backend: fix potential divide-by-zero

[fio.git] / idletime.c

diff --git a/idletime.c b/idletime.c
index 9e6960702ca0face97c1602534bf79616f2afbaf..bc8097680d69f37b139495b61f56287b588c9693 100644 (file)
--- a/idletime.c
+++ b/idletime.c
@@ -336,7 +336,10 @@ void fio_idle_prof_stop(void)
                /* calculate idleness */
                if (ipc.cali_mean != 0.0) {
                        runt = utime_since(&ipt->tps, &ipt->tpe);
-                       ipt->idleness = ipt->loops * ipc.cali_mean / runt;
+                       if (runt)
+                               ipt->idleness = ipt->loops * ipc.cali_mean / runt;
+                       else
+                               ipt->idleness = 0.0;
                } else
                        ipt->idleness = 0.0;
        }
@@ -379,7 +382,7 @@ static double fio_idle_prof_cpu_stat(int cpu)
        return p * 100.0;
 }
 
-void fio_idle_prof_cleanup(void)
+static void fio_idle_prof_cleanup(void)
 {
        if (ipc.ipts) {
                free(ipc.ipts);