[FAB-5273] Perf oriented broadcast_msg

The existing broadcast_timestamp only operates on one go routine.  This
CR allows the number of go routines to be specified on the CLI.

It also signs messages as the signature verification is the piece which
CPU bounds the orderer.

Additionally, the message size may now be specified as a parameter.

Change-Id: I2edf0c891161b66044d4713e3e928c1067fd6470
Signed-off-by: Jason Yellick <jyellick@us.ibm.com>

orderer/sample_clients/broadcast_msg/client.go

@@ -0,0 +1,137 @@
+/*
+Copyright IBM Corp. All Rights Reserved.
+
+SPDX-License-Identifier: Apache-2.0
+*/
+
+package main
+
+import (
+	"flag"
+	"fmt"
+	"os"
+	"sync"
+	"time"
+
+	"github.com/hyperledger/fabric/common/crypto"
+	"github.com/hyperledger/fabric/common/localmsp"
+	"github.com/hyperledger/fabric/common/tools/configtxgen/provisional"
+	mspmgmt "github.com/hyperledger/fabric/msp/mgmt"
+	"github.com/hyperledger/fabric/orderer/common/localconfig"
+	cb "github.com/hyperledger/fabric/protos/common"
+	ab "github.com/hyperledger/fabric/protos/orderer"
+	"github.com/hyperledger/fabric/protos/utils"
+
+	"golang.org/x/net/context"
+	"google.golang.org/grpc"
+)
+
+type broadcastClient struct {
+	client  ab.AtomicBroadcast_BroadcastClient
+	signer  crypto.LocalSigner
+	chainID string
+}
+
+// newBroadcastClient creates a simple instance of the broadcastClient interface
+func newBroadcastClient(client ab.AtomicBroadcast_BroadcastClient, chainID string, signer crypto.LocalSigner) *broadcastClient {
+	return &broadcastClient{client: client, chainID: chainID, signer: signer}
+}
+
+func (s *broadcastClient) broadcast(transaction []byte) error {
+	env, err := utils.CreateSignedEnvelope(cb.HeaderType_MESSAGE, s.chainID, s.signer, &cb.Envelope{Signature: transaction}, 0, 0)
+	if err != nil {
+		panic(err)
+	}
+	time.Sleep(time.Second)
+	return s.client.Send(env)
+}
+
+func (s *broadcastClient) getAck() error {
+	msg, err := s.client.Recv()
+	if err != nil {
+		return err
+	}
+	if msg.Status != cb.Status_SUCCESS {
+		return fmt.Errorf("Got unexpected status: %v - %s", msg.Status, msg.Info)
+	}
+	return nil
+}
+
+func main() {
+	config := config.Load()
+
+	// Load local MSP
+	err := mspmgmt.LoadLocalMsp(config.General.LocalMSPDir, config.General.BCCSP, config.General.LocalMSPID)
+	if err != nil { // Handle errors reading the config file
+		fmt.Println("Failed to initialize local MSP:", err)
+		os.Exit(0)
+	}
+
+	signer := localmsp.NewSigner()
+
+	var chainID string
+	var serverAddr string
+	var messages uint64
+	var goroutines uint64
+	var msgSize uint64
+
+	flag.StringVar(&serverAddr, "server", fmt.Sprintf("%s:%d", config.General.ListenAddress, config.General.ListenPort), "The RPC server to connect to.")
+	flag.StringVar(&chainID, "chainID", provisional.TestChainID, "The chain ID to broadcast to.")
+	flag.Uint64Var(&messages, "messages", 1, "The number of messages to broadcast.")
+	flag.Uint64Var(&goroutines, "goroutines", 1, "The number of concurrent go routines to broadcast the messages on")
+	flag.Uint64Var(&msgSize, "size", 1024, "The size in bytes of the data section for the payload")
+	flag.Parse()
+
+	conn, err := grpc.Dial(serverAddr, grpc.WithInsecure())
+	defer func() {
+		_ = conn.Close()
+	}()
+	if err != nil {
+		fmt.Println("Error connecting:", err)
+		return
+	}
+
+	msgsPerGo := messages / goroutines
+	roundMsgs := msgsPerGo * goroutines
+	if roundMsgs != messages {
+		fmt.Println("Rounding messages to", roundMsgs)
+	}
+
+	msgData := make([]byte, msgSize)
+
+	var wg sync.WaitGroup
+	wg.Add(int(goroutines))
+	for i := uint64(0); i < goroutines; i++ {
+		go func(i uint64) {
+			client, err := ab.NewAtomicBroadcastClient(conn).Broadcast(context.TODO())
+			time.Sleep(10 * time.Second)
+			if err != nil {
+				fmt.Println("Error connecting:", err)
+				return
+			}
+
+			s := newBroadcastClient(client, chainID, signer)
+			done := make(chan (struct{}))
+			go func() {
+				for i := uint64(0); i < msgsPerGo; i++ {
+					err = s.getAck()
+				}
+				if err != nil {
+					fmt.Printf("\nError: %v\n", err)
+				}
+				close(done)
+			}()
+			for i := uint64(0); i < msgsPerGo; i++ {
+				if err := s.broadcast(msgData); err != nil {
+					panic(err)
+				}
+			}
+			<-done
+			wg.Done()
+			client.CloseSend()
+			fmt.Println("Go routine", i, "exiting")
+		}(i)
+	}
+
+	wg.Wait()
+}