45 lines
1,013 B
Go
45 lines
1,013 B
Go
package hdrhistogram
|
|
|
|
// A WindowedHistogram combines histograms to provide windowed statistics.
|
|
type WindowedHistogram struct {
|
|
idx int
|
|
h []Histogram
|
|
m *Histogram
|
|
|
|
Current *Histogram
|
|
}
|
|
|
|
// NewWindowed creates a new WindowedHistogram with N underlying histograms with
|
|
// the given parameters.
|
|
func NewWindowed(n int, minValue, maxValue int64, sigfigs int) *WindowedHistogram {
|
|
w := WindowedHistogram{
|
|
idx: -1,
|
|
h: make([]Histogram, n),
|
|
m: New(minValue, maxValue, sigfigs),
|
|
}
|
|
|
|
for i := range w.h {
|
|
w.h[i] = *New(minValue, maxValue, sigfigs)
|
|
}
|
|
w.Rotate()
|
|
|
|
return &w
|
|
}
|
|
|
|
// Merge returns a histogram which includes the recorded values from all the
|
|
// sections of the window.
|
|
func (w *WindowedHistogram) Merge() *Histogram {
|
|
w.m.Reset()
|
|
for _, h := range w.h {
|
|
w.m.Merge(&h)
|
|
}
|
|
return w.m
|
|
}
|
|
|
|
// Rotate resets the oldest histogram and rotates it to be used as the current
|
|
// histogram.
|
|
func (w *WindowedHistogram) Rotate() {
|
|
w.idx++
|
|
w.Current = &w.h[w.idx%len(w.h)]
|
|
w.Current.Reset()
|
|
}
|