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perf tools: Prevent condition that all sort keys are elided

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If given sort keys are all elided there'll be no output except for the
overhead column - actually the TUI shows a noisy output.  In this case
it'd be better to show up the sort keys rather than elide.

Before:

  $ perf report -s comm -c perf
  (...)
  # Overhead
  # ........
  #
     100.00%

After:

  $ perf report -s comm -c perf
  (...)
  # Overhead  Command
  # ........  .......
  #
     100.00%     perf

Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Acked-by: Ingo Molnar <mingo@kernel.org>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/r/1383900822-14609-1-git-send-email-namhyung@kernel.org
[ Us curly braces around multi-line statements, as requested by Ingo Molnar ]
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Namhyung Kim 2013-11-08 17:53:42 +09:00 committed by Arnaldo Carvalho de Melo
parent a33fbd56ec
commit 7524f63b99
1 changed files with 13 additions and 0 deletions
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13
tools/perf/util/sort.c
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@ -1137,6 +1137,8 @@ static void sort_entry__setup_elide(struct sort_entry *se,
void sort__setup_elide(FILE *output)
{
struct sort_entry *se;
sort_entry__setup_elide(&sort_dso, symbol_conf.dso_list,
"dso", output);
sort_entry__setup_elide(&sort_comm, symbol_conf.comm_list,
@ -1172,4 +1174,15 @@ void sort__setup_elide(FILE *output)
"snoop", output);
}
/*
* It makes no sense to elide all of sort entries.
* Just revert them to show up again.
*/
list_for_each_entry(se, &hist_entry__sort_list, list) {
if (!se->elide)
return;
}
list_for_each_entry(se, &hist_entry__sort_list, list)
se->elide = false;
}