perf list: Allow filtering list of events

perf list: Allow filtering list of events

The man page has the details, here are some examples:

[root@emilia ~]# perf list *fault*  *:*wait*

List of pre-defined events (to be used in -e):
  page-faults OR faults                      [Software event]
  minor-faults                               [Software event]
  major-faults                               [Software event]
  alignment-faults                           [Software event]
  emulation-faults                           [Software event]

  radeon:radeon_fence_wait_begin             [Tracepoint event]
  radeon:radeon_fence_wait_end               [Tracepoint event]
  writeback:wbc_writeback_wait               [Tracepoint event]
  writeback:wbc_balance_dirty_wait           [Tracepoint event]
  writeback:writeback_congestion_wait        [Tracepoint event]
  writeback:writeback_wait_iff_congested     [Tracepoint event]
  sched:sched_wait_task                      [Tracepoint event]
  sched:sched_process_wait                   [Tracepoint event]
  sched:sched_stat_wait                      [Tracepoint event]
  sched:sched_stat_iowait                    [Tracepoint event]
  syscalls:sys_enter_epoll_wait              [Tracepoint event]
  syscalls:sys_exit_epoll_wait               [Tracepoint event]
  syscalls:sys_enter_epoll_pwait             [Tracepoint event]
  syscalls:sys_exit_epoll_pwait              [Tracepoint event]
  syscalls:sys_enter_rt_sigtimedwait         [Tracepoint event]
  syscalls:sys_exit_rt_sigtimedwait          [Tracepoint event]
  syscalls:sys_enter_waitid                  [Tracepoint event]
  syscalls:sys_exit_waitid                   [Tracepoint event]
  syscalls:sys_enter_wait4                   [Tracepoint event]
  syscalls:sys_exit_wait4                    [Tracepoint event]
  syscalls:sys_enter_waitpid                 [Tracepoint event]
  syscalls:sys_exit_waitpid                  [Tracepoint event]
[root@emilia ~]#

Suggested-by: Ingo Molnar <mingo@elte.hu>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Cc: Tom Zanussi <tzanussi@gmail.com>
LKML-Reference: <new-submission>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>