benchmark: add txn-put benchmark

Submits multiple put ops in a single txn.

tools/benchmark/cmd/txn_put.go

@@ -0,0 +1,108 @@
+// Copyright 2017 The etcd Authors
+//
+// 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 cmd
+
+import (
+	"encoding/binary"
+	"fmt"
+	"math"
+	"os"
+	"time"
+
+	v3 "github.com/coreos/etcd/clientv3"
+	"github.com/coreos/etcd/pkg/report"
+
+	"github.com/spf13/cobra"
+	"golang.org/x/net/context"
+	"golang.org/x/time/rate"
+	"gopkg.in/cheggaaa/pb.v1"
+)
+
+// txnPutCmd represents the txnPut command
+var txnPutCmd = &cobra.Command{
+	Use:   "txn-put",
+	Short: "Benchmark txn-put",
+
+	Run: txnPutFunc,
+}
+
+var (
+	txnPutTotal     int
+	txnPutRate      int
+	txnPutOpsPerTxn int
+)
+
+func init() {
+	RootCmd.AddCommand(txnPutCmd)
+	txnPutCmd.Flags().IntVar(&keySize, "key-size", 8, "Key size of txn put")
+	txnPutCmd.Flags().IntVar(&valSize, "val-size", 8, "Value size of txn put")
+	txnPutCmd.Flags().IntVar(&txnPutOpsPerTxn, "txn-ops", 1, "Number of puts per txn")
+	txnPutCmd.Flags().IntVar(&txnPutRate, "rate", 0, "Maximum txns per second (0 is no limit)")
+
+	txnPutCmd.Flags().IntVar(&txnPutTotal, "total", 10000, "Total number of txn requests")
+	txnPutCmd.Flags().IntVar(&keySpaceSize, "key-space-size", 1, "Maximum possible keys")
+}
+
+func txnPutFunc(cmd *cobra.Command, args []string) {
+	if keySpaceSize <= 0 {
+		fmt.Fprintf(os.Stderr, "expected positive --key-space-size, got (%v)", keySpaceSize)
+		os.Exit(1)
+	}
+
+	requests := make(chan []v3.Op, totalClients)
+	if txnPutRate == 0 {
+		txnPutRate = math.MaxInt32
+	}
+	limit := rate.NewLimiter(rate.Limit(txnPutRate), 1)
+	clients := mustCreateClients(totalClients, totalConns)
+	k, v := make([]byte, keySize), string(mustRandBytes(valSize))
+
+	bar = pb.New(txnPutTotal)
+	bar.Format("Bom !")
+	bar.Start()
+
+	r := newReport()
+	for i := range clients {
+		wg.Add(1)
+		go func(c *v3.Client) {
+			defer wg.Done()
+			for ops := range requests {
+				limit.Wait(context.Background())
+				st := time.Now()
+				_, err := c.Txn(context.TODO()).Then(ops...).Commit()
+				r.Results() <- report.Result{Err: err, Start: st, End: time.Now()}
+				bar.Increment()
+			}
+		}(clients[i])
+	}
+
+	go func() {
+		for i := 0; i < txnPutTotal; i++ {
+			ops := make([]v3.Op, txnPutOpsPerTxn)
+			for j := 0; j < txnPutOpsPerTxn; j++ {
+				binary.PutVarint(k, int64(((i*txnPutOpsPerTxn)+j)%keySpaceSize))
+				ops[j] = v3.OpPut(string(k), v)
+			}
+			requests <- ops
+		}
+		close(requests)
+	}()
+
+	rc := r.Run()
+	wg.Wait()
+	close(r.Results())
+	bar.Finish()
+	fmt.Println(<-rc)
+}