mirror of
https://github.com/prometheus/prometheus.git
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120 lines
4 KiB
Go
120 lines
4 KiB
Go
// Copyright 2021 The Prometheus Authors
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package storage
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import (
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"testing"
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"github.com/stretchr/testify/require"
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"github.com/prometheus/prometheus/model/histogram"
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"github.com/prometheus/prometheus/tsdb/chunkenc"
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"github.com/prometheus/prometheus/tsdb/tsdbutil"
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)
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func TestMemoizedSeriesIterator(t *testing.T) {
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var it *MemoizedSeriesIterator
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sampleEq := func(ets int64, ev float64, efh *histogram.FloatHistogram) {
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if efh == nil {
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ts, v := it.At()
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require.Equal(t, ets, ts, "timestamp mismatch")
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require.Equal(t, ev, v, "value mismatch")
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} else {
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ts, fh := it.AtFloatHistogram()
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require.Equal(t, ets, ts, "timestamp mismatch")
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require.Equal(t, efh, fh, "histogram mismatch")
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}
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}
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prevSampleEq := func(ets int64, ev float64, efh *histogram.FloatHistogram, eok bool) {
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ts, v, fh, ok := it.PeekPrev()
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require.Equal(t, eok, ok, "exist mismatch")
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require.Equal(t, ets, ts, "timestamp mismatch")
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if efh == nil {
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require.Equal(t, ev, v, "value mismatch")
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} else {
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require.Equal(t, efh, fh, "histogram mismatch")
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}
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}
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it = NewMemoizedIterator(NewListSeriesIterator(samples{
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fSample{t: 1, f: 2},
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fSample{t: 2, f: 3},
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fSample{t: 3, f: 4},
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fSample{t: 4, f: 5},
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fSample{t: 5, f: 6},
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fSample{t: 99, f: 8},
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fSample{t: 100, f: 9},
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fSample{t: 101, f: 10},
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hSample{t: 102, h: tsdbutil.GenerateTestHistogram(0)},
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hSample{t: 103, h: tsdbutil.GenerateTestHistogram(1)},
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fhSample{t: 104, fh: tsdbutil.GenerateTestFloatHistogram(2)},
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fhSample{t: 199, fh: tsdbutil.GenerateTestFloatHistogram(3)},
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hSample{t: 200, h: tsdbutil.GenerateTestHistogram(4)},
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fhSample{t: 299, fh: tsdbutil.GenerateTestFloatHistogram(5)},
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fSample{t: 300, f: 11},
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hSample{t: 399, h: tsdbutil.GenerateTestHistogram(6)},
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fSample{t: 400, f: 12},
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}), 2)
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require.Equal(t, it.Seek(-123), chunkenc.ValFloat, "seek failed")
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sampleEq(1, 2, nil)
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prevSampleEq(0, 0, nil, false)
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require.Equal(t, it.Seek(5), chunkenc.ValFloat, "seek failed")
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sampleEq(5, 6, nil)
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prevSampleEq(4, 5, nil, true)
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// Seek to a histogram sample with a previous float sample.
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require.Equal(t, it.Seek(102), chunkenc.ValFloatHistogram, "seek failed")
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sampleEq(102, 10, tsdbutil.GenerateTestFloatHistogram(0))
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prevSampleEq(101, 10, nil, true)
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// Attempt to seek backwards (no-op).
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require.Equal(t, it.Seek(50), chunkenc.ValFloatHistogram, "seek failed")
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sampleEq(102, 10, tsdbutil.GenerateTestFloatHistogram(0))
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prevSampleEq(101, 10, nil, true)
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// Seek to a float histogram sample with a previous histogram sample.
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require.Equal(t, it.Seek(104), chunkenc.ValFloatHistogram, "seek failed")
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sampleEq(104, 0, tsdbutil.GenerateTestFloatHistogram(2))
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prevSampleEq(103, 0, tsdbutil.GenerateTestFloatHistogram(1), true)
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// Seek to a float sample with a previous float histogram sample.
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require.Equal(t, chunkenc.ValFloat, it.Seek(300), "seek failed")
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sampleEq(300, 11, nil)
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prevSampleEq(299, 0, tsdbutil.GenerateTestFloatHistogram(5), true)
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// Seek to a float sample with a previous histogram sample.
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require.Equal(t, chunkenc.ValFloat, it.Seek(400), "seek failed")
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sampleEq(400, 12, nil)
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prevSampleEq(399, 0, tsdbutil.GenerateTestFloatHistogram(6), true)
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require.Equal(t, it.Seek(1024), chunkenc.ValNone, "seek succeeded unexpectedly")
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}
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func BenchmarkMemoizedSeriesIterator(b *testing.B) {
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// Simulate a 5 minute rate.
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it := NewMemoizedIterator(newFakeSeriesIterator(int64(b.N), 30), 5*60)
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b.SetBytes(16)
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b.ReportAllocs()
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b.ResetTimer()
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for it.Next() != chunkenc.ValNone { // nolint:revive
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// Scan everything.
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}
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require.NoError(b, it.Err())
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}
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