perf lock record: improve message when tracepoints are not enabled
authorDavid Ahern <dsahern@gmail.com>
Thu, 9 Aug 2012 16:35:37 +0000 (10:35 -0600)
committerArnaldo Carvalho de Melo <acme@redhat.com>
Thu, 9 Aug 2012 17:14:28 +0000 (14:14 -0300)
commitd25dcba8541c1cc31621d5cefce0304dafb9ae4f
tree9184715b6ee64f27c797a21ee01e9ede9f831e59
parent87b6a3ad40ba304ec468b972e979e7e410852476
perf lock record: improve message when tracepoints are not enabled

If CONFIG options required for perf-lock are not enabled then the
corresponding tracepoints will not be enabled. Currently, the message to
the user is:
  $ perf lock record -a -- sleep 1
  invalid or unsupported event: 'lock:lock_acquire'
  Run 'perf list' for a list of valid events

Improve the message with a suggestion on which CONFIG options are needed:
  $ perf lock record -a -- sleep 1
  tracepoint lock:lock_acquire is not enabled. Are CONFIG_LOCKDEP and CONFIG_LOCK_STAT enabled?

Suggested-by: Arnaldo Carvalho de Melo <acme@ghostprotocols.net>
Signed-off-by: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/1344530137-25521-1-git-send-email-dsahern@gmail.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
tools/perf/builtin-lock.c