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-rw-r--r--tools/cgroup/iocost_monitor.py2
1 files changed, 1 insertions, 1 deletions
diff --git a/tools/cgroup/iocost_monitor.py b/tools/cgroup/iocost_monitor.py
index 3c21de88af9e..f4699f9b46ba 100644
--- a/tools/cgroup/iocost_monitor.py
+++ b/tools/cgroup/iocost_monitor.py
@@ -173,7 +173,7 @@ class IocgStat:
self.usages = []
self.usage = 0
for i in range(NR_USAGE_SLOTS):
- usage = iocg.usages[(usage_idx + i) % NR_USAGE_SLOTS].value_()
+ usage = iocg.usages[(usage_idx + 1 + i) % NR_USAGE_SLOTS].value_()
upct = usage * 100 / HWEIGHT_WHOLE
self.usages.append(upct)
self.usage = max(self.usage, upct)