perf bench: Improve sched-message.c with more comfortable output

This patch improves sched-message.c with more comfortable output.

Change points are comment style description and
formatting numerical values and its units.

Example:

 | % perf bench sched messaging
 | # Running sched/messaging benchmark...
 | # 20 sender and receiver processes per group
 | # 10 groups == 400 processes run
 |
 |      Total time: 1.490 [sec]
Signed-off-by: Hitoshi Mitake <mitake@dcl.info.waseda.ac.jp>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Paul Mackerras <paulus@samba.org>
LKML-Reference: <1257865442-20252-4-git-send-email-mitake@dcl.info.waseda.ac.jp>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Paul Mackerras <paulus@samba.org>

tools/perf/bench/sched-messaging.c

@@ -314,12 +314,12 @@ int bench_sched_messaging(int argc, const char **argv,
 
 	switch (bench_format) {
 	case BENCH_FORMAT_DEFAULT:
-		printf("(%d sender and receiver %s per group)\n",
+		printf("# %d sender and receiver %s per group\n",
 		       num_fds, thread_mode ? "threads" : "processes");
-		printf("(%d groups == %d %s run)\n\n",
+		printf("# %d groups == %d %s run\n\n",
 		       num_groups, num_groups * 2 * num_fds,
 		       thread_mode ? "threads" : "processes");
-		printf("\tTotal time:%lu.%03lu sec\n",
+		printf(" %14s: %lu.%03lu [sec]\n", "Total time",
 		       diff.tv_sec, diff.tv_usec/1000);
 		break;
 	case BENCH_FORMAT_SIMPLE: