[tm-bench] show basic stats

```
===
Avg block time: 1225.504 ms
Avg tx throughput: 905 per sec
Avg block latency: 6.121 ms
===
```

tm-bench/glide.lock

@@ -1,5 +1,5 @@
-hash: db5c45d85f63559c544e26ff73ef936faa98b80a9a48fa23a8170b42ea11f916
-updated: 2017-03-13T14:46:21.687902055Z
+hash: 7b3982490e9c4cdc9467e849959fd8d6ccec8f8f9e81fc56f29e8e9c67bf3b53
+updated: 2017-03-16T15:16:05.301074208Z
 imports:
 - name: github.com/btcsuite/btcd
   version: 583684b21bfbde9b5fc4403916fd7c807feb0289
@@ -7,6 +7,13 @@ imports:
   - btcec
 - name: github.com/BurntSushi/toml
   version: e643e9ef00b049d75de26e61109c5ea01885cd21
+- name: github.com/go-kit/kit
+  version: b6f30a2e0632f5722fb26d8765d726335b79d3e6
+  subpackages:
+  - log
+  - log/term
+- name: github.com/go-logfmt/logfmt
+  version: 390ab7935ee28ec6b286364bba9b4dd6410cb3d5
 - name: github.com/go-stack/stack
   version: 100eb0c0a9c5b306ca2fb4f165df21d80ada4b82
 - name: github.com/golang/protobuf
@@ -16,15 +23,17 @@ imports:
 - name: github.com/golang/snappy
   version: 553a641470496b2327abcac10b36396bd98e45c9
 - name: github.com/gorilla/websocket
-  version: 3ab3a8b8831546bd18fd182c20687ca853b2bb13
+  version: b258b4fadb573ac412f187b9f31974ea99d32f50
 - name: github.com/jmhodges/levigo
   version: c42d9e0ca023e2198120196f842701bb4c55d7b9
+- name: github.com/kr/logfmt
+  version: b84e30acd515aadc4b783ad4ff83aff3299bdfe0
 - name: github.com/mattn/go-colorable
   version: a392f450ea64cee2b268dfaacdc2502b50a22b18
 - name: github.com/mattn/go-isatty
   version: 57fdcb988a5c543893cc61bce354a6e24ab70022
 - name: github.com/pkg/errors
-  version: 645ef00459ed84a119197bfb8d8205042c6df63d
+  version: bfd5150e4e41705ded2129ec33379de1cb90b513
 - name: github.com/rcrowley/go-metrics
   version: 1f30fe9094a513ce4c700b9a54458bbb0c96996c
 - name: github.com/syndtr/goleveldb
@@ -43,7 +52,7 @@ imports:
   - leveldb/table
   - leveldb/util
 - name: github.com/tendermint/abci
-  version: 1236e8fb6eee3a63909f4014a8e84385ead7933d
+  version: af792eac777de757cd496349a5f6b5313738fcbc
   subpackages:
   - types
 - name: github.com/tendermint/ed25519
@@ -76,7 +85,7 @@ imports:
   subpackages:
   - upnp
 - name: github.com/tendermint/go-rpc
-  version: b54b9b4ecc2c444f7b11077f24e5abafdcc98676
+  version: fcea0cda21f64889be00a0f4b6d13266b1a76ee7
   subpackages:
   - client
   - server
@@ -93,10 +102,11 @@ imports:
   - rpc/core/types
   - types
 - name: github.com/tendermint/tools
-  version: ce69eaa75eb08b21d22b6ecd3cf5a20d38ec57e2
+  version: fb28fd4c13759026de23d98bb494a022840278c1
   subpackages:
   - tm-monitor
   - tm-monitor/eventmeter
+  - tm-monitor/monitor
 - name: golang.org/x/crypto
   version: 728b753d0135da6801d45a38e6f43ff55779c5c2
   subpackages:
@@ -123,7 +133,7 @@ imports:
   subpackages:
   - unix
 - name: google.golang.org/grpc
-  version: d50cf2db166eaff3f2429425758d12205085eb5b
+  version: cdee119ee21e61eef7093a41ba148fa83585e143
   subpackages:
   - codes
   - credentials

tm-bench/glide.yaml

@@ -7,4 +7,4 @@ import:
   - types
 - package: github.com/tendermint/tools
   subpackages:
-  - tm-monitor
+  - tm-monitor/monitor

tm-bench/main.go

@@ -1,4 +1,4 @@
-package bench
+package main
 
 import (
 	"flag"
@@ -7,14 +7,14 @@ import (
 	"strings"
 	"time"
 
-	monitor "github.com/tendermint/tools/tm-monitor"
+	"github.com/tendermint/tools/tm-monitor/monitor"
 )
 
 var version = "0.1.0.pre"
 
 func main() {
 	var listenAddr string
-	var connections, duration, txsRate int
+	var duration, txsRate int
 
 	flag.StringVar(&listenAddr, "listen-addr", "tcp://0.0.0.0:46670", "HTTP and Websocket server listen address")
 	flag.IntVar(&duration, "T", 10, "Exit after the specified amount of time in seconds")
@@ -43,32 +43,24 @@ Examples:
 
 	m := startMonitor(flag.Arg(0))
 
-	transacters := make([]*Transacter, len(endpoints))
-	for _, e := range strings.Split(endpoints, ",") {
-		t := &transacter{e, txsRate}
+	endpoints := strings.Split(flag.Arg(0), ",")
+	transacters := make([]*transacter, len(endpoints))
+	for i, e := range endpoints {
+		t := newTransacter(e, txsRate)
 		if err := t.Start(); err != nil {
-			fmt.Println(err.Error())
-			os.Exit(1)
+			panic(err)
 		}
-		append(transacters, t)
+		transacters[i] = t
 	}
 
 	select {
-	case time.After(duration * time.Second):
+	case <-time.After(time.Duration(duration) * time.Second):
 		for _, t := range transacters {
 			t.Stop()
 		}
 		collectAndPrintResults(m)
 		m.Stop()
 	}
-
-	cmn.TrapSignal(func() {
-		for _, t := range transacters {
-			t.Stop()
-		}
-		collectAndPrintResults(m)
-		m.Stop()
-	})
 }
 
 func startMonitor(endpoints string) *monitor.Monitor {
@@ -76,19 +68,22 @@ func startMonitor(endpoints string) *monitor.Monitor {
 
 	for _, e := range strings.Split(endpoints, ",") {
 		if err := m.Monitor(monitor.NewNode(e)); err != nil {
-			fmt.Println(err.Error())
-			os.Exit(1)
+			panic(err)
 		}
 	}
 
 	if err := m.Start(); err != nil {
-		fmt.Println(err.Error())
-		os.Exit(1)
+		panic(err)
 	}
 
 	return m
 }
 
-func collectAndPrintResults(m *Monitor) {
-	fmt.Printf("%d", m.Network.Height)
+func collectAndPrintResults(m *monitor.Monitor) {
+	n := m.Network
+	fmt.Println("===")
+	fmt.Printf("Avg block time: %.3f ms\n", n.AvgBlockTime)
+	fmt.Printf("Avg tx throughput: %.0f per sec\n", n.AvgTxThroughput)
+	fmt.Printf("Avg block latency: %.3f ms\n", n.AvgBlockLatency)
+	fmt.Println("===")
 }

tm-bench/transacter.go

@@ -1,4 +1,4 @@
-package bench
+package main
 
 import (
 	"crypto/rand"
@@ -23,19 +23,27 @@ type transacter struct {
 	wg      sync.WaitGroup
 }
 
+func newTransacter(target string, rate int) *transacter {
+	return &transacter{
+		Target: target,
+		Rate:   rate,
+		wsc:    rpcclient.NewWSClient(target, "/websocket"),
+	}
+}
+
 func (t *transacter) Start() error {
-	t.wsc = rpcclient.NewWSClient(t.Target, "/websocket")
+	t.stopped = false
 	if _, err := t.wsc.Start(); err != nil {
 		return err
 	}
-	wg.Add(1)
+	t.wg.Add(1)
 	go t.sendLoop()
 	return nil
 }
 
 func (t *transacter) Stop() {
 	t.stopped = true
-	wg.Wait()
+	t.wg.Wait()
 	t.wsc.Stop()
 }
 
@@ -59,18 +67,18 @@ func (t *transacter) sendLoop() {
 		}
 
 		if t.stopped {
-			wg.Done()
+			t.wg.Done()
 			return
 		}
 
-		timeToSend := time.Now() - startTime
-		timer.Sleep(time.Second - timeToSend)
+		timeToSend := time.Now().Sub(startTime)
+		time.Sleep(time.Second - timeToSend)
 	}
 }
 
 // generateTx returns a random byte sequence where first 8 bytes are the number
 // of transaction.
-func generateTx(num) []byte {
+func generateTx(num int) []byte {
 	tx := make([]byte, 250)
 	binary.PutUvarint(tx[:32], uint64(num))
 	if _, err := rand.Read(tx[234:]); err != nil {