975 lines
23 KiB
Go
975 lines
23 KiB
Go
/*
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Copyright (c) 2012, Matt T. Proud
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All rights reserved.
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Use of this source code is governed by a BSD-style
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license that can be found in the LICENSE file.
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*/
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package metrics
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import (
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"github.com/matttproud/golang_instrumentation/maths"
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. "launchpad.net/gocheck"
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)
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func (s *S) TestEquallySizedBucketsFor(c *C) {
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h := EquallySizedBucketsFor(0, 10, 5)
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c.Assert(h, Not(IsNil))
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c.Check(h, HasLen, 5)
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c.Check(h[0], Equals, 0.0)
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c.Check(h[1], Equals, 2.0)
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c.Check(h[2], Equals, 4.0)
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c.Check(h[3], Equals, 6.0)
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c.Check(h[4], Equals, 8.0)
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}
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func (s *S) TestLogarithmicSizedBucketsFor(c *C) {
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h := LogarithmicSizedBucketsFor(0, 2048)
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c.Assert(h, Not(IsNil))
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c.Check(h, HasLen, 11)
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c.Check(h[0], Equals, 0.0)
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c.Check(h[1], Equals, 2.0)
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c.Check(h[2], Equals, 4.0)
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c.Check(h[3], Equals, 8.0)
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c.Check(h[4], Equals, 16.0)
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c.Check(h[5], Equals, 32.0)
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c.Check(h[6], Equals, 64.0)
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c.Check(h[7], Equals, 128.0)
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c.Check(h[8], Equals, 256.0)
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c.Check(h[9], Equals, 512.0)
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c.Check(h[10], Equals, 1024.0)
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}
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func (s *S) TestCreateHistogram(c *C) {
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hs := &HistogramSpecification{
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Starts: EquallySizedBucketsFor(0, 10, 5),
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BucketMaker: TallyingBucketBuilder,
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}
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h := CreateHistogram(hs)
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c.Assert(h, Not(IsNil))
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c.Check(h.Humanize(), Equals, "[Histogram { [0.000000, inf) = [TallyingBucket (Empty)], [2.000000, inf) = [TallyingBucket (Empty)], [4.000000, inf) = [TallyingBucket (Empty)], [6.000000, inf) = [TallyingBucket (Empty)], [8.000000, inf) = [TallyingBucket (Empty)], }]")
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h.Add(1)
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c.Check(h.Humanize(), Equals, "[Histogram { [0.000000, inf) = [TallyingBucket (1.000000, 1.000000); 1 items], [2.000000, inf) = [TallyingBucket (Empty)], [4.000000, inf) = [TallyingBucket (Empty)], [6.000000, inf) = [TallyingBucket (Empty)], [8.000000, inf) = [TallyingBucket (Empty)], }]")
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}
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func (s *S) TestBucketForPercentile(c *C) {
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hs := &HistogramSpecification{
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Starts: EquallySizedBucketsFor(0, 100, 100),
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BucketMaker: TallyingBucketBuilder,
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}
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h := CreateHistogram(hs)
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c.Assert(h, Not(IsNil))
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var bucket *Bucket = nil
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var subindex int = 0
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for i := 0.0; i < 1.0; i += 0.01 {
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bucket, subindex := h.bucketForPercentile(i)
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c.Assert(*bucket, Not(IsNil))
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c.Check(subindex, Equals, 0)
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}
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h.Add(1.0)
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bucket, subindex = h.bucketForPercentile(0)
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c.Assert(*bucket, Not(IsNil))
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c.Check(subindex, Equals, 0)
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c.Check((*bucket).Observations(), Equals, 1)
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bucket, subindex = h.bucketForPercentile(0.01)
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c.Assert(*bucket, Not(IsNil))
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c.Check(subindex, Equals, 0)
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c.Check((*bucket).Observations(), Equals, 1)
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bucket, subindex = h.bucketForPercentile(1.0)
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c.Assert(*bucket, Not(IsNil))
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c.Check(subindex, Equals, 0)
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c.Check((*bucket).Observations(), Equals, 1)
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for i := 2.0; i <= 100.0; i++ {
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h.Add(i)
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}
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bucket, subindex = h.bucketForPercentile(0.05)
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c.Assert(*bucket, Not(IsNil))
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c.Check(subindex, Equals, 0)
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c.Check((*bucket).Observations(), Equals, 1)
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for i := 0; i < 50; i++ {
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h.Add(50)
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h.Add(51)
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}
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bucket, subindex = h.bucketForPercentile(0.50)
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c.Assert(*bucket, Not(IsNil))
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c.Check(subindex, Equals, 50)
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c.Check((*bucket).Observations(), Equals, 51)
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bucket, subindex = h.bucketForPercentile(0.51)
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c.Assert(*bucket, Not(IsNil))
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c.Check(subindex, Equals, 1)
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c.Check((*bucket).Observations(), Equals, 51)
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}
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func (s *S) TestBucketForPercentileSingleton(c *C) {
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hs := &HistogramSpecification{
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Starts: EquallySizedBucketsFor(0, 3, 3),
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BucketMaker: TallyingBucketBuilder,
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}
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var h *Histogram = CreateHistogram(hs)
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c.Assert(h, Not(IsNil))
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var bucket *Bucket = nil
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var subindex int = 0
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for i := 0.0; i < 1.0; i += 0.01 {
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bucket, subindex := h.bucketForPercentile(i)
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c.Assert(*bucket, Not(IsNil))
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c.Check(subindex, Equals, 0)
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}
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h.Add(0.0)
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bucket, subindex = h.bucketForPercentile(1.0)
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c.Assert(*bucket, Not(IsNil))
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c.Check(subindex, Equals, 0)
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c.Check((*bucket).Observations(), Equals, 1)
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bucket, subindex = h.bucketForPercentile(0.5)
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c.Assert(*bucket, Not(IsNil))
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c.Check(subindex, Equals, 0)
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c.Check((*bucket).Observations(), Equals, 1)
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bucket, subindex = h.bucketForPercentile(0.01)
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c.Assert(*bucket, Not(IsNil))
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c.Check(subindex, Equals, 0)
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c.Check((*bucket).Observations(), Equals, 1)
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h = CreateHistogram(hs)
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c.Assert(h, Not(IsNil))
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for i := 0.0; i < 1.0; i += 0.01 {
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bucket, subindex := h.bucketForPercentile(i)
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c.Assert(*bucket, Not(IsNil))
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c.Check(subindex, Equals, 0)
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}
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h.Add(1.0)
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bucket, subindex = h.bucketForPercentile(1.0)
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c.Assert(*bucket, Not(IsNil))
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c.Check(subindex, Equals, 0)
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c.Check((*bucket).Observations(), Equals, 1)
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bucket, subindex = h.bucketForPercentile(0.5)
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c.Assert(*bucket, Not(IsNil))
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c.Check(subindex, Equals, 0)
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c.Check((*bucket).Observations(), Equals, 1)
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bucket, subindex = h.bucketForPercentile(0.01)
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c.Assert(*bucket, Not(IsNil))
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c.Check(subindex, Equals, 0)
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c.Check((*bucket).Observations(), Equals, 1)
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h = CreateHistogram(hs)
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c.Assert(h, Not(IsNil))
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for i := 0.0; i < 1.0; i += 0.01 {
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bucket, subindex := h.bucketForPercentile(i)
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c.Assert(*bucket, Not(IsNil))
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c.Check(subindex, Equals, 0)
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}
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h.Add(2.0)
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bucket, subindex = h.bucketForPercentile(1.0)
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c.Assert(*bucket, Not(IsNil))
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c.Check(subindex, Equals, 0)
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c.Check((*bucket).Observations(), Equals, 1)
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bucket, subindex = h.bucketForPercentile(0.5)
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c.Assert(*bucket, Not(IsNil))
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c.Check(subindex, Equals, 0)
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c.Check((*bucket).Observations(), Equals, 1)
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bucket, subindex = h.bucketForPercentile(0.01)
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c.Assert(*bucket, Not(IsNil))
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c.Check(subindex, Equals, 0)
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c.Check((*bucket).Observations(), Equals, 1)
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}
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func (s *S) TestBucketForPercentileDoubleInSingleBucket(c *C) {
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hs := &HistogramSpecification{
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Starts: EquallySizedBucketsFor(0, 3, 3),
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BucketMaker: TallyingBucketBuilder,
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}
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var h *Histogram = CreateHistogram(hs)
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c.Assert(h, Not(IsNil))
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var bucket *Bucket = nil
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var subindex int = 0
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for i := 0.0; i < 1.0; i += 0.01 {
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bucket, subindex := h.bucketForPercentile(i)
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c.Assert(*bucket, Not(IsNil))
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c.Check(subindex, Equals, 0)
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}
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h.Add(0.0)
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h.Add(0.0)
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bucket, subindex = h.bucketForPercentile(1.0)
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c.Assert(*bucket, Not(IsNil))
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c.Check(subindex, Equals, 1)
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c.Check((*bucket).Observations(), Equals, 2)
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bucket, subindex = h.bucketForPercentile(0.5)
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c.Assert(*bucket, Not(IsNil))
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c.Check(subindex, Equals, 0)
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c.Check((*bucket).Observations(), Equals, 2)
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bucket, subindex = h.bucketForPercentile(0.01)
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c.Assert(*bucket, Not(IsNil))
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c.Check(subindex, Equals, 0)
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c.Check((*bucket).Observations(), Equals, 2)
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h = CreateHistogram(hs)
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c.Assert(h, Not(IsNil))
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for i := 0.0; i < 1.0; i += 0.01 {
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bucket, subindex := h.bucketForPercentile(i)
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c.Assert(*bucket, Not(IsNil))
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c.Check(subindex, Equals, 0)
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}
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h.Add(1.0)
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h.Add(1.0)
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bucket, subindex = h.bucketForPercentile(1.0)
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c.Assert(*bucket, Not(IsNil))
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c.Check(subindex, Equals, 1)
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c.Check((*bucket).Observations(), Equals, 2)
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bucket, subindex = h.bucketForPercentile(0.5)
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c.Assert(*bucket, Not(IsNil))
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c.Check(subindex, Equals, 0)
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c.Check((*bucket).Observations(), Equals, 2)
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bucket, subindex = h.bucketForPercentile(0.01)
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c.Assert(*bucket, Not(IsNil))
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c.Check(subindex, Equals, 0)
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c.Check((*bucket).Observations(), Equals, 2)
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h = CreateHistogram(hs)
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c.Assert(h, Not(IsNil))
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for i := 0.0; i < 1.0; i += 0.01 {
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bucket, subindex := h.bucketForPercentile(i)
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c.Assert(*bucket, Not(IsNil))
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c.Check(subindex, Equals, 0)
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}
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h.Add(2.0)
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h.Add(2.0)
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bucket, subindex = h.bucketForPercentile(1.0)
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c.Assert(*bucket, Not(IsNil))
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c.Check(subindex, Equals, 1)
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c.Check((*bucket).Observations(), Equals, 2)
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bucket, subindex = h.bucketForPercentile(0.5)
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c.Assert(*bucket, Not(IsNil))
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c.Check(subindex, Equals, 0)
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c.Check((*bucket).Observations(), Equals, 2)
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bucket, subindex = h.bucketForPercentile(0.01)
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c.Assert(*bucket, Not(IsNil))
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c.Check(subindex, Equals, 0)
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c.Check((*bucket).Observations(), Equals, 2)
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}
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func (s *S) TestBucketForPercentileTripleInSingleBucket(c *C) {
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hs := &HistogramSpecification{
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Starts: EquallySizedBucketsFor(0, 3, 3),
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BucketMaker: TallyingBucketBuilder,
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}
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var h *Histogram = CreateHistogram(hs)
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c.Assert(h, Not(IsNil))
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var bucket *Bucket = nil
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var subindex int = 0
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for i := 0.0; i < 1.0; i += 0.01 {
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bucket, subindex := h.bucketForPercentile(i)
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c.Assert(*bucket, Not(IsNil))
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c.Check(subindex, Equals, 0)
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}
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h.Add(0.0)
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h.Add(0.0)
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h.Add(0.0)
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bucket, subindex = h.bucketForPercentile(1.0)
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c.Assert(*bucket, Not(IsNil))
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c.Check(subindex, Equals, 2)
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c.Check((*bucket).Observations(), Equals, 3)
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bucket, subindex = h.bucketForPercentile(0.67)
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c.Assert(*bucket, Not(IsNil))
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c.Check(subindex, Equals, 1)
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c.Check((*bucket).Observations(), Equals, 3)
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bucket, subindex = h.bucketForPercentile(2.0 / 3.0)
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c.Assert(*bucket, Not(IsNil))
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c.Check(subindex, Equals, 1)
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c.Check((*bucket).Observations(), Equals, 3)
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bucket, subindex = h.bucketForPercentile(0.5)
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c.Assert(*bucket, Not(IsNil))
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c.Check(subindex, Equals, 1)
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c.Check((*bucket).Observations(), Equals, 3)
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bucket, subindex = h.bucketForPercentile(1.0 / 3.0)
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c.Assert(*bucket, Not(IsNil))
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c.Check(subindex, Equals, 0)
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c.Check((*bucket).Observations(), Equals, 3)
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bucket, subindex = h.bucketForPercentile(0.01)
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c.Assert(*bucket, Not(IsNil))
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c.Check(subindex, Equals, 0)
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c.Check((*bucket).Observations(), Equals, 3)
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h = CreateHistogram(hs)
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h.Add(1.0)
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h.Add(1.0)
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h.Add(1.0)
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bucket, subindex = h.bucketForPercentile(1.0)
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c.Assert(*bucket, Not(IsNil))
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c.Check(subindex, Equals, 2)
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c.Check((*bucket).Observations(), Equals, 3)
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bucket, subindex = h.bucketForPercentile(0.67)
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c.Assert(*bucket, Not(IsNil))
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c.Check(subindex, Equals, 1)
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c.Check((*bucket).Observations(), Equals, 3)
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bucket, subindex = h.bucketForPercentile(2.0 / 3.0)
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c.Assert(*bucket, Not(IsNil))
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c.Check(subindex, Equals, 1)
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c.Check((*bucket).Observations(), Equals, 3)
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bucket, subindex = h.bucketForPercentile(0.5)
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c.Assert(*bucket, Not(IsNil))
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c.Check(subindex, Equals, 1)
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c.Check((*bucket).Observations(), Equals, 3)
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bucket, subindex = h.bucketForPercentile(1.0 / 3.0)
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c.Assert(*bucket, Not(IsNil))
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c.Check(subindex, Equals, 0)
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c.Check((*bucket).Observations(), Equals, 3)
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bucket, subindex = h.bucketForPercentile(0.01)
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c.Assert(*bucket, Not(IsNil))
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c.Check(subindex, Equals, 0)
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c.Check((*bucket).Observations(), Equals, 3)
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h = CreateHistogram(hs)
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h.Add(2.0)
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h.Add(2.0)
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h.Add(2.0)
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bucket, subindex = h.bucketForPercentile(1.0)
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c.Assert(*bucket, Not(IsNil))
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c.Check(subindex, Equals, 2)
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c.Check((*bucket).Observations(), Equals, 3)
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bucket, subindex = h.bucketForPercentile(0.67)
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c.Assert(*bucket, Not(IsNil))
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c.Check(subindex, Equals, 1)
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c.Check((*bucket).Observations(), Equals, 3)
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bucket, subindex = h.bucketForPercentile(2.0 / 3.0)
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c.Assert(*bucket, Not(IsNil))
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c.Check(subindex, Equals, 1)
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c.Check((*bucket).Observations(), Equals, 3)
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bucket, subindex = h.bucketForPercentile(0.5)
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c.Assert(*bucket, Not(IsNil))
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c.Check(subindex, Equals, 1)
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c.Check((*bucket).Observations(), Equals, 3)
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bucket, subindex = h.bucketForPercentile(1.0 / 3.0)
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c.Assert(*bucket, Not(IsNil))
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c.Check(subindex, Equals, 0)
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c.Check((*bucket).Observations(), Equals, 3)
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bucket, subindex = h.bucketForPercentile(0.01)
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c.Assert(*bucket, Not(IsNil))
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c.Check(subindex, Equals, 0)
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c.Check((*bucket).Observations(), Equals, 3)
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}
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func (s *S) TestBucketForPercentileTwoEqualAdjacencies(c *C) {
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hs := &HistogramSpecification{
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Starts: EquallySizedBucketsFor(0, 3, 3),
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BucketMaker: TallyingBucketBuilder,
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}
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var h *Histogram = CreateHistogram(hs)
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c.Assert(h, Not(IsNil))
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|
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var bucket *Bucket = nil
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var subindex int = 0
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|
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for i := 0.0; i < 1.0; i += 0.01 {
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bucket, subindex := h.bucketForPercentile(i)
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c.Assert(*bucket, Not(IsNil))
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c.Check(subindex, Equals, 0)
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}
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h.Add(0.0)
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h.Add(1.0)
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bucket, subindex = h.bucketForPercentile(1.0)
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c.Assert(*bucket, Not(IsNil))
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c.Check(subindex, Equals, 0)
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c.Check((*bucket).Observations(), Equals, 1)
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bucket, subindex = h.bucketForPercentile(0.67)
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|
c.Assert(*bucket, Not(IsNil))
|
|
c.Check(subindex, Equals, 0)
|
|
c.Check((*bucket).Observations(), Equals, 1)
|
|
|
|
bucket, subindex = h.bucketForPercentile(2.0 / 3.0)
|
|
|
|
c.Assert(*bucket, Not(IsNil))
|
|
c.Check(subindex, Equals, 0)
|
|
c.Check((*bucket).Observations(), Equals, 1)
|
|
|
|
bucket, subindex = h.bucketForPercentile(0.5)
|
|
|
|
c.Assert(*bucket, Not(IsNil))
|
|
c.Check(subindex, Equals, 0)
|
|
c.Check((*bucket).Observations(), Equals, 1)
|
|
|
|
bucket, subindex = h.bucketForPercentile(1.0 / 3.0)
|
|
|
|
c.Assert(*bucket, Not(IsNil))
|
|
c.Check(subindex, Equals, 0)
|
|
c.Check((*bucket).Observations(), Equals, 1)
|
|
|
|
bucket, subindex = h.bucketForPercentile(0.01)
|
|
|
|
c.Assert(*bucket, Not(IsNil))
|
|
c.Check(subindex, Equals, 0)
|
|
c.Check((*bucket).Observations(), Equals, 1)
|
|
|
|
h = CreateHistogram(hs)
|
|
|
|
h.Add(1.0)
|
|
h.Add(2.0)
|
|
|
|
bucket, subindex = h.bucketForPercentile(1.0)
|
|
|
|
c.Assert(*bucket, Not(IsNil))
|
|
c.Check(subindex, Equals, 0)
|
|
c.Check((*bucket).Observations(), Equals, 1)
|
|
|
|
bucket, subindex = h.bucketForPercentile(0.67)
|
|
|
|
c.Assert(*bucket, Not(IsNil))
|
|
c.Check(subindex, Equals, 0)
|
|
c.Check((*bucket).Observations(), Equals, 1)
|
|
|
|
bucket, subindex = h.bucketForPercentile(2.0 / 3.0)
|
|
|
|
c.Assert(*bucket, Not(IsNil))
|
|
c.Check(subindex, Equals, 0)
|
|
c.Check((*bucket).Observations(), Equals, 1)
|
|
|
|
bucket, subindex = h.bucketForPercentile(0.5)
|
|
|
|
c.Assert(*bucket, Not(IsNil))
|
|
c.Check(subindex, Equals, 0)
|
|
c.Check((*bucket).Observations(), Equals, 1)
|
|
|
|
bucket, subindex = h.bucketForPercentile(1.0 / 3.0)
|
|
|
|
c.Assert(*bucket, Not(IsNil))
|
|
c.Check(subindex, Equals, 0)
|
|
c.Check((*bucket).Observations(), Equals, 1)
|
|
|
|
bucket, subindex = h.bucketForPercentile(0.01)
|
|
|
|
c.Assert(*bucket, Not(IsNil))
|
|
c.Check(subindex, Equals, 0)
|
|
c.Check((*bucket).Observations(), Equals, 1)
|
|
}
|
|
|
|
func (s *S) TestBucketForPercentileTwoAdjacenciesUnequal(c *C) {
|
|
hs := &HistogramSpecification{
|
|
Starts: EquallySizedBucketsFor(0, 3, 3),
|
|
BucketMaker: TallyingBucketBuilder,
|
|
}
|
|
|
|
var h *Histogram = CreateHistogram(hs)
|
|
|
|
c.Assert(h, Not(IsNil))
|
|
|
|
var bucket *Bucket = nil
|
|
var subindex int = 0
|
|
|
|
for i := 0.0; i < 1.0; i += 0.01 {
|
|
bucket, subindex := h.bucketForPercentile(i)
|
|
|
|
c.Assert(*bucket, Not(IsNil))
|
|
c.Check(subindex, Equals, 0)
|
|
}
|
|
|
|
h.Add(0.0)
|
|
h.Add(0.0)
|
|
h.Add(1.0)
|
|
|
|
bucket, subindex = h.bucketForPercentile(1.0)
|
|
|
|
c.Assert(*bucket, Not(IsNil))
|
|
c.Check(subindex, Equals, 0)
|
|
c.Check((*bucket).Observations(), Equals, 1)
|
|
|
|
bucket, subindex = h.bucketForPercentile(0.67)
|
|
|
|
c.Assert(*bucket, Not(IsNil))
|
|
c.Check(subindex, Equals, 1)
|
|
c.Check((*bucket).Observations(), Equals, 2)
|
|
|
|
bucket, subindex = h.bucketForPercentile(2.0 / 3.0)
|
|
|
|
c.Assert(*bucket, Not(IsNil))
|
|
c.Check(subindex, Equals, 1)
|
|
c.Check((*bucket).Observations(), Equals, 2)
|
|
|
|
bucket, subindex = h.bucketForPercentile(0.5)
|
|
|
|
c.Assert(*bucket, Not(IsNil))
|
|
c.Check(subindex, Equals, 1)
|
|
c.Check((*bucket).Observations(), Equals, 2)
|
|
|
|
bucket, subindex = h.bucketForPercentile(1.0 / 3.0)
|
|
|
|
c.Assert(*bucket, Not(IsNil))
|
|
c.Check(subindex, Equals, 0)
|
|
c.Check((*bucket).Observations(), Equals, 2)
|
|
|
|
bucket, subindex = h.bucketForPercentile(0.01)
|
|
|
|
c.Assert(*bucket, Not(IsNil))
|
|
c.Check(subindex, Equals, 0)
|
|
c.Check((*bucket).Observations(), Equals, 2)
|
|
|
|
h = CreateHistogram(hs)
|
|
|
|
h.Add(0.0)
|
|
h.Add(1.0)
|
|
h.Add(1.0)
|
|
|
|
bucket, subindex = h.bucketForPercentile(1.0)
|
|
|
|
c.Assert(*bucket, Not(IsNil))
|
|
c.Check(subindex, Equals, 1)
|
|
c.Check((*bucket).Observations(), Equals, 2)
|
|
|
|
bucket, subindex = h.bucketForPercentile(0.67)
|
|
|
|
c.Assert(*bucket, Not(IsNil))
|
|
c.Check(subindex, Equals, 0)
|
|
c.Check((*bucket).Observations(), Equals, 2)
|
|
|
|
bucket, subindex = h.bucketForPercentile(2.0 / 3.0)
|
|
|
|
c.Assert(*bucket, Not(IsNil))
|
|
c.Check(subindex, Equals, 0)
|
|
c.Check((*bucket).Observations(), Equals, 2)
|
|
|
|
bucket, subindex = h.bucketForPercentile(0.5)
|
|
|
|
c.Assert(*bucket, Not(IsNil))
|
|
c.Check(subindex, Equals, 0)
|
|
c.Check((*bucket).Observations(), Equals, 2)
|
|
|
|
bucket, subindex = h.bucketForPercentile(1.0 / 3.0)
|
|
|
|
c.Assert(*bucket, Not(IsNil))
|
|
c.Check(subindex, Equals, 0)
|
|
c.Check((*bucket).Observations(), Equals, 1)
|
|
|
|
bucket, subindex = h.bucketForPercentile(0.01)
|
|
|
|
c.Assert(*bucket, Not(IsNil))
|
|
c.Check(subindex, Equals, 0)
|
|
c.Check((*bucket).Observations(), Equals, 1)
|
|
|
|
h = CreateHistogram(hs)
|
|
|
|
h.Add(1.0)
|
|
h.Add(1.0)
|
|
h.Add(2.0)
|
|
|
|
bucket, subindex = h.bucketForPercentile(1.0)
|
|
|
|
c.Assert(*bucket, Not(IsNil))
|
|
c.Check(subindex, Equals, 0)
|
|
c.Check((*bucket).Observations(), Equals, 1)
|
|
|
|
bucket, subindex = h.bucketForPercentile(0.67)
|
|
|
|
c.Assert(*bucket, Not(IsNil))
|
|
c.Check(subindex, Equals, 1)
|
|
c.Check((*bucket).Observations(), Equals, 2)
|
|
|
|
bucket, subindex = h.bucketForPercentile(2.0 / 3.0)
|
|
|
|
c.Assert(*bucket, Not(IsNil))
|
|
c.Check(subindex, Equals, 1)
|
|
c.Check((*bucket).Observations(), Equals, 2)
|
|
|
|
bucket, subindex = h.bucketForPercentile(0.5)
|
|
|
|
c.Assert(*bucket, Not(IsNil))
|
|
c.Check(subindex, Equals, 1)
|
|
c.Check((*bucket).Observations(), Equals, 2)
|
|
|
|
bucket, subindex = h.bucketForPercentile(1.0 / 3.0)
|
|
|
|
c.Assert(*bucket, Not(IsNil))
|
|
c.Check(subindex, Equals, 0)
|
|
c.Check((*bucket).Observations(), Equals, 2)
|
|
|
|
bucket, subindex = h.bucketForPercentile(0.01)
|
|
|
|
c.Assert(*bucket, Not(IsNil))
|
|
c.Check(subindex, Equals, 0)
|
|
c.Check((*bucket).Observations(), Equals, 2)
|
|
|
|
h = CreateHistogram(hs)
|
|
|
|
h.Add(1.0)
|
|
h.Add(2.0)
|
|
h.Add(2.0)
|
|
|
|
bucket, subindex = h.bucketForPercentile(1.0)
|
|
|
|
c.Assert(*bucket, Not(IsNil))
|
|
c.Check(subindex, Equals, 1)
|
|
c.Check((*bucket).Observations(), Equals, 2)
|
|
|
|
bucket, subindex = h.bucketForPercentile(0.67)
|
|
|
|
c.Assert(*bucket, Not(IsNil))
|
|
c.Check(subindex, Equals, 0)
|
|
c.Check((*bucket).Observations(), Equals, 2)
|
|
|
|
bucket, subindex = h.bucketForPercentile(2.0 / 3.0)
|
|
|
|
c.Assert(*bucket, Not(IsNil))
|
|
c.Check(subindex, Equals, 0)
|
|
c.Check((*bucket).Observations(), Equals, 2)
|
|
|
|
bucket, subindex = h.bucketForPercentile(0.5)
|
|
|
|
c.Assert(*bucket, Not(IsNil))
|
|
c.Check(subindex, Equals, 0)
|
|
c.Check((*bucket).Observations(), Equals, 2)
|
|
|
|
bucket, subindex = h.bucketForPercentile(1.0 / 3.0)
|
|
|
|
c.Assert(*bucket, Not(IsNil))
|
|
c.Check(subindex, Equals, 0)
|
|
c.Check((*bucket).Observations(), Equals, 1)
|
|
|
|
bucket, subindex = h.bucketForPercentile(0.01)
|
|
|
|
c.Assert(*bucket, Not(IsNil))
|
|
c.Check(subindex, Equals, 0)
|
|
c.Check((*bucket).Observations(), Equals, 1)
|
|
}
|
|
|
|
func (s *S) TestBucketForPercentileWithBinomialApproximation(c *C) {
|
|
hs := &HistogramSpecification{
|
|
Starts: EquallySizedBucketsFor(0, 5, 6),
|
|
BucketMaker: TallyingBucketBuilder,
|
|
}
|
|
|
|
c.Assert(hs, Not(IsNil))
|
|
|
|
h := CreateHistogram(hs)
|
|
|
|
c.Assert(h, Not(IsNil))
|
|
|
|
n := 5
|
|
p := 0.5
|
|
|
|
for k := 0; k < 6; k++ {
|
|
limit := 1000000.0 * maths.BinomialPDF(k, n, p)
|
|
for j := 0.0; j < limit; j++ {
|
|
h.Add(float64(k))
|
|
}
|
|
}
|
|
|
|
var bucket *Bucket = nil
|
|
var subindex int = 0
|
|
|
|
bucket, subindex = h.bucketForPercentile(0.0)
|
|
c.Assert(*bucket, Not(IsNil))
|
|
c.Check(subindex, Equals, 0)
|
|
c.Check((*bucket).Observations(), Equals, 31250)
|
|
|
|
bucket, subindex = h.bucketForPercentile(0.03125)
|
|
c.Assert(*bucket, Not(IsNil))
|
|
c.Check(subindex, Equals, 31249)
|
|
c.Check((*bucket).Observations(), Equals, 31250)
|
|
|
|
bucket, subindex = h.bucketForPercentile(0.1875)
|
|
c.Assert(*bucket, Not(IsNil))
|
|
c.Check(subindex, Equals, 156249)
|
|
c.Check((*bucket).Observations(), Equals, 156250)
|
|
|
|
bucket, subindex = h.bucketForPercentile(0.50)
|
|
c.Assert(*bucket, Not(IsNil))
|
|
c.Check(subindex, Equals, 312499)
|
|
c.Check((*bucket).Observations(), Equals, 312500)
|
|
|
|
bucket, subindex = h.bucketForPercentile(0.8125)
|
|
c.Assert(*bucket, Not(IsNil))
|
|
c.Check(subindex, Equals, 312499)
|
|
c.Check((*bucket).Observations(), Equals, 312500)
|
|
|
|
bucket, subindex = h.bucketForPercentile(0.96875)
|
|
c.Assert(*bucket, Not(IsNil))
|
|
c.Check(subindex, Equals, 156249)
|
|
c.Check((*bucket).Observations(), Equals, 156250)
|
|
|
|
bucket, subindex = h.bucketForPercentile(1.0)
|
|
c.Assert(*bucket, Not(IsNil))
|
|
c.Check(subindex, Equals, 31249)
|
|
c.Check((*bucket).Observations(), Equals, 31250)
|
|
}
|
|
|
|
func (s *S) TestBucketForPercentileWithUniform(c *C) {
|
|
hs := &HistogramSpecification{
|
|
Starts: EquallySizedBucketsFor(0, 100, 100),
|
|
BucketMaker: TallyingBucketBuilder,
|
|
}
|
|
|
|
c.Assert(hs, Not(IsNil))
|
|
|
|
h := CreateHistogram(hs)
|
|
|
|
c.Assert(h, Not(IsNil))
|
|
|
|
for i := 0.0; i <= 99.0; i++ {
|
|
h.Add(i)
|
|
}
|
|
|
|
for i := 0; i <= 99; i++ {
|
|
c.Check(h.bucketStarts[i], Equals, float64(i))
|
|
}
|
|
|
|
for i := 1; i <= 100; i++ {
|
|
c.Check(h.buckets[i-1].Observations(), Equals, 1)
|
|
}
|
|
|
|
var bucket *Bucket = nil
|
|
var subindex int = 0
|
|
|
|
bucket, subindex = h.bucketForPercentile(0.01)
|
|
c.Assert(*bucket, Not(IsNil))
|
|
c.Check(subindex, Equals, 0)
|
|
c.Check((*bucket).Observations(), Equals, 1)
|
|
|
|
bucket, subindex = h.bucketForPercentile(1.0)
|
|
c.Assert(*bucket, Not(IsNil))
|
|
c.Check(subindex, Equals, 0)
|
|
c.Check((*bucket).Observations(), Equals, 1)
|
|
}
|
|
|
|
func (s *S) TestHistogramPercentileUniform(c *C) {
|
|
hs := &HistogramSpecification{
|
|
Starts: EquallySizedBucketsFor(0, 100, 100),
|
|
BucketMaker: TallyingBucketBuilder,
|
|
}
|
|
|
|
h := CreateHistogram(hs)
|
|
|
|
c.Assert(h, Not(IsNil))
|
|
|
|
for i := 0.0; i <= 99.0; i++ {
|
|
h.Add(i)
|
|
}
|
|
|
|
c.Check(h.Percentile(0.01), Equals, 0.0)
|
|
c.Check(h.Percentile(0.49), Equals, 48.0)
|
|
c.Check(h.Percentile(0.50), Equals, 49.0)
|
|
c.Check(h.Percentile(0.51), Equals, 50.0)
|
|
c.Check(h.Percentile(1.0), Equals, 99.0)
|
|
}
|
|
|
|
func (s *S) TestHistogramPercentileBinomialApproximation(c *C) {
|
|
hs := &HistogramSpecification{
|
|
Starts: EquallySizedBucketsFor(0, 5, 6),
|
|
BucketMaker: TallyingBucketBuilder,
|
|
}
|
|
|
|
h := CreateHistogram(hs)
|
|
|
|
c.Assert(h, Not(IsNil))
|
|
|
|
n := 5
|
|
p := 0.5
|
|
|
|
for k := 0; k < 6; k++ {
|
|
limit := 1000000.0 * maths.BinomialPDF(k, n, p)
|
|
for j := 0.0; j < limit; j++ {
|
|
h.Add(float64(k))
|
|
}
|
|
}
|
|
|
|
c.Check(h.Percentile(0.0), Equals, 0.0)
|
|
c.Check(h.Percentile(0.03125), Equals, 0.0)
|
|
c.Check(h.Percentile(0.1875), Equals, 1.0)
|
|
c.Check(h.Percentile(0.5), Equals, 2.0)
|
|
c.Check(h.Percentile(0.8125), Equals, 3.0)
|
|
c.Check(h.Percentile(0.96875), Equals, 4.0)
|
|
c.Check(h.Percentile(1.0), Equals, 5.0)
|
|
}
|
|
|
|
func (s *S) TestHistogramMarshallable(c *C) {
|
|
hs := &HistogramSpecification{
|
|
Starts: EquallySizedBucketsFor(0, 5, 6),
|
|
BucketMaker: TallyingBucketBuilder,
|
|
ReportablePercentiles: []float64{0.03125, 0.1875, 0.5, 0.8125, 0.96875, 1.0},
|
|
}
|
|
|
|
h := CreateHistogram(hs)
|
|
|
|
c.Assert(h, Not(IsNil))
|
|
|
|
n := 5
|
|
p := 0.5
|
|
|
|
for k := 0; k < 6; k++ {
|
|
limit := 1000000.0 * maths.BinomialPDF(k, n, p)
|
|
for j := 0.0; j < limit; j++ {
|
|
h.Add(float64(k))
|
|
}
|
|
}
|
|
|
|
m := h.Marshallable()
|
|
|
|
c.Assert(m, Not(IsNil))
|
|
c.Check(m, HasLen, 2)
|
|
c.Check(m["type"], Equals, "histogram")
|
|
|
|
var v map[string]interface{} = m["value"].(map[string]interface{})
|
|
|
|
c.Assert(v, Not(IsNil))
|
|
|
|
c.Check(v, HasLen, 6)
|
|
c.Check(v["0.031250"], Equals, "0.000000")
|
|
c.Check(v["0.187500"], Equals, "1.000000")
|
|
c.Check(v["0.500000"], Equals, "2.000000")
|
|
c.Check(v["0.812500"], Equals, "3.000000")
|
|
c.Check(v["0.968750"], Equals, "4.000000")
|
|
c.Check(v["1.000000"], Equals, "5.000000")
|
|
}
|
|
|
|
func (s *S) TestHistogramAsMetric(c *C) {
|
|
hs := &HistogramSpecification{
|
|
Starts: EquallySizedBucketsFor(0, 5, 6),
|
|
BucketMaker: TallyingBucketBuilder,
|
|
ReportablePercentiles: []float64{0.0, 0.03125, 0.1875, 0.5, 0.8125, 0.96875, 1.0},
|
|
}
|
|
|
|
h := CreateHistogram(hs)
|
|
|
|
var metric Metric = h
|
|
|
|
c.Assert(metric, Not(IsNil))
|
|
}
|