eta: fix potential divide by zero

[fio.git] / eta.c

diff --git a/eta.c b/eta.c
index 42066e0d95c044136e96c381caa04e614b48c68d..7500082f4e2398da125b8a1a01cc7e981a021222 100644 (file)
--- a/eta.c
+++ b/eta.c
@@ -174,14 +174,26 @@ static int thread_eta(struct thread_data *td)
                double perc, perc_t;
 
                bytes_done = ddir_rw_sum(td->io_bytes);
-               perc = (double) bytes_done / (double) bytes_total;
-               if (perc > 1.0)
-                       perc = 1.0;
+
+               if (bytes_total) {
+                       perc = (double) bytes_done / (double) bytes_total;
+                       if (perc > 1.0)
+                               perc = 1.0;
+               } else
+                       perc = 0.0;
 
                if (td->o.time_based) {
-                       perc_t = (double) elapsed / (double) timeout;
-                       if (perc_t < perc)
-                               perc = perc_t;
+                       if (timeout) {
+                               perc_t = (double) elapsed / (double) timeout;
+                               if (perc_t < perc)
+                                       perc = perc_t;
+                       } else {
+                               /*
+                                * Will never hit, we can't have time_based
+                                * without a timeout set.
+                                */
+                               perc = 0.0;
+                       }
                }
 
                eta_sec = (unsigned long) (elapsed * (1.0 / perc)) - elapsed;