| 42 | } |
| 43 | |
| 44 | func (this *CallStat) Sum() (successPercent float64, avgCostSeconds float64) { |
| 45 | this.locker.Lock() |
| 46 | defer this.locker.Unlock() |
| 47 | |
| 48 | var size = this.size |
| 49 | if size <= 0 { |
| 50 | size = 10 |
| 51 | } |
| 52 | |
| 53 | var totalItems = len(this.items) |
| 54 | if totalItems <= size/2 /** 低于一半的采样率，不计入统计 **/ { |
| 55 | successPercent = 100 |
| 56 | return |
| 57 | } |
| 58 | |
| 59 | var totalOkItems = 0 |
| 60 | var totalCostSeconds float64 |
| 61 | for _, item := range this.items { |
| 62 | if item.ok { |
| 63 | totalOkItems++ |
| 64 | } |
| 65 | totalCostSeconds += item.costSeconds |
| 66 | } |
| 67 | successPercent = float64(totalOkItems) * 100 / float64(totalItems) |
| 68 | avgCostSeconds = totalCostSeconds / float64(totalItems) |
| 69 | |
| 70 | return |
| 71 | } |