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pitcher.go
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pitcher.go
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package main
import (
"fmt"
"net"
"errors"
"os"
"os/signal"
"time"
"syscall"
"runtime"
"flag"
"golang.org/x/net/ipv4"
"encoding/binary"
)
type stats struct {
Packets uint64
Bytes uint64
RTT uint64
}
type addrList []string
type options struct {
saddrs addrList
caddrs addrList
srvSrtPort int
cliSrtPort int
isServer bool
threads int
}
var shouldRun bool
func (i *addrList) String() string {
return fmt.Sprintf("%v", []string(*i))
}
func (al *addrList) Set(value string) error {
*al = append(*al, value)
return nil
}
func fmthuman(val float64) string {
idx := 0
sufix := []string{" ", "K", "M", "G", "T", "P"}
for ;val > 1024; {
val /= 1024
idx += 1
}
return fmt.Sprintf("%d %s", int(val), sufix[idx])
}
func receiver(src_ip string, src_port int, l_stats *stats) {
var i uint64
var b uint64
var batchSize uint64
batchSize = 1024
msgs := make([]ipv4.Message, batchSize)
for k := range msgs {
msgs[k].Buffers = [][]byte{make([]byte, 8)}
}
addr := net.UDPAddr{
Port: src_port,
IP: net.ParseIP(src_ip),
}
conn, err := net.ListenUDP("udp", &addr)
if err != nil {
panic(fmt.Sprintf("Could not bind to %v: %v", src_port, err))
}
pconn := ipv4.NewPacketConn(conn)
conn.SetDeadline(time.Now())
for ;shouldRun; {
cnt, err := pconn.ReadBatch(msgs, syscall.MSG_WAITFORONE)
if errors.Is(err, os.ErrDeadlineExceeded) {
conn.SetDeadline(time.Now().Add(time.Second * 5))
continue
} else if err != nil {
break
}
if cnt == 0 {
continue
}
i += uint64(cnt)
b += uint64(cnt * 8)
l_stats.Packets = i
l_stats.Bytes = b
conn.SetDeadline(time.Now().Add(time.Second * 5))
_, err = pconn.WriteBatch(msgs[0:cnt], 0)
if err != nil {
break
}
}
conn.Close()
}
func sender(src_ip string, src_port int, dst_ip string, dst_port int, l_stats *stats) {
var i uint64
var b uint64
var r uint64
var seen_time int64
data := make([]byte, 8)
daddr := net.UDPAddr{
IP: net.ParseIP(dst_ip),
Port: dst_port,
}
saddr := net.UDPAddr{
IP: net.ParseIP(src_ip),
Port: src_port,
}
conn, err := net.DialUDP("udp", &saddr, &daddr)
if err != nil {
panic(fmt.Sprintf("Could not bind to %v: %v", dst_port, err))
}
defer conn.Close()
conn.SetDeadline(time.Now())
for ;shouldRun; {
n, _, err := conn.ReadFromUDP(data)
if errors.Is(err, os.ErrDeadlineExceeded) {
goto SEND
} else if err != nil {
break
} else if n != 8 {
continue
}
i += 1
b += 8
seen_time, _ = binary.Varint(data)
r += uint64(time.Now().UnixMicro() - seen_time)
l_stats.Bytes = b
l_stats.Packets = i
l_stats.RTT = r
SEND:
conn.SetDeadline(time.Now().Add(time.Second * 5))
binary.PutVarint(data, time.Now().UnixMicro())
_, err = conn.Write(data)
}
}
func launcher(opts *options) {
var Pps uint64
var Bps uint64
var Rtt uint64
var lastPps uint64
var lastBps uint64
var lastRtt uint64
var calcPps float64
var calcBps float64
var calcRtt float64
var totalPps uint64
var totalBps uint64
var totalRtt uint64
var runners int
if opts.threads == 0 {
switch cntCPU := runtime.NumCPU(); {
case cntCPU < 3:
runners = 1
case cntCPU < 12:
runners = cntCPU >> 1
default:
runners = cntCPU >> 2
}
} else {
runners = opts.threads
}
g_stats := make([]stats, runners)
for i:=0;i<runners;i++ {
if opts.isServer {
go receiver(opts.saddrs[i % len(opts.saddrs)],
opts.srvSrtPort + i,
&g_stats[i])
} else {
go sender(opts.caddrs[i % len(opts.caddrs)],
opts.cliSrtPort + i,
opts.saddrs[i % len(opts.saddrs)],
opts.srvSrtPort + i,
&g_stats[i])
}
}
for ;shouldRun; {
Pps = 0
Bps = 0
Rtt = 0
for h:=0;h<runners;h++ {
Pps += g_stats[h].Packets
Bps += g_stats[h].Bytes
Rtt += g_stats[h].RTT
}
totalPps += Pps
totalBps += Bps
calcPps = float64(Pps - lastPps) * 1000 / 800
calcBps = float64(Bps - lastBps) * 1000 / 800
if opts.isServer {
fmt.Printf("\r%spps %sbps ", fmthuman(calcPps), fmthuman(calcBps*8))
} else {
totalRtt += Rtt
calcRtt = float64(Rtt - lastRtt) / float64(Pps - lastPps)
lastRtt = Rtt
fmt.Printf("\r%spps %sbps %0.02f us RTT ", fmthuman(calcPps), fmthuman(calcBps*8), calcRtt)
}
lastPps = Pps
lastBps = Bps
time.Sleep(time.Millisecond * 800)
}
fmt.Printf("\n")
}
func Init() {
c := make(chan os.Signal)
signal.Notify(c, os.Interrupt, syscall.SIGTERM)
go func() {
<-c
shouldRun = false
} ()
}
func main() {
shouldRun = true
var opts options
flag.Var(&opts.saddrs, "saddr", "The server IP.")
flag.Var(&opts.caddrs, "caddr", "The client IP.")
flag.BoolVar(&opts.isServer, "s", false, "Act as a server")
flag.IntVar(&opts.srvSrtPort, "p", 1330, "Initial server port")
flag.IntVar(&opts.cliSrtPort, "d", 1330, "Initial client port")
flag.IntVar(&opts.threads, "threads", 0, "number of threds")
flag.Parse()
Init()
if len(opts.saddrs) == 0 {
opts.saddrs = append(opts.saddrs, "0.0.0.0")
}
if len(opts.caddrs) == 0 {
opts.caddrs = append(opts.caddrs, "127.0.0.1")
}
launcher(&opts)
}