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bugfix: ipconfig 滑动窗口解决流量毛刺 #22

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bugfix: ipconfig 滑动窗口解决流量毛刺 #22

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10 changes: 6 additions & 4 deletions ipconf/domain/window.go
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Original file line number Diff line number Diff line change
@@ -1,7 +1,7 @@
package domain

const (
windowSize = 5
windowSize = 5 // 防止流量毛刺，取5个点的平均值
)

type stateWindow struct {
Expand All @@ -20,14 +20,16 @@ func newStateWindow() *stateWindow {
}

func (sw *stateWindow) getStat() *Stat {
res := sw.sumStat.Clone()
res := sw.sumStat.Clone() // 因为sumStat是指针，所以需要clone一份计算均值后返回
res.Avg(windowSize)
return res
}

func (sw *stateWindow) appendStat(s *Stat) {
// 减去即将被删除的state
sw.sumStat.Sub(sw.stateQueue[sw.idx%windowSize])
// 窗口大小没达到windowSize直接入窗，否则减去窗口最前面的state
if sw.idx >= windowSize {
sw.sumStat.Sub(sw.stateQueue[sw.idx%windowSize])
}
// 更新最新的stat
sw.stateQueue[sw.idx%windowSize] = s
// 计算最新的窗口和
Expand Down