mirror of https://github.com/prometheus/prometheus
339 lines
6.8 KiB
Go
339 lines
6.8 KiB
Go
package main
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import (
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"flag"
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"fmt"
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"io"
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"io/ioutil"
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"net/http"
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_ "net/http/pprof"
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"os"
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"path/filepath"
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"runtime"
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"runtime/pprof"
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"sync"
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"time"
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"unsafe"
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"github.com/fabxc/tsdb"
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"github.com/fabxc/tsdb/labels"
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promlabels "github.com/prometheus/prometheus/pkg/labels"
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"github.com/prometheus/prometheus/pkg/textparse"
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"github.com/spf13/cobra"
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)
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func main() {
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// Start HTTP server for pprof endpoint.
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go http.ListenAndServe(":9999", nil)
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root := &cobra.Command{
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Use: "tsdb",
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Short: "CLI tool for tsdb",
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}
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root.AddCommand(
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NewBenchCommand(),
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)
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flag.CommandLine.Set("log.level", "debug")
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root.Execute()
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}
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func NewBenchCommand() *cobra.Command {
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c := &cobra.Command{
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Use: "bench",
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Short: "run benchmarks",
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}
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c.AddCommand(NewBenchWriteCommand())
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return c
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}
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type writeBenchmark struct {
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outPath string
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cleanup bool
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numMetrics int
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storage *tsdb.DB
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cpuprof *os.File
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memprof *os.File
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blockprof *os.File
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}
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func NewBenchWriteCommand() *cobra.Command {
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var wb writeBenchmark
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c := &cobra.Command{
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Use: "write <file>",
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Short: "run a write performance benchmark",
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Run: wb.run,
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}
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c.PersistentFlags().StringVar(&wb.outPath, "out", "benchout/", "set the output path")
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c.PersistentFlags().IntVar(&wb.numMetrics, "metrics", 10000, "number of metrics to read")
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return c
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}
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func (b *writeBenchmark) run(cmd *cobra.Command, args []string) {
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if len(args) != 1 {
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exitWithError(fmt.Errorf("missing file argument"))
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}
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if b.outPath == "" {
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dir, err := ioutil.TempDir("", "tsdb_bench")
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if err != nil {
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exitWithError(err)
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}
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b.outPath = dir
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b.cleanup = true
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}
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if err := os.RemoveAll(b.outPath); err != nil {
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exitWithError(err)
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}
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if err := os.MkdirAll(b.outPath, 0777); err != nil {
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exitWithError(err)
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}
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dir := filepath.Join(b.outPath, "storage")
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st, err := tsdb.Open(dir, nil, nil, &tsdb.Options{
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WALFlushInterval: 200 * time.Millisecond,
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RetentionDuration: 2 * 24 * 60 * 60 * 1000, // 1 days in milliseconds
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MinBlockDuration: 3 * 60 * 60 * 1000, // 2 hours in milliseconds
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MaxBlockDuration: 27 * 60 * 60 * 1000, // 1 days in milliseconds
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AppendableBlocks: 2,
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})
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if err != nil {
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exitWithError(err)
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}
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b.storage = st
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var metrics []labels.Labels
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measureTime("readData", func() {
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f, err := os.Open(args[0])
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if err != nil {
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exitWithError(err)
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}
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defer f.Close()
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metrics, err = readPrometheusLabels(f, b.numMetrics)
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if err != nil {
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exitWithError(err)
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}
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})
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defer func() {
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reportSize(dir)
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if b.cleanup {
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os.RemoveAll(b.outPath)
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}
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}()
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var total uint64
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dur := measureTime("ingestScrapes", func() {
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b.startProfiling()
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total, err = b.ingestScrapes(metrics, 3000)
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if err != nil {
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exitWithError(err)
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}
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})
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fmt.Println(" > total samples:", total)
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fmt.Println(" > samples/sec:", float64(total)/dur.Seconds())
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measureTime("stopStorage", func() {
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if err := b.storage.Close(); err != nil {
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exitWithError(err)
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}
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b.stopProfiling()
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})
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}
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func (b *writeBenchmark) ingestScrapes(lbls []labels.Labels, scrapeCount int) (uint64, error) {
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var mu sync.Mutex
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var total uint64
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for i := 0; i < scrapeCount; i += 100 {
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var wg sync.WaitGroup
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lbls := lbls
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for len(lbls) > 0 {
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l := 1000
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if len(lbls) < 1000 {
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l = len(lbls)
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}
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batch := lbls[:l]
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lbls = lbls[l:]
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wg.Add(1)
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go func() {
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n, err := b.ingestScrapesShard(batch, 100, int64(30000*i))
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if err != nil {
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// exitWithError(err)
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fmt.Println(" err", err)
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}
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mu.Lock()
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total += n
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mu.Unlock()
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wg.Done()
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}()
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}
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wg.Wait()
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}
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return total, nil
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}
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func (b *writeBenchmark) ingestScrapesShard(metrics []labels.Labels, scrapeCount int, baset int64) (uint64, error) {
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ts := baset
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type sample struct {
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labels labels.Labels
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value int64
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ref *uint64
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}
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scrape := make([]*sample, 0, len(metrics))
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for _, m := range metrics {
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scrape = append(scrape, &sample{
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labels: m,
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value: 123456789,
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})
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}
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total := uint64(0)
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for i := 0; i < scrapeCount; i++ {
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app := b.storage.Appender()
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ts += int64(30000)
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for _, s := range scrape {
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s.value += 1000
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if s.ref == nil {
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ref, err := app.Add(s.labels, ts, float64(s.value))
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if err != nil {
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panic(err)
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}
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s.ref = &ref
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} else if err := app.AddFast(*s.ref, ts, float64(s.value)); err != nil {
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if err.Error() != "not found" {
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panic(err)
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}
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ref, err := app.Add(s.labels, ts, float64(s.value))
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if err != nil {
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panic(err)
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}
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s.ref = &ref
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}
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total++
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}
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if err := app.Commit(); err != nil {
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return total, err
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}
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}
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return total, nil
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}
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func (b *writeBenchmark) startProfiling() {
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var err error
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// Start CPU profiling.
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b.cpuprof, err = os.Create(filepath.Join(b.outPath, "cpu.prof"))
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if err != nil {
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exitWithError(fmt.Errorf("bench: could not create cpu profile: %v\n", err))
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}
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pprof.StartCPUProfile(b.cpuprof)
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// Start memory profiling.
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b.memprof, err = os.Create(filepath.Join(b.outPath, "mem.prof"))
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if err != nil {
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exitWithError(fmt.Errorf("bench: could not create memory profile: %v\n", err))
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}
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runtime.MemProfileRate = 4096
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// Start fatal profiling.
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b.blockprof, err = os.Create(filepath.Join(b.outPath, "block.prof"))
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if err != nil {
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exitWithError(fmt.Errorf("bench: could not create block profile: %v\n", err))
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}
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runtime.SetBlockProfileRate(1)
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}
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func (b *writeBenchmark) stopProfiling() {
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if b.cpuprof != nil {
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pprof.StopCPUProfile()
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b.cpuprof.Close()
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b.cpuprof = nil
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}
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if b.memprof != nil {
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pprof.Lookup("heap").WriteTo(b.memprof, 0)
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b.memprof.Close()
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b.memprof = nil
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}
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if b.blockprof != nil {
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pprof.Lookup("block").WriteTo(b.blockprof, 0)
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b.blockprof.Close()
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b.blockprof = nil
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runtime.SetBlockProfileRate(0)
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}
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}
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func reportSize(dir string) {
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err := filepath.Walk(dir, func(path string, info os.FileInfo, err error) error {
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if err != nil || path == dir {
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return err
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}
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if info.Size() < 10*1024*1024 {
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return nil
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}
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fmt.Printf(" > file=%s size=%.04fGiB\n", path[len(dir):], float64(info.Size())/1024/1024/1024)
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return nil
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})
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if err != nil {
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exitWithError(err)
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}
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}
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func measureTime(stage string, f func()) time.Duration {
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fmt.Printf(">> start stage=%s\n", stage)
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start := time.Now()
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f()
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fmt.Printf(">> completed stage=%s duration=%s\n", stage, time.Since(start))
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return time.Since(start)
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}
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func readPrometheusLabels(r io.Reader, n int) ([]labels.Labels, error) {
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b, err := ioutil.ReadAll(r)
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if err != nil {
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return nil, err
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}
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p := textparse.New(b)
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i := 0
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var mets []labels.Labels
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hashes := map[uint64]struct{}{}
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for p.Next() && i < n {
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m := make(labels.Labels, 0, 10)
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p.Metric((*promlabels.Labels)(unsafe.Pointer(&m)))
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h := m.Hash()
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if _, ok := hashes[h]; ok {
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continue
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}
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mets = append(mets, m)
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hashes[h] = struct{}{}
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i++
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}
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return mets, p.Err()
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}
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func exitWithError(err error) {
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fmt.Fprintln(os.Stderr, err)
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os.Exit(1)
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}
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