declarations and fix the build.
Signed-off-by: NDavid Ahern <dsahern@gmail.com>
Acked-by: NNamhyung Kim <namhyung@kernel.org>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/1480439746-42695-3-git-send-email-dsahern@gmail.comSigned-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>
      c284d669
  3. 25 11月, 2016 1 次提交
    • W
      perf tools: Fix kernel version error in ubuntu · d18acd15
      由 Wang Nan 提交于 
      On ubuntu the internal kernel version code is different from what can
be retrived from uname:

 $ uname -r
 4.4.0-47-generic
 $ cat /lib/modules/`uname -r`/build/include/generated/uapi/linux/version.h
 #define LINUX_VERSION_CODE 263192
 #define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))
 $ cat /lib/modules/`uname -r`/build/include/generated/utsrelease.h
 #define UTS_RELEASE "4.4.0-47-generic"
 #define UTS_UBUNTU_RELEASE_ABI 47
 $ cat /proc/version_signature
 Ubuntu 4.4.0-47.68-generic 4.4.24

The macro LINUX_VERSION_CODE is set to 4.4.24 (263192 == 0x40418), but
`uname -r` reports 4.4.0.

This mismatch causes LINUX_VERSION_CODE macro passed to BPF script become
an incorrect value, results in magic failure in BPF loading:

 $ sudo ./buildperf/perf record -e ./tools/perf/tests/bpf-script-example.c ls
 event syntax error: './tools/perf/tests/bpf-script-example.c'
                      \___ Failed to load program for unknown reason

According to Ubuntu document (https://wiki.ubuntu.com/Kernel/FAQ), the
correct kernel version can be retrived through /proc/version_signature, which
is ubuntu specific.

This patch checks the existance of /proc/version_signature, and returns
version number through parsing this file instead of uname. Version string
is untouched (value returns from uname) because `uname -r` is required
to be consistence with path of kbuild directory in /lib/module.
Signed-off-by: NWang Nan <wangnan0@huawei.com>
Cc: Alexei Starovoitov <ast@fb.com>
Cc: He Kuang <hekuang@huawei.com>
Cc: Zefan Li <lizefan@huawei.com>
Cc: pi3orama@163.com
Link: http://lkml.kernel.org/r/20161115040617.69788-2-wangnan0@huawei.comSigned-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>
      d18acd15
  5. 28 10月, 2016 1 次提交
    • N
      perf tools: Introduce timestamp__scnprintf_usec() · 99620a5d
      由 Namhyung Kim 提交于 
      Joonwoo reported that there's a mismatch between timestamps in script
and sched commands.  This was because of difference in printing the
timestamp.  Factor out the code and share it so that they can be in
sync.  Also I found that sched map has similar problem, fix it too.

Committer notes:

Fixed the max_lat_at bug introduced by Namhyung's original patch, as
pointed out by Joonwoo, and made it a function following the scnprintf()
model, i.e. returning the number of bytes formatted, and receiving as
the first parameter the object from where the data to the formatting is
obtained, renaming it from:

   char *timestamp_in_usec(char *bf, size_t size, u64 timestamp)

to

   int timestamp__scnprintf_usec(u64 timestamp, char *bf, size_t size)
Reported-by: NJoonwoo Park <joonwoop@codeaurora.org>
Signed-off-by: NNamhyung Kim <namhyung@kernel.org>
Cc: David Ahern <dsahern@gmail.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/r/20161024020246.14928-3-namhyung@kernel.orgSigned-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>
      99620a5d
  7. 24 8月, 2016 1 次提交
  9. 19 7月, 2016 1 次提交
  11. 05 7月, 2016 1 次提交
  13. 14 6月, 2016 1 次提交
  15. 17 5月, 2016 1 次提交
    • A
      perf tools: Separate accounting of contexts and real addresses in a stack trace · a29d5c9b
      由 Arnaldo Carvalho de Melo 提交于 
      The perf_sample->ip_callchain->nr value includes all the entries in the
ip_callchain->ip[] array, real addresses and PERF_CONTEXT_{KERNEL,USER,etc},
while what the user expects is that what is in the kernel.perf_event_max_stack
sysctl or in the upcoming per event perf_event_attr.sample_max_stack knob be
honoured in terms of IP addresses in the stack trace.

So match the kernel support and validate chain->nr taking into account
both kernel.perf_event_max_stack and kernel.perf_event_max_contexts_per_stack.

Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Alexei Starovoitov <ast@kernel.org>
Cc: Brendan Gregg <brendan.d.gregg@gmail.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: He Kuang <hekuang@huawei.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Masami Hiramatsu <mhiramat@kernel.org>
Cc: Milian Wolff <milian.wolff@kdab.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Vince Weaver <vincent.weaver@maine.edu>
Cc: Wang Nan <wangnan0@huawei.com>
Cc: Zefan Li <lizefan@huawei.com>
Link: http://lkml.kernel.org/n/tip-mgx0jpzfdq4uq4abfa40byu0@git.kernel.orgSigned-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>
      a29d5c9b
  17. 12 5月, 2016 1 次提交
  19. 10 5月, 2016 1 次提交
  21. 27 4月, 2016 2 次提交
  23. 24 2月, 2016 1 次提交
  25. 17 2月, 2016 1 次提交
  27. 30 1月, 2016 1 次提交
  29. 26 1月, 2016 1 次提交
  31. 12 1月, 2016 1 次提交
  33. 09 1月, 2016 1 次提交
    • N
      perf report: Show random usage tip on the help line · 14cbfbeb
      由 Namhyung Kim 提交于 
      Currently perf report only shows a help message "For a higher level
overview, try: perf report --sort comm,dso" unconditionally (even if
the sort keys were used).  Add more help tips and show randomly.

Load tips from ${prefix}/share/doc/perf-tip/tips.txt file.

  $ perf report | tail
      0.10%  swapper  [kernel.vmlinux]   [k] irq_exit
      0.09%  swapper  [kernel.vmlinux]   [k] flush_smp_call_function_queue
      0.08%  swapper  [kernel.vmlinux]   [k] native_write_msr_safe
      0.03%  swapper  [kernel.vmlinux]   [k] group_sched_in
      0.01%  perf     [kernel.vmlinux]   [k] native_write_msr_safe

  #
  # (Tip: Search options using a keyword: perf report -h <keyword>)
  #
Signed-off-by: NNamhyung Kim <namhyung@kernel.org>
Acked-by: NIngo Molnar <mingo@kernel.org>
Cc: Andi Kleen <andi@firstfloor.org>
Cc: David Ahern <dsahern@gmail.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Cc: Wang Nan <wangnan0@huawei.com>
Link: http://lkml.kernel.org/r/1452166913-27046-1-git-send-email-namhyung@kernel.org
[ Renamed it to perf_tip() and the parameter dirname to dirpath to fix the build on older distros ]
Signed-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>
      14cbfbeb
  35. 14 12月, 2015 1 次提交
  37. 10 12月, 2015 1 次提交
  39. 20 11月, 2015 1 次提交
    • N
      perf report: Add callchain value option · f2af0086
      由 Namhyung Kim 提交于 
      Now -g/--call-graph option supports how to display callchain values.
Possible values are 'percent', 'period' and 'count'.  The percent is
same as before and it's the default behavior.  The period displays the
raw period value rather than the percentage.  The count displays the
number of occurrences.

  $ perf report --no-children --stdio -g percent
  ...
    39.93%  swapper  [kernel.vmlinux]  [k] intel_idel
            |
            ---intel_idle
               cpuidle_enter_state
               cpuidle_enter
               call_cpuidle
               cpu_startup_entry
               |
               |--28.63%-- start_secondary
               |
                --11.30%-- rest_init

  $ perf report --no-children --show-total-period --stdio -g period
  ...
    39.93%   13018705  swapper  [kernel.vmlinux]  [k] intel_idel
            |
            ---intel_idle
               cpuidle_enter_state
               cpuidle_enter
               call_cpuidle
               cpu_startup_entry
               |
               |--9334403-- start_secondary
               |
                --3684302-- rest_init

  $ perf report --no-children --show-nr-samples --stdio -g count
  ...
    39.93%     80  swapper  [kernel.vmlinux]  [k] intel_idel
            |
            ---intel_idle
               cpuidle_enter_state
               cpuidle_enter
               call_cpuidle
               cpu_startup_entry
               |
               |--57-- start_secondary
               |
                --23-- rest_init
Signed-off-by: NNamhyung Kim <namhyung@kernel.org>
Acked-by: NBrendan Gregg <brendan.d.gregg@gmail.com>
Cc: Andi Kleen <andi@firstfloor.org>
Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Kan Liang <kan.liang@intel.com>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/r/1447047946-1691-6-git-send-email-namhyung@kernel.orgSigned-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>
      f2af0086
  41. 07 11月, 2015 1 次提交
  43. 23 10月, 2015 1 次提交
  45. 06 10月, 2015 1 次提交
  47. 18 9月, 2015 1 次提交
  49. 04 9月, 2015 1 次提交
  51. 03 9月, 2015 2 次提交
  53. 29 8月, 2015 2 次提交
  55. 09 8月, 2015 1 次提交
  57. 10 6月, 2015 1 次提交
    • M
      perf tools: Avoid possible race condition in copyfile() · d7c72606
      由 Milos Vyletel 提交于 
      Use unique temporary files when copying to buildid dir to prevent races
in case multiple instances are trying to copy same file. This is done by

- creating template in form <path>/.<filename>.XXXXXX where the suffix is
  used by mkstemp() to create unique file
- change file mode
- copy content
- if successful link temp file to target file
- unlink temp file

At this point the only file left at target path should be the desired
one either created by us or other instance if we raced. This should also
prevent not yet fully copied files to be visible to to other perf
instances that could try to parse them.

On top of that slow_copyfile no longer needs to deal with file mode when
creating file since temporary file is already created and mode is set.

Succesfully tested by myself by running perf record, archive and reading
the data on other system and by running perf buildid-cache on perf
binary itself. I also did revert fix from 0635b0f7 that to exposes
previously fixed race with EEXIST and recreator test passed sucessfully.
Signed-off-by: NMilos Vyletel <milos@redhat.com>
Acked-by: NIngo Molnar <mingo@kernel.org>
Cc: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Cc: Don Zickus <dzickus@redhat.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Steven Rostedt <rostedt@goodmis.org>
Link: http://lkml.kernel.org/r/1433775018-19868-1-git-send-email-milos@redhat.comSigned-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>
      d7c72606
  59. 18 5月, 2015 2 次提交
  61. 25 2月, 2015 1 次提交
  63. 11 2月, 2015 1 次提交
  65. 12 12月, 2014 2 次提交
  67. 03 10月, 2014 1 次提交
    • J
      perf callchain: Move callchain_param to util object in to fix python test · 23aadb1f
      由 Jiri Olsa 提交于 
      In following commit we changed the location of callchains data:

  72a128aa
  perf tools: Move callchain config from record_opts to callchain_param

Now all callchains stuff stays in callchain_param struct, which adds its
dependency for evsel.c object and breaks python perf.so usage
(unresolved callchain_param).

Moving callchain_param into callchain.c and adding it into
python-ext-sources unleash just another dependency hell, so I ended up
adding callchain_param into util.c for now.
Signed-off-by: NJiri Olsa <jolsa@kernel.org>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Corey Ashford <cjashfor@linux.vnet.ibm.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Milian Wolff <mail@milianw.de>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/r/1412179229-19466-2-git-send-email-jolsa@kernel.orgSigned-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>
      23aadb1f
  69. 15 8月, 2014 1 次提交