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630bcb494b
Previously, we had one “polymorphous” `sample` type in the `storage` package. This commit breaks it up into `fSample`, `hSample`, and `fhSample`, each still implementing the `tsdbutil.Sample` interface. This reduces allocations in `sampleRing.Add` but inflicts the penalty of the interface wrapper, which makes things worse in total. This commit therefore just demonstrates the step taken. The next commit will tackle the interface overhead problem. Signed-off-by: beorn7 <beorn@grafana.com>
90 lines
2.6 KiB
Go
90 lines
2.6 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/tsdb/chunkenc"
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)
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func TestMemoizedSeriesIterator(t *testing.T) {
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// TODO(beorn7): Include histograms in testing.
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var it *MemoizedSeriesIterator
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sampleEq := func(ets int64, ev float64) {
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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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}
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prevSampleEq := func(ets int64, ev float64, eok bool) {
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ts, v, _, _, 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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require.Equal(t, ev, v, "value mismatch")
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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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}), 2)
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require.Equal(t, it.Seek(-123), chunkenc.ValFloat, "seek failed")
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sampleEq(1, 2)
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prevSampleEq(0, 0, false)
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require.Equal(t, it.Next(), chunkenc.ValFloat, "next failed")
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sampleEq(2, 3)
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prevSampleEq(1, 2, true)
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require.Equal(t, it.Next(), chunkenc.ValFloat, "next failed")
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require.Equal(t, it.Next(), chunkenc.ValFloat, "next failed")
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require.Equal(t, it.Next(), chunkenc.ValFloat, "next failed")
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sampleEq(5, 6)
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prevSampleEq(4, 5, true)
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require.Equal(t, it.Seek(5), chunkenc.ValFloat, "seek failed")
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sampleEq(5, 6)
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prevSampleEq(4, 5, true)
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require.Equal(t, it.Seek(101), chunkenc.ValFloat, "seek failed")
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sampleEq(101, 10)
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prevSampleEq(100, 9, true)
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require.Equal(t, it.Next(), chunkenc.ValNone, "next succeeded unexpectedly")
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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 {
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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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