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use diffs of individual times to keep from losing (some) precision #5

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use diffs of individual times to keep from losing (some) precision #5

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13 changes: 9 additions & 4 deletions main.go
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Original file line number Diff line number Diff line change
Expand Up @@ -81,8 +81,6 @@ func executeCheck(event *types.Event) (int, error) {
return sensu.CheckStateCritical, fmt.Errorf("Error obtaining CPU timings: %v", err)
}

startTotal := start[0].User + start[0].System + start[0].Idle + start[0].Nice + start[0].Iowait + start[0].Irq + start[0].Softirq + start[0].Steal + start[0].Guest + start[0].GuestNice

duration, err := time.ParseDuration(fmt.Sprintf("%ds", plugin.Interval))
if err != nil {
return sensu.CheckStateCritical, fmt.Errorf("Error parsing duration: %v", err)
Expand All @@ -95,9 +93,16 @@ func executeCheck(event *types.Event) (int, error) {
return sensu.CheckStateCritical, fmt.Errorf("Error obtaining CPU timings: %v", err)
}

endTotal := end[0].User + end[0].System + end[0].Idle + end[0].Nice + end[0].Iowait + end[0].Irq + end[0].Softirq + end[0].Steal + end[0].Guest + end[0].GuestNice
diff := (end[0].User - start[0].User)
diff += (end[0].System - start[0].System)
diff += (end[0].Idle - start[0].Idle)
diff += (end[0].Nice - start[0].Nice)
diff += (end[0].Iowait - start[0].Iowait)
diff += (end[0].Irq - start[0].Irq)
diff += (end[0].Softirq - start[0].Softirq)
diff += (end[0].Steal - start[0].Steal)
diff += (end[0].GuestNice - start[0].GuestNice)

diff := endTotal - startTotal
idlePct := ((end[0].Idle - start[0].Idle) / diff) * 100
usedPct := 100 - idlePct

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