297 lines
7.3 KiB
Go
297 lines
7.3 KiB
Go
package main
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import (
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"encoding/json"
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"flag"
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"fmt"
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"math"
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"os"
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"strings"
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"text/tabwriter"
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"time"
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"github.com/go-kit/kit/log/term"
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metrics "github.com/rcrowley/go-metrics"
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"github.com/tendermint/tendermint/libs/log"
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tmrpc "github.com/tendermint/tendermint/rpc/client"
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)
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var logger = log.NewNopLogger()
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type statistics struct {
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TxsThroughput metrics.Histogram `json:"txs_per_sec"`
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BlocksThroughput metrics.Histogram `json:"blocks_per_sec"`
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}
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func main() {
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var duration, txsRate, connections, txSize int
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var verbose bool
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var outputFormat, broadcastTxMethod string
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flagSet := flag.NewFlagSet("tm-bench", flag.ExitOnError)
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flagSet.IntVar(&connections, "c", 1, "Connections to keep open per endpoint")
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flagSet.IntVar(&duration, "T", 10, "Exit after the specified amount of time in seconds")
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flagSet.IntVar(&txsRate, "r", 1000, "Txs per second to send in a connection")
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flagSet.IntVar(&txSize, "s", 250, "The size of a transaction in bytes.")
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flagSet.StringVar(&outputFormat, "output-format", "plain", "Output format: plain or json")
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flagSet.StringVar(&broadcastTxMethod, "broadcast-tx-method", "async", "Broadcast method: async (no guarantees; fastest), sync (ensures tx is checked) or commit (ensures tx is checked and committed; slowest)")
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flagSet.BoolVar(&verbose, "v", false, "Verbose output")
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flagSet.Usage = func() {
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fmt.Println(`Tendermint blockchain benchmarking tool.
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Usage:
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tm-bench [-c 1] [-T 10] [-r 1000] [endpoints] [-output-format <plain|json> [-broadcast-tx-method <async|sync|commit>]]
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Examples:
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tm-bench localhost:26657`)
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fmt.Println("Flags:")
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flagSet.PrintDefaults()
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}
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flagSet.Parse(os.Args[1:])
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if flagSet.NArg() == 0 {
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flagSet.Usage()
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os.Exit(1)
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}
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if verbose {
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if outputFormat == "json" {
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fmt.Fprintln(os.Stderr, "Verbose mode not supported with json output.")
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os.Exit(1)
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}
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// Color errors red
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colorFn := func(keyvals ...interface{}) term.FgBgColor {
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for i := 1; i < len(keyvals); i += 2 {
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if _, ok := keyvals[i].(error); ok {
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return term.FgBgColor{Fg: term.White, Bg: term.Red}
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}
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}
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return term.FgBgColor{}
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}
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logger = log.NewTMLoggerWithColorFn(log.NewSyncWriter(os.Stdout), colorFn)
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fmt.Printf("Running %ds test @ %s\n", duration, flagSet.Arg(0))
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}
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if broadcastTxMethod != "async" &&
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broadcastTxMethod != "sync" &&
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broadcastTxMethod != "commit" {
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fmt.Fprintln(
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os.Stderr,
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"broadcast-tx-method should be either 'sync', 'async' or 'commit'.",
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)
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os.Exit(1)
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}
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var (
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endpoints = strings.Split(flagSet.Arg(0), ",")
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client = tmrpc.NewHTTP(endpoints[0], "/websocket")
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initialHeight = latestBlockHeight(client)
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)
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logger.Info("Latest block height", "h", initialHeight)
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// record time start
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timeStart := time.Now()
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logger.Info("Time started", "t", timeStart)
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transacters := startTransacters(
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endpoints,
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connections,
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txsRate,
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txSize,
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"broadcast_tx_"+broadcastTxMethod,
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)
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endTime := time.Duration(duration) * time.Second
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<-time.After(endTime)
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for i, t := range transacters {
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t.Stop()
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numCrashes := countCrashes(t.connsBroken)
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if numCrashes != 0 {
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fmt.Printf("%d connections crashed on transacter #%d\n", numCrashes, i)
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}
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}
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timeStop := time.Now()
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logger.Info("Time stopped", "t", timeStop)
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stats, err := calculateStatistics(
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client,
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initialHeight,
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timeStart,
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timeStop,
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duration,
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)
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if err != nil {
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fmt.Fprintln(os.Stderr, err)
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os.Exit(1)
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}
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printStatistics(stats, outputFormat)
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}
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func latestBlockHeight(client tmrpc.Client) int64 {
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status, err := client.Status()
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if err != nil {
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fmt.Fprintln(os.Stderr, err)
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os.Exit(1)
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}
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return status.SyncInfo.LatestBlockHeight
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}
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func countCrashes(crashes []bool) int {
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count := 0
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for i := 0; i < len(crashes); i++ {
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if crashes[i] {
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count++
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}
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}
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return count
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}
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// calculateStatistics calculates the tx / second, and blocks / second based
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// off of the number the transactions and number of blocks that occurred from
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// the start block, and the end time.
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func calculateStatistics(
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client tmrpc.Client,
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minHeight int64,
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timeStart, timeStop time.Time,
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duration int,
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) (*statistics, error) {
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stats := &statistics{
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BlocksThroughput: metrics.NewHistogram(metrics.NewUniformSample(1000)),
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TxsThroughput: metrics.NewHistogram(metrics.NewUniformSample(1000)),
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}
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// get blocks between minHeight and last height
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// This returns max(minHeight,(last_height - 20)) to last_height
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info, err := client.BlockchainInfo(minHeight, 0)
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if err != nil {
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return nil, err
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}
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var (
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blockMetas = info.BlockMetas
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lastHeight = info.LastHeight
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diff = lastHeight - minHeight
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offset = len(blockMetas)
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)
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for offset < int(diff) {
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// get blocks between minHeight and last height
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info, err := client.BlockchainInfo(minHeight, lastHeight-int64(offset))
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if err != nil {
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return nil, err
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}
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blockMetas = append(blockMetas, info.BlockMetas...)
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offset = len(blockMetas)
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}
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var (
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numBlocksPerSec = make(map[int64]int64)
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numTxsPerSec = make(map[int64]int64)
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)
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// because during some seconds blocks won't be created...
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for i := int64(0); i < int64(duration); i++ {
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numBlocksPerSec[i] = 0
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numTxsPerSec[i] = 0
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}
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// iterates from max height to min height
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for _, blockMeta := range blockMetas {
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// check if block was created after timeStart
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if blockMeta.Header.Time.Before(timeStart) {
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break
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}
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// check if block was created before timeStop
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if blockMeta.Header.Time.After(timeStop) {
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continue
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}
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sec := secondsSinceTimeStart(timeStart, blockMeta.Header.Time)
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// increase number of blocks for that second
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numBlocksPerSec[sec]++
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// increase number of txs for that second
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numTxsPerSec[sec] += blockMeta.Header.NumTxs
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}
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for _, n := range numBlocksPerSec {
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stats.BlocksThroughput.Update(n)
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}
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for _, n := range numTxsPerSec {
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stats.TxsThroughput.Update(n)
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}
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return stats, nil
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}
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func secondsSinceTimeStart(timeStart, timePassed time.Time) int64 {
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return int64(math.Round(timePassed.Sub(timeStart).Seconds()))
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}
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func startTransacters(
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endpoints []string,
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connections,
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txsRate int,
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txSize int,
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broadcastTxMethod string,
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) []*transacter {
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transacters := make([]*transacter, len(endpoints))
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for i, e := range endpoints {
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t := newTransacter(e, connections, txsRate, txSize, broadcastTxMethod)
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t.SetLogger(logger)
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if err := t.Start(); err != nil {
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fmt.Fprintln(os.Stderr, err)
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os.Exit(1)
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}
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transacters[i] = t
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}
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return transacters
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}
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func printStatistics(stats *statistics, outputFormat string) {
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if outputFormat == "json" {
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result, err := json.Marshal(struct {
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TxsThroughput float64 `json:"txs_per_sec_avg"`
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BlocksThroughput float64 `json:"blocks_per_sec_avg"`
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}{stats.TxsThroughput.Mean(), stats.BlocksThroughput.Mean()})
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if err != nil {
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fmt.Fprintln(os.Stderr, err)
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os.Exit(1)
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}
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fmt.Println(string(result))
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} else {
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w := tabwriter.NewWriter(os.Stdout, 0, 0, 5, ' ', 0)
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fmt.Fprintln(w, "Stats\tAvg\tStdDev\tMax\tTotal\t")
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fmt.Fprintln(
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w,
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fmt.Sprintf(
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"Txs/sec\t%.0f\t%.0f\t%d\t%d\t",
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stats.TxsThroughput.Mean(),
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stats.TxsThroughput.StdDev(),
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stats.TxsThroughput.Max(),
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stats.TxsThroughput.Sum(),
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),
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)
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fmt.Fprintln(
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w,
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fmt.Sprintf("Blocks/sec\t%.3f\t%.3f\t%d\t%d\t",
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stats.BlocksThroughput.Mean(),
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stats.BlocksThroughput.StdDev(),
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stats.BlocksThroughput.Max(),
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stats.BlocksThroughput.Sum(),
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),
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)
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w.Flush()
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}
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}
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