/usr/share/gocode/src/github.com/minio/dsync/performance/performance.go is in golang-github-minio-dsync-dev 0.0~git20170209.0.b9f7da7-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 | /*
* Minio Cloud Storage, (C) 2016 Minio, Inc.
*
* 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 main
import (
"flag"
"fmt"
"log"
"math/rand"
"net"
"net/http"
"net/rpc"
"os"
"os/signal"
"strconv"
"strings"
"sync"
"time"
"github.com/minio/dsync"
)
const rpcPath = "/dsync"
var servers = []string{
"10.x0.y0.z0:12345",
"10.x1.y1.z1:12346",
"10.x2.y2.z2:12347",
"10.x3.y3.z3:12348",
"10.x4.y4.z4:12349",
"10.x5.y5.z5:12350",
"10.x6.y6.z6:12351",
"10.x7.y7.z7:12352"}
var (
portFlag = flag.Int("p", 0, "Port for server to listen on")
resources []string
)
func lockLoop(w *sync.WaitGroup, timeStart *time.Time, runs int, done *bool, nr int, ch chan<- float64) {
defer w.Done()
dm := dsync.NewDRWMutex(fmt.Sprintf("chaos-%d-%d", *portFlag, nr))
delayMax := float64(0.0)
timeLast := time.Now()
var run int
for run = 1; !*done && run <= runs; run++ {
dm.Lock()
if run == 1 { // re-initialize timing info to account for initial delay to start all servers
*timeStart = time.Now()
timeLast = time.Now()
}
duration := time.Since(timeLast)
if delayMax < duration.Seconds() || run%100 == 0 {
if delayMax < duration.Seconds() {
delayMax = duration.Seconds()
}
fmt.Print(".")
}
timeLast = time.Now()
dm.Unlock()
}
ch <- delayMax
}
func startRPCServer(port int) {
server := rpc.NewServer()
server.RegisterName("Dsync", &lockServer{
mutex: sync.Mutex{},
lockMap: make(map[string]int64),
})
// For some reason the registration paths need to be different (even for different server objs)
server.HandleHTTP(resources[port-12345], fmt.Sprintf("%s-debug", resources[port-12345]))
l, e := net.Listen("tcp", ":"+strconv.Itoa(port))
if e != nil {
log.Fatal("listen error:", e)
}
go http.Serve(l, nil)
}
func main() {
rand.Seed(time.Now().UTC().UnixNano())
flag.Parse()
if *portFlag == 0 {
log.Fatalf("No port number specified")
}
resources = make([]string, 0, len(servers)) // list of rpc paths where lock server is serving.
for i := range servers {
resources = append(resources, rpcPath+"-"+strconv.Itoa(i))
}
// Initialize net/rpc clients for dsync.
var clnts []dsync.NetLocker
for i := 0; i < len(servers); i++ {
clnts = append(clnts, newClient(servers[i], resources[i]))
}
if err := dsync.Init(clnts, getSelfNode(clnts, *portFlag)); err != nil {
log.Fatalf("set nodes failed with %v", err)
}
// Start server
startRPCServer(*portFlag)
timeStart := time.Now()
done := false
// Catch Ctrl-C and abort gracefully with release of locks
c := make(chan os.Signal, 1)
signal.Notify(c, os.Interrupt)
go func() {
for sig := range c {
fmt.Println("Ctrl-C intercepted", sig)
done = true
}
}()
runs := 40000
parallel := 5
wait := sync.WaitGroup{}
wait.Add(parallel)
// Create channel to get back max delay
ch := make(chan float64, parallel)
fmt.Println("Test starting...")
for i := 0; i < parallel; i++ {
go lockLoop(&wait, &timeStart, runs, &done, i, ch)
}
totalRuns := runs * parallel
wait.Wait()
close(ch)
delayMax := float64(0.0)
for c := range ch {
if delayMax < c {
delayMax = c
}
}
fmt.Println("")
fmt.Printf(" Locks/sec: %7.0f\n", 1.0/(time.Since(timeStart).Seconds()/float64(totalRuns)))
fmt.Printf(" Msgs/sec: %7.0f\n", float64(len(servers))*2.0*1.0/(time.Since(timeStart).Seconds()/float64(totalRuns)))
fmt.Printf(" Worst case delay: %5.3f s\n", delayMax)
if !done {
// Let release messages get out
fmt.Println("Waiting for test to close...")
time.Sleep(10000 * time.Millisecond)
}
}
func getSelfNode(rpcClnts []dsync.NetLocker, port int) int {
index := -1
for i, c := range rpcClnts {
p, _ := strconv.Atoi(strings.Split(c.ServerAddr(), ":")[1])
if port == p {
if index == -1 {
index = i
} else {
panic("More than one port found")
}
}
}
return index
}
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