[PATCH 6/8] perf stat: Avoid fractional digits for integer scales

[Andi Kleen]

From: Andi Kleen <a...@linux.intel.com>

When the scaling factor is a full integer don't display fractional
digits. This avoids unnecessary .00 output for topdown metrics
with scale factors.

v2: Remove redundant check.
Signed-off-by: Andi Kleen <a...@linux.intel.com>
---
 tools/perf/builtin-stat.c | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/tools/perf/builtin-stat.c b/tools/perf/builtin-stat.c
index 5645a8361de6..db84bfc0a478 100644
--- a/tools/perf/builtin-stat.c
+++ b/tools/perf/builtin-stat.c
@@ -66,6 +66,7 @@
 #include <stdlib.h>
 #include <sys/prctl.h>
 #include <locale.h>
+#include <math.h>
 
 #define DEFAULT_SEPARATOR      " "
 #define CNTR_NOT_SUPPORTED     "<not supported>"
@@ -986,12 +987,12 @@ static void abs_printout(int id, int nr, struct 
perf_evsel *evsel, double avg)
        const char *fmt;
 
        if (csv_output) {
-               fmt = sc != 1.0 ?  "%.2f%s" : "%.0f%s";
+               fmt = floor(sc) != sc ?  "%.2f%s" : "%.0f%s";
        } else {
                if (big_num)
-                       fmt = sc != 1.0 ? "%'18.2f%s" : "%'18.0f%s";
+                       fmt = floor(sc) != sc ? "%'18.2f%s" : "%'18.0f%s";
                else
-                       fmt = sc != 1.0 ? "%18.2f%s" : "%18.0f%s";
+                       fmt = floor(sc) != sc ? "%18.2f%s" : "%18.0f%s";
        }
 
        aggr_printout(evsel, id, nr);
-- 
2.5.5