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util.go
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util.go
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package metrics
import (
"fmt"
"io"
"github.com/rcrowley/go-metrics"
)
// NOTE: This is copy & pasted from cbft as otherwise there
// would be an import cycle.
var timerPercentiles = []float64{0.5, 0.75, 0.95, 0.99, 0.999}
func WriteTimerJSON(w io.Writer, timer metrics.Timer) {
t := timer.Snapshot()
p := t.Percentiles(timerPercentiles)
fmt.Fprintf(w, `{"count":%9d,`, t.Count())
fmt.Fprintf(w, `"min":%9d,`, t.Min())
fmt.Fprintf(w, `"max":%9d,`, t.Max())
fmt.Fprintf(w, `"mean":%12.2f,`, t.Mean())
fmt.Fprintf(w, `"stddev":%12.2f,`, t.StdDev())
fmt.Fprintf(w, `"percentiles":{`)
fmt.Fprintf(w, `"median":%12.2f,`, p[0])
fmt.Fprintf(w, `"75%%":%12.2f,`, p[1])
fmt.Fprintf(w, `"95%%":%12.2f,`, p[2])
fmt.Fprintf(w, `"99%%":%12.2f,`, p[3])
fmt.Fprintf(w, `"99.9%%":%12.2f},`, p[4])
fmt.Fprintf(w, `"rates":{`)
fmt.Fprintf(w, `"1-min":%12.2f,`, t.Rate1())
fmt.Fprintf(w, `"5-min":%12.2f,`, t.Rate5())
fmt.Fprintf(w, `"15-min":%12.2f,`, t.Rate15())
fmt.Fprintf(w, `"mean":%12.2f}}`, t.RateMean())
}
func WriteTimerCSVHeader(w io.Writer, prefix string) {
fmt.Fprintf(w, "%s-count,", prefix)
fmt.Fprintf(w, "%s-min,", prefix)
fmt.Fprintf(w, "%s-max,", prefix)
fmt.Fprintf(w, "%s-mean,", prefix)
fmt.Fprintf(w, "%s-stddev,", prefix)
fmt.Fprintf(w, "%s-percentile-50%%,", prefix)
fmt.Fprintf(w, "%s-percentile-75%%,", prefix)
fmt.Fprintf(w, "%s-percentile-95%%,", prefix)
fmt.Fprintf(w, "%s-percentile-99%%,", prefix)
fmt.Fprintf(w, "%s-percentile-99.9%%,", prefix)
fmt.Fprintf(w, "%s-rate-1-min,", prefix)
fmt.Fprintf(w, "%s-rate-5-min,", prefix)
fmt.Fprintf(w, "%s-rate-15-min,", prefix)
fmt.Fprintf(w, "%s-rate-mean", prefix)
}
func WriteTimerCSV(w io.Writer, timer metrics.Timer) {
t := timer.Snapshot()
p := t.Percentiles(timerPercentiles)
fmt.Fprintf(w, `%d,`, t.Count())
fmt.Fprintf(w, `%d,`, t.Min())
fmt.Fprintf(w, `%d,`, t.Max())
fmt.Fprintf(w, `%f,`, t.Mean())
fmt.Fprintf(w, `%f,`, t.StdDev())
fmt.Fprintf(w, `%f,`, p[0])
fmt.Fprintf(w, `%f,`, p[1])
fmt.Fprintf(w, `%f,`, p[2])
fmt.Fprintf(w, `%f,`, p[3])
fmt.Fprintf(w, `%f,`, p[4])
fmt.Fprintf(w, `%f,`, t.Rate1())
fmt.Fprintf(w, `%f,`, t.Rate5())
fmt.Fprintf(w, `%f,`, t.Rate15())
fmt.Fprintf(w, `%f`, t.RateMean())
}