[PATCH 1/3] perf bench: Fix builtin-bench.c for more friendly output

[Hitoshi Mitake]

This patch makes output of perf bench more friendly.
Current style of putput, keeping user wait
and print everything suddenly after finish,
will confuse users. So I fixed it.

Example of use(case of messaging):
| % perf bench sched messaging
| # Running sched/messaging benchmark...  <- printed right after invocation
| # 20 sender and receiver processes per group
| # 10 groups == 400 processes run

|      Total time:1.476 [sec]

Signed-off-by: Hitoshi Mitake <mitake@xxxxxxxxxxxxxxxxxxxxx>
Cc: Peter Zijlstra <a.p.zijlstra@xxxxxxxxx>
Cc: Paul Mackerras <paulus@xxxxxxxxx>
---
 tools/perf/builtin-bench.c |    4 ++++
 1 files changed, 4 insertions(+), 0 deletions(-)

diff --git a/tools/perf/builtin-bench.c b/tools/perf/builtin-bench.c
index c7505ea..90c39ba 100644
--- a/tools/perf/builtin-bench.c
+++ b/tools/perf/builtin-bench.c
@@ -156,6 +156,10 @@ int cmd_bench(int argc, const char **argv, const char *prefix __used)
 			if (strcmp(subsystems[i].suites[j].name, argv[1]))
 				continue;
 
+			if (bench_format == BENCH_FORMAT_DEFAULT)
+				printf("# Running %s/%s benchmark...\n",
+				       subsystems[i].name,
+				       subsystems[i].suites[j].name);
 			status = subsystems[i].suites[j].fn(argc - 1,
 							    argv + 1, prefix);
 			goto end;
-- 
1.5.6.5

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