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statistics: add bench for MergeGlobalStatsTopNByConcurrency (#45998)
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| Original file line number | Diff line number | Diff line change |
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| // Copyright 2023 PingCAP, Inc. | ||
| // | ||
| // Licensed under the Apache License, Version 2.0 (the "License"); | ||
| // you may not use this file except in compliance with the License. | ||
| // You may obtain a copy of the License at | ||
| // | ||
| // http://www.apache.org/licenses/LICENSE-2.0 | ||
| // | ||
| // Unless required by applicable law or agreed to in writing, software | ||
| // distributed under the License is distributed on an "AS IS" BASIS, | ||
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| // See the License for the specific language governing permissions and | ||
| // limitations under the License. | ||
|
|
||
| package statistics_test | ||
|
|
||
| import ( | ||
| "fmt" | ||
| "testing" | ||
| "time" | ||
|
|
||
| "github.com/pingcap/tidb/parser/mysql" | ||
| "github.com/pingcap/tidb/sessionctx/stmtctx" | ||
| "github.com/pingcap/tidb/statistics" | ||
| "github.com/pingcap/tidb/statistics/handle" | ||
| "github.com/pingcap/tidb/types" | ||
| "github.com/pingcap/tidb/util/chunk" | ||
| "github.com/pingcap/tidb/util/codec" | ||
| "github.com/stretchr/testify/require" | ||
| ) | ||
|
|
||
| // cmd: go test -run=^$ -bench=BenchmarkMergePartTopN2GlobalTopNWithHists -benchmem github.com/pingcap/tidb/statistics | ||
| func benchmarkMergePartTopN2GlobalTopNWithHists(partitions int, b *testing.B) { | ||
| loc := time.UTC | ||
| sc := &stmtctx.StatementContext{TimeZone: loc} | ||
| version := 1 | ||
| isKilled := uint32(0) | ||
|
|
||
| // Prepare TopNs. | ||
| topNs := make([]*statistics.TopN, 0, partitions) | ||
| for i := 0; i < partitions; i++ { | ||
| // Construct TopN, should be key1 -> 2, key2 -> 2, key3 -> 3. | ||
| topN := statistics.NewTopN(3) | ||
| { | ||
| key1, err := codec.EncodeKey(sc, nil, types.NewIntDatum(1)) | ||
| require.NoError(b, err) | ||
| topN.AppendTopN(key1, 2) | ||
| key2, err := codec.EncodeKey(sc, nil, types.NewIntDatum(2)) | ||
| require.NoError(b, err) | ||
| topN.AppendTopN(key2, 2) | ||
| if i%2 == 0 { | ||
| key3, err := codec.EncodeKey(sc, nil, types.NewIntDatum(3)) | ||
| require.NoError(b, err) | ||
| topN.AppendTopN(key3, 3) | ||
| } | ||
| } | ||
| topNs = append(topNs, topN) | ||
| } | ||
|
|
||
| // Prepare Hists. | ||
| hists := make([]*statistics.Histogram, 0, partitions) | ||
| for i := 0; i < partitions; i++ { | ||
| // Construct Hist | ||
| h := statistics.NewHistogram(1, 10, 0, 0, types.NewFieldType(mysql.TypeTiny), chunk.InitialCapacity, 0) | ||
| h.Bounds.AppendInt64(0, 1) | ||
| h.Buckets = append(h.Buckets, statistics.Bucket{Repeat: 10, Count: 20}) | ||
| h.Bounds.AppendInt64(0, 2) | ||
| h.Buckets = append(h.Buckets, statistics.Bucket{Repeat: 10, Count: 30}) | ||
| h.Bounds.AppendInt64(0, 3) | ||
| h.Buckets = append(h.Buckets, statistics.Bucket{Repeat: 10, Count: 30}) | ||
| h.Bounds.AppendInt64(0, 4) | ||
| h.Buckets = append(h.Buckets, statistics.Bucket{Repeat: 10, Count: 40}) | ||
| hists = append(hists, h) | ||
| } | ||
|
|
||
| b.ResetTimer() | ||
| for i := 0; i < b.N; i++ { | ||
| // Benchmark merge 10 topN. | ||
| _, _, _, _ = statistics.MergePartTopN2GlobalTopN(loc, version, topNs, 10, hists, false, &isKilled) | ||
| } | ||
| } | ||
|
|
||
| // cmd: go test -run=^$ -bench=BenchmarkMergeGlobalStatsTopNByConcurrencyWithHists -benchmem github.com/pingcap/tidb/statistics | ||
| func benchmarkMergeGlobalStatsTopNByConcurrencyWithHists(partitions int, b *testing.B) { | ||
| loc := time.UTC | ||
| sc := &stmtctx.StatementContext{TimeZone: loc} | ||
| version := 1 | ||
| isKilled := uint32(0) | ||
|
|
||
| // Prepare TopNs. | ||
| topNs := make([]*statistics.TopN, 0, partitions) | ||
| for i := 0; i < partitions; i++ { | ||
| // Construct TopN, should be key1 -> 2, key2 -> 2, key3 -> 3. | ||
| topN := statistics.NewTopN(3) | ||
| { | ||
| key1, err := codec.EncodeKey(sc, nil, types.NewIntDatum(1)) | ||
| require.NoError(b, err) | ||
| topN.AppendTopN(key1, 2) | ||
| key2, err := codec.EncodeKey(sc, nil, types.NewIntDatum(2)) | ||
| require.NoError(b, err) | ||
| topN.AppendTopN(key2, 2) | ||
| if i%2 == 0 { | ||
| key3, err := codec.EncodeKey(sc, nil, types.NewIntDatum(3)) | ||
| require.NoError(b, err) | ||
| topN.AppendTopN(key3, 3) | ||
| } | ||
| } | ||
| topNs = append(topNs, topN) | ||
| } | ||
|
|
||
| // Prepare Hists. | ||
| hists := make([]*statistics.Histogram, 0, partitions) | ||
| for i := 0; i < partitions; i++ { | ||
| // Construct Hist | ||
| h := statistics.NewHistogram(1, 10, 0, 0, types.NewFieldType(mysql.TypeTiny), chunk.InitialCapacity, 0) | ||
| h.Bounds.AppendInt64(0, 1) | ||
| h.Buckets = append(h.Buckets, statistics.Bucket{Repeat: 10, Count: 20}) | ||
| h.Bounds.AppendInt64(0, 2) | ||
| h.Buckets = append(h.Buckets, statistics.Bucket{Repeat: 10, Count: 30}) | ||
| h.Bounds.AppendInt64(0, 3) | ||
| h.Buckets = append(h.Buckets, statistics.Bucket{Repeat: 10, Count: 30}) | ||
| h.Bounds.AppendInt64(0, 4) | ||
| h.Buckets = append(h.Buckets, statistics.Bucket{Repeat: 10, Count: 40}) | ||
| hists = append(hists, h) | ||
| } | ||
| wrapper := &statistics.StatsWrapper{ | ||
| AllTopN: topNs, | ||
| AllHg: hists, | ||
| } | ||
| const mergeConcurrency = 4 | ||
| batchSize := len(wrapper.AllTopN) / mergeConcurrency | ||
| if batchSize < 1 { | ||
| batchSize = 1 | ||
| } else if batchSize > handle.MaxPartitionMergeBatchSize { | ||
| batchSize = handle.MaxPartitionMergeBatchSize | ||
| } | ||
| b.ResetTimer() | ||
| for i := 0; i < b.N; i++ { | ||
| // Benchmark merge 10 topN. | ||
| _, _, _, _ = handle.MergeGlobalStatsTopNByConcurrency(mergeConcurrency, batchSize, wrapper, loc, version, 10, false, &isKilled) | ||
| } | ||
| } | ||
|
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||
| var benchmarkSizes = []int{100, 1000, 10000, 100000, 1000000, 10000000} | ||
| var benchmarkConcurrencySizes = []int{100, 1000, 10000, 100000, 1000000, 10000000, 100000000} | ||
|
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| func BenchmarkMergePartTopN2GlobalTopNWithHists(b *testing.B) { | ||
| for _, size := range benchmarkSizes { | ||
| b.Run(fmt.Sprintf("Size%d", size), func(b *testing.B) { | ||
| benchmarkMergePartTopN2GlobalTopNWithHists(size, b) | ||
| }) | ||
| } | ||
| } | ||
|
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| func BenchmarkMergeGlobalStatsTopNByConcurrencyWithHists(b *testing.B) { | ||
| for _, size := range benchmarkConcurrencySizes { | ||
| b.Run(fmt.Sprintf("Size%d", size), func(b *testing.B) { | ||
| benchmarkMergeGlobalStatsTopNByConcurrencyWithHists(size, b) | ||
| }) | ||
| } | ||
| } |
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