* [PATCH] rt-tests: hwlatdetect: Add check that width is not zero
@ 2026-02-26 20:34 John Kacur
0 siblings, 0 replies; only message in thread
From: John Kacur @ 2026-02-26 20:34 UTC (permalink / raw)
To: linux-rt-users; +Cc: Clark Williams, Costa Shulyupin, John Kacur
Check that width is not zero before division when calculating the MTBF
Signed-off-by: John Kacur <jkacur@redhat.com>
---
src/hwlatdetect/hwlatdetect.py | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)
diff --git a/src/hwlatdetect/hwlatdetect.py b/src/hwlatdetect/hwlatdetect.py
index abfbb954fe75..42b9f301718a 100755
--- a/src/hwlatdetect/hwlatdetect.py
+++ b/src/hwlatdetect/hwlatdetect.py
@@ -564,8 +564,9 @@ if __name__ == '__main__':
info(f"Samples exceeding threshold: {exceeding}")
if exceeding > 1:
- mtbf = ((float(detect.last) - float(detect.first)) * int(detect.get('window'))
- / ((exceeding - 1) * int(detect.get('width'))))
+ width = int(detect.get('width'))
+ if width > 0:
+ mtbf = (((float(detect.last) - float(detect.first)) * int(detect.get('window'))) / ((exceeding - 1) * width))
info(f"MTBF: {mtbf:.3f} seconds")
if detect.have_msr:
--
2.53.0
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