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

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

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

Example:

 | % ./perf bench sched pipe
 | # Running sched/pipe benchmark...
 | # Extecuted 1000000 pipe operations between two tasks
 |
 |      Total time:5.822 [sec]
 |
 |        5.822553 usecs/op
 |          171745 ops/sec
Signed-off-by: NHitoshi Mitake <mitake@dcl.info.waseda.ac.jp>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Paul Mackerras <paulus@samba.org>
LKML-Reference: <1257865442-20252-3-git-send-email-mitake@dcl.info.waseda.ac.jp>
Signed-off-by: NIngo Molnar <mingo@elte.hu>

tools/perf/bench/sched-pipe.c

@@ -92,17 +92,18 @@ int bench_sched_pipe(int argc, const char **argv,
 
 	switch (bench_format) {
 	case BENCH_FORMAT_DEFAULT:
-		printf("(executing %d pipe operations between two tasks)\n\n",
+		printf("# Extecuted %d pipe operations between two tasks\n\n",
 			loops);
 
 		result_usec = diff.tv_sec * 1000000;
 		result_usec += diff.tv_usec;
 
-		printf("\tTotal time:%lu.%03lu sec\n",
-		       diff.tv_sec, diff.tv_usec / 1000);
-		printf("\t\t%lf usecs/op\n",
+		printf(" %14s: %lu.%03lu [sec]\n\n", "Total time",
+		       diff.tv_sec, diff.tv_usec/1000);
+
+		printf(" %14lf usecs/op\n",
 		       (double)result_usec / (double)loops);
-		printf("\t\t%d ops/sec\n",
+		printf(" %14d ops/sec\n",
 		       (int)((double)loops /
 			     ((double)result_usec / (double)1000000)));
 		break;