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perf/core improvements and fixes:

Browse source 
User visible:
 
 - Do event name substring search as last resort in 'perf list'.
   (Arnaldo Carvalho de Melo)
 
   E.g.:
 
    # perf list clock
 
    List of pre-defined events (to be used in -e):
 
      cpu-clock                                          [Software event]
      task-clock                                         [Software event]
 
      uncore_cbox_0/clockticks/                          [Kernel PMU event]
      uncore_cbox_1/clockticks/                          [Kernel PMU event]
 
      kvm:kvm_pvclock_update                             [Tracepoint event]
      kvm:kvm_update_master_clock                        [Tracepoint event]
      power:clock_disable                                [Tracepoint event]
      power:clock_enable                                 [Tracepoint event]
      power:clock_set_rate                               [Tracepoint event]
      syscalls:sys_enter_clock_adjtime                   [Tracepoint event]
      syscalls:sys_enter_clock_getres                    [Tracepoint event]
      syscalls:sys_enter_clock_gettime                   [Tracepoint event]
      syscalls:sys_enter_clock_nanosleep                 [Tracepoint event]
      syscalls:sys_enter_clock_settime                   [Tracepoint event]
      syscalls:sys_exit_clock_adjtime                    [Tracepoint event]
      syscalls:sys_exit_clock_getres                     [Tracepoint event]
      syscalls:sys_exit_clock_gettime                    [Tracepoint event]
      syscalls:sys_exit_clock_nanosleep                  [Tracepoint event]
      syscalls:sys_exit_clock_settime                    [Tracepoint event]
 
 - Reduce min 'perf stat --interval-print/-I' to 10ms (Kan Liang)
 
   perf stat --interval in action:
 
   # perf stat -e cycles -I 50 -a usleep $((200 * 1000))
   print interval < 100ms. The overhead percentage could be high in some cases. Please proceed with caution.
   #   time                    counts unit events
       0.050233636         48,240,396      cycles
       0.100557098         35,492,594      cycles
       0.150804687         39,295,112      cycles
       0.201032269         33,101,961      cycles
       0.201980732            786,379      cycles
   #
 
 - Allow for max_stack greater than PERF_MAX_STACK_DEPTH, as when
   synthesizing callchains from Intel PT data (Adrian Hunter)
 
 - Allow probing on kmodules without DWARF (Masami Hiramatsu)
 
 - Fix a segfault when processing a perf.data file with callchains using
   "perf report --call-graph none" (Namhyung Kim)
 
 - Fix unresolved COMMs in 'perf top' when -s comm is used (Namhyung Kim)
 
 - Register idle thread in 'perf top' (Namhyung Kim)
 
 - Change 'record.samples' type to unsigned long long, fixing output of
   number of samples in 32-bit architectures (Yang Shi)
 
 Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
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Merge tag 'perf-core-for-mingo' of git://git.kernel.org/pub/scm/linux/kernel/git/acme/linux into perf/core

Pull perf/core improvements and fixes from Arnaldo Carvalho de Melo:

User visible changes:

 - Do event name substring search as last resort in 'perf list'.
   (Arnaldo Carvalho de Melo)

   E.g.:

    # perf list clock

    List of pre-defined events (to be used in -e):

     cpu-clock                                          [Software event]
     task-clock                                         [Software event]

     uncore_cbox_0/clockticks/                          [Kernel PMU event]
     uncore_cbox_1/clockticks/                          [Kernel PMU event]

     kvm:kvm_pvclock_update                             [Tracepoint event]
     kvm:kvm_update_master_clock                        [Tracepoint event]
     power:clock_disable                                [Tracepoint event]
     power:clock_enable                                 [Tracepoint event]
     power:clock_set_rate                               [Tracepoint event]
     syscalls:sys_enter_clock_adjtime                   [Tracepoint event]
     syscalls:sys_enter_clock_getres                    [Tracepoint event]
     syscalls:sys_enter_clock_gettime                   [Tracepoint event]
     syscalls:sys_enter_clock_nanosleep                 [Tracepoint event]
     syscalls:sys_enter_clock_settime                   [Tracepoint event]
     syscalls:sys_exit_clock_adjtime                    [Tracepoint event]
     syscalls:sys_exit_clock_getres                     [Tracepoint event]
     syscalls:sys_exit_clock_gettime                    [Tracepoint event]
     syscalls:sys_exit_clock_nanosleep                  [Tracepoint event]
     syscalls:sys_exit_clock_settime                    [Tracepoint event]

 - Reduce min 'perf stat --interval-print/-I' to 10ms. (Kan Liang)

   perf stat --interval in action:

   # perf stat -e cycles -I 50 -a usleep $((200 * 1000))
   print interval < 100ms. The overhead percentage could be high in some cases. Please proceed with caution.
   #   time                    counts unit events
      0.050233636         48,240,396      cycles
      0.100557098         35,492,594      cycles
      0.150804687         39,295,112      cycles
      0.201032269         33,101,961      cycles
      0.201980732            786,379      cycles
  #

 - Allow for max_stack greater than PERF_MAX_STACK_DEPTH, as when
   synthesizing callchains from Intel PT data. (Adrian Hunter)

 - Allow probing on kmodules without DWARF. (Masami Hiramatsu)

 - Fix a segfault when processing a perf.data file with callchains using
   "perf report --call-graph none". (Namhyung Kim)

 - Fix unresolved COMMs in 'perf top' when -s comm is used. (Namhyung Kim)

 - Register idle thread in 'perf top'. (Namhyung Kim)

 - Change 'record.samples' type to unsigned long long, fixing output of
   number of samples in 32-bit architectures. (Yang Shi)

Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
This commit is contained in:
Ingo Molnar 2015-10-03 08:20:14 +02:00
commit e3b0ac1b7a
13 changed files with 65 additions and 26 deletions
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