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// Copyright 2018 The go-ethereum Authors
// This file is part of go-ethereum.
//
// go-ethereum is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// go-ethereum is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with go-ethereum. If not, see <http://www.gnu.org/licenses/>.
package main
import (
"bytes"
"fmt"
"math/rand"
"time"
"github.com/ethereum/go-ethereum/log"
"github.com/ethereum/go-ethereum/metrics"
"github.com/ethereum/go-ethereum/swarm/testutil"
"github.com/pborman/uuid"
cli "gopkg.in/urfave/cli.v1"
)
type uploadResult struct {
hash string
digest []byte
}
func slidingWindowCmd(ctx *cli.Context, tuid string) error {
errc := make(chan error)
go func() {
errc <- slidingWindow(ctx, tuid)
}()
err := <-errc
if err != nil {
metrics.GetOrRegisterCounter(fmt.Sprintf("%s.fail", commandName), nil).Inc(1)
}
return err
}
func slidingWindow(ctx *cli.Context, tuid string) error {
var hashes []uploadResult //swarm hashes of the uploads
nodes := len(hosts)
log.Info("sliding window test started", "tuid", tuid, "nodes", nodes, "filesize(kb)", filesize, "timeout", timeout)
uploadedBytes := 0
networkDepth := 0
errored := false
outer:
for {
seed = int(time.Now().UTC().UnixNano())
log.Info("uploading to "+httpEndpoint(hosts[0])+" and syncing", "seed", seed)
t1 := time.Now()
randomBytes := testutil.RandomBytes(seed, filesize*1000)
hash, err := upload(randomBytes, httpEndpoint(hosts[0]))
if err != nil {
log.Error(err.Error())
return err
}
metrics.GetOrRegisterResettingTimer("sliding-window.upload-time", nil).UpdateSince(t1)
metrics.GetOrRegisterGauge("sliding-window.upload-depth", nil).Update(int64(len(hashes)))
fhash, err := digest(bytes.NewReader(randomBytes))
if err != nil {
log.Error(err.Error())
return err
}
log.Info("uploaded successfully", "hash", hash, "digest", fmt.Sprintf("%x", fhash), "sleeping", syncDelay)
hashes = append(hashes, uploadResult{hash: hash, digest: fhash})
time.Sleep(time.Duration(syncDelay) * time.Second)
uploadedBytes += filesize * 1000
q := make(chan struct{}, 1)
d := make(chan struct{})
defer close(q)
defer close(d)
for i, v := range hashes {
timeoutC := time.After(time.Duration(timeout) * time.Second)
errored = false
task:
for {
select {
case q <- struct{}{}:
go func() {
var start time.Time
done := false
for !done {
log.Info("trying to retrieve hash", "hash", v.hash)
idx := 1 + rand.Intn(len(hosts)-1)
ruid := uuid.New()[:8]
start = time.Now()
// fetch hangs when swarm dies out, so we have to jump through a bit more hoops to actually
// catch the timeout, but also allow this retry logic
err := fetch(v.hash, httpEndpoint(hosts[idx]), v.digest, ruid, "")
if err != nil {
log.Error("error fetching hash", "err", err)
continue
}
done = true
}
metrics.GetOrRegisterResettingTimer("sliding-window.single.fetch-time", nil).UpdateSince(start)
d <- struct{}{}
}()
case <-d:
<-q
break task
case <-timeoutC:
errored = true
log.Error("error retrieving hash. timeout", "hash idx", i)
metrics.GetOrRegisterCounter("sliding-window.single.error", nil).Inc(1)
break outer
default:
}
}
networkDepth = i
metrics.GetOrRegisterGauge("sliding-window.network-depth", nil).Update(int64(networkDepth))
log.Info("sliding window test successfully fetched file", "currentDepth", networkDepth)
// this test might take a long time to finish - but we'd like to see metrics while they accumulate and not just when
// the test finishes. therefore emit the metrics on each iteration
emitMetrics(ctx)
}
}
log.Info("sliding window test finished", "errored?", errored, "networkDepth", networkDepth, "networkDepth(kb)", networkDepth*filesize)
log.Info("stats", "uploadedFiles", len(hashes), "uploadedKb", uploadedBytes/1000, "filesizeKb", filesize)
return nil
}
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