Hi All
When pdi->events and pdi->seq_skips are both 0, current code will do
0/0.
blkparse.c | 10 +++++++---
1 file changed, 7 insertions(+), 3 deletions(-)
diff --git a/blkparse.c b/blkparse.c
index cbb422f..b4c371a 100644
--- a/blkparse.c
+++ b/blkparse.c
@@ -1615,6 +1615,7 @@ static void show_device_and_cpu_stats(vo
int i, j, pci_events;
char line[3 + 8/*cpu*/ + 2 + 32/*dev*/ + 3];
char name[32];
+ double ratio;
for (pdi = devices, i = 0; i < ndevices; i++, pdi++) {
@@ -1674,10 +1675,13 @@ static void show_device_and_cpu_stats(vo
get_dev_name(pdi, line, sizeof(line)), pdi->events);
collect_pdi_skips(pdi);
+ if (!pdi->skips && !pdi->events)
+ ratio = 0.0;
+ else
+ ratio = 100.0 * ((double)pdi->seq_skips /
+ (double)(pdi->events + pdi->seq_skips));
fprintf(ofp, "Skips: %'lu forward (%'llu - %5.1lf%%)\n",
- pdi->skips,pdi->seq_skips,
- 100.0 * ((double)pdi->seq_skips /
- (double)(pdi->events + pdi->seq_skips)));
+ pdi->skips, pdi->seq_skips, ratio);
}
}
-
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