perf: Fix perf lock bad rate

Fix the cast made to get the bad rate. It is made in the result
instead of the operands. We need the operands to be cast in double,
otherwise the result will always be zero.

Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Hitoshi Mitake <mitake@dcl.info.waseda.ac.jp>

diff --git a/tools/perf/builtin-lock.c b/tools/perf/builtin-lock.c
index 3b304ed4d2e9e44b93c9668bc0441677cdb1792e..d7dde9cbbdf4c902943c6932a097356063cd8bd1 100644 (file)
--- a/tools/perf/builtin-lock.c
+++ b/tools/perf/builtin-lock.c
@@ -733,8 +733,8 @@ static void print_bad_events(int bad, int total)
                { "acquire", "acquired", "contended", "release" };
 
        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 / total));
+       pr_info("bad: %d, total: %d\n", bad, total);
+       pr_info("bad rate: %f %%\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]);