/
gohammer.go
225 lines (194 loc) · 4.56 KB
/
gohammer.go
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package main
import (
"encoding/binary"
"flag"
"fmt"
"log"
"math/rand"
"os"
"runtime/pprof"
"strings"
"sync"
"sync/atomic"
"time"
"github.com/dustin/gomemcached"
"github.com/dustin/gomemcached/client"
)
// Modified atomically.
var isDone int32
func handleResponses(client *memcached.Client, ch chan<- Result) {
for {
res, err := client.Receive()
ch <- Result{
Error: err,
Res: res,
}
}
}
func sendCommand(client *memcached.Client,
opcode gomemcached.CommandCode,
vb uint16,
key []byte,
body []byte) {
flags := 19
exp := 0
var err error
switch opcode {
default:
log.Fatalf("Unhandled opcode: %v", opcode)
case gomemcached.GETQ, gomemcached.DELETEQ:
err = client.Transmit(&gomemcached.MCRequest{
Opcode: opcode,
VBucket: vb,
Key: key,
Cas: 0,
Opaque: 0,
Extras: []byte{},
Body: []byte{}})
case gomemcached.ADDQ, gomemcached.SETQ:
req := &gomemcached.MCRequest{
Opcode: opcode,
VBucket: vb,
Key: key,
Cas: 0,
Opaque: 0,
Extras: []byte{0, 0, 0, 0, 0, 0, 0, 0},
Body: body}
binary.BigEndian.PutUint64(req.Extras, uint64(flags)<<32|uint64(exp))
err = client.Transmit(req)
}
if err != nil {
log.Fatalf("Error transmitting request: %v", err)
}
}
func doStuff(id int,
res chan<- Result,
wg *sync.WaitGroup,
body []byte,
prot, addr string) {
defer wg.Done()
localstats := [256]int64{}
keys := make([][]byte, *nkeys / *concurrency)
vbuckets := make([]uint16, *nvbuckets)
for i := 0; i < len(keys); i++ {
keys[i] = []byte(fmt.Sprintf("c%d.k%d", id, i))
vbuckets = append(vbuckets, uint16(rand.Intn(*nvbuckets)))
}
client, err := memcached.Connect(prot, addr)
if err != nil {
log.Printf("Error connecting to %v/%v: %v", prot, addr, err)
return
}
go handleResponses(client, res)
applyLocalStats := func() {
for j, v := range localstats {
atomic.AddInt64(&stats[j], v)
localstats[j] = 0
}
}
cmdi := 0
ids := rand.Perm(len(keys))
for {
for i, thisId := range ids {
key := keys[thisId]
opcode := cmds.cmds[cmdi]
sendCommand(client, opcode, vbuckets[thisId], key, body)
localstats[opcode]++
if i%1000 == 0 {
applyLocalStats()
if atomic.LoadInt32(&isDone) == 1 {
return
}
}
}
applyLocalStats()
cmdi++
if cmdi >= len(cmds.cmds) {
cmdi = 0
ids = rand.Perm(len(keys))
}
}
}
var prot = flag.String("prot", "tcp", "Layer 3 protocol (tcp, tcp4, tcp6)")
var dest = flag.String("dest", "localhost:11211", "Host:port to connect to")
var concurrency = flag.Int("concurrency", 32, "Number of concurrent clients")
var nkeys = flag.Int("keys", 1000000, "Number of keys")
var bodylen = flag.Int("bodylen", 20, "Number of bytes of value")
var nvbuckets = flag.Int("nvbuckets", 1, "Number of vbuckets (sequential)")
var cpuprofile = flag.String("cpuprofile", "", "write cpu profile to file")
var testDuration = flag.Duration("duration", 0,
"Total duration of test (0 == forever)")
type opSeqType struct {
cmds []gomemcached.CommandCode
}
var cmds = opSeqType{cmds: []gomemcached.CommandCode{
gomemcached.ADDQ,
gomemcached.GETQ,
gomemcached.DELETEQ,
}}
var (
cmd_ops = map[string]gomemcached.CommandCode{}
cmd_names = map[gomemcached.CommandCode]string{}
)
func init() {
for v, k := range gomemcached.CommandNames {
k = strings.ToLower(k)
if strings.HasSuffix(k, "q") {
n := k[:len(k)-1]
cmd_ops[n] = v
cmd_names[v] = n
}
}
}
func (o opSeqType) String() string {
a := []string{}
for _, v := range o.cmds {
a = append(a, cmd_names[v])
}
return strings.Join(a, ",")
}
func (o *opSeqType) Set(to string) error {
parts := strings.Split(to, ",")
o.cmds = o.cmds[:0]
for _, p := range parts {
v, ok := cmd_ops[p]
if !ok {
return fmt.Errorf("Unknown command: %v", p)
}
o.cmds = append(o.cmds, v)
}
return nil
}
func main() {
flag.Var(&cmds, "ops", "The sequene of operations to perform")
flag.Parse()
if *cpuprofile != "" {
f, err := os.Create(*cpuprofile)
if err != nil {
log.Fatal(err)
}
pprof.StartCPUProfile(f)
defer pprof.StopCPUProfile()
}
log.Printf("Connecting %d clients to %s/%s", *concurrency, *prot, *dest)
results := NewController(*nkeys)
wg := sync.WaitGroup{}
// Initialize the value
body := make([]byte, *bodylen)
for i := 0; i < *bodylen; i++ {
body[i] = 'x'
}
// Start them all
wg.Add(*concurrency)
for i := 0; i < *concurrency; i++ {
go doStuff(i, results, &wg, body, *prot, *dest)
}
if *testDuration != 0 {
time.AfterFunc(*testDuration, func() {
log.Printf("Marking done.")
atomic.StoreInt32(&isDone, 1)
})
}
// Wait for them all to die
wg.Wait()
}