perf lock: Limit bad rate precision

Two decimal precision should be enough for this.

Signed-off-by: Davidlohr Bueso <[email protected]>
Cc: Aswin Chandramouleeswaran <[email protected]>
Cc: Frederic Weisbecker <[email protected]>
Cc: Hitoshi Mitake <[email protected]>
Cc: Ingo Molnar <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Link: http://lkml.kernel.org/r/[email protected]
Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>

diff --git a/tools/perf/builtin-lock.c b/tools/perf/builtin-lock.c
index 780484fb59a0c4d74633526563cee46c92209cdd..972310cbeb63b069b44c7cba9d19eead1ba3f97a 100644 (file)
--- a/tools/perf/builtin-lock.c
+++ b/tools/perf/builtin-lock.c
@@ -686,7 +686,7 @@ static void print_bad_events(int bad, int total)
 
        pr_info("\n=== output for debug===\n\n");
        pr_info("bad: %d, total: %d\n", bad, total);
-       pr_info("bad rate: %f %%\n", (double)bad / (double)total * 100);
+       pr_info("bad rate: %.2f %%\n", (double)bad / (double)total * 100);
        pr_info("histogram of events caused bad sequence\n");
        for (i = 0; i < BROKEN_MAX; i++)
                pr_info(" %10s: %d\n", name[i], bad_hist[i]);