feat(benchmarks): add p2p stress test (#91)

benchmarks/benchmark_test.go

@@ -3,9 +3,9 @@ package graphsync_test
 import (
 	"bytes"
 	"context"
-	"crypto/rand"
 	"fmt"
 	"io/ioutil"
+	"math/rand"
 	"os"
 	"runtime"
 	"strings"
@@ -31,6 +31,7 @@ import (
 	basicnode "github.com/ipld/go-ipld-prime/node/basic"
 	ipldselector "github.com/ipld/go-ipld-prime/traversal/selector"
 	"github.com/ipld/go-ipld-prime/traversal/selector/builder"
+	mocknet "github.com/libp2p/go-libp2p/p2p/net/mock"
 	"github.com/stretchr/testify/require"
 )
 
@@ -48,10 +49,82 @@ func BenchmarkRoundtripSuccess(b *testing.B) {
 	tdm, err := newTempDirMaker(b)
 	require.NoError(b, err)
 	b.Run("test-20-10000", func(b *testing.B) {
-		subtestDistributeAndFetch(ctx, b, 20, delay.Fixed(0), time.Duration(0), allFilesUniformSize(10000), tdm)
+		subtestDistributeAndFetch(ctx, b, 20, delay.Fixed(0), time.Duration(0), allFilesUniformSize(10000, defaultUnixfsChunkSize, defaultUnixfsLinksPerLevel), tdm)
+	})
+	b.Run("test-p2p-stress-10-128MB", func(b *testing.B) {
+		p2pStrestTest(ctx, b, 20, allFilesUniformSize(128*(1<<20), 1<<20, 1024), tdm)
 	})
 }
 
+func p2pStrestTest(ctx context.Context, b *testing.B, numfiles int, df distFunc, tdm *tempDirMaker) {
+	ctx, cancel := context.WithCancel(ctx)
+	defer cancel()
+	mn := mocknet.New(ctx)
+	mn.SetLinkDefaults(mocknet.LinkOptions{Latency: 100 * time.Millisecond, Bandwidth: 3000000})
+	net := tn.StreamNet(ctx, mn)
+	ig := testinstance.NewTestInstanceGenerator(ctx, net, nil, tdm)
+	instances, err := ig.Instances(1 + b.N)
+	require.NoError(b, err)
+	var allCids []cid.Cid
+	for i := 0; i < numfiles; i++ {
+		thisCids := df(ctx, b, instances[:1])
+		allCids = append(allCids, thisCids...)
+	}
+	ssb := builder.NewSelectorSpecBuilder(basicnode.Style.Any)
+
+	allSelector := ssb.ExploreRecursive(ipldselector.RecursionLimitNone(),
+		ssb.ExploreAll(ssb.ExploreRecursiveEdge())).Node()
+
+	runtime.GC()
+	b.ResetTimer()
+	b.ReportAllocs()
+	for i := 0; i < b.N; i++ {
+		fetcher := instances[i+1]
+		var wg sync.WaitGroup
+		ctx, cancel := context.WithTimeout(ctx, 10*time.Second)
+		require.NoError(b, err)
+		start := time.Now()
+		disconnectOn := rand.Intn(numfiles)
+		for j := 0; j < numfiles; j++ {
+			resultChan, errChan := fetcher.Exchange.Request(ctx, instances[0].Peer, cidlink.Link{Cid: allCids[j]}, allSelector)
+
+			wg.Add(1)
+			go func(j int) {
+				defer wg.Done()
+				results := 0
+				for {
+					select {
+					case <-ctx.Done():
+						return
+					case <-resultChan:
+						results++
+						if results == 100 && j == disconnectOn {
+							mn.DisconnectPeers(instances[0].Peer, instances[i+1].Peer)
+							mn.UnlinkPeers(instances[0].Peer, instances[i+1].Peer)
+							time.Sleep(100 * time.Millisecond)
+							mn.LinkPeers(instances[0].Peer, instances[i+1].Peer)
+						}
+					case err, ok := <-errChan:
+						if !ok {
+							return
+						}
+						b.Fatalf("received error on request: %s", err.Error())
+					}
+				}
+			}(j)
+		}
+		wg.Wait()
+		result := runStats{
+			Time: time.Since(start),
+			Name: b.Name(),
+		}
+		benchmarkLog = append(benchmarkLog, result)
+		cancel()
+		fetcher.Close()
+	}
+	testinstance.Close(instances)
+	ig.Close()
+}
 func subtestDistributeAndFetch(ctx context.Context, b *testing.B, numnodes int, d delay.D, bstoreLatency time.Duration, df distFunc, tdm *tempDirMaker) {
 	ctx, cancel := context.WithCancel(ctx)
 	defer cancel()
@@ -116,10 +189,10 @@ func subtestDistributeAndFetch(ctx context.Context, b *testing.B, numnodes int,
 
 type distFunc func(ctx context.Context, b *testing.B, provs []testinstance.Instance) []cid.Cid
 
-const unixfsChunkSize uint64 = 1 << 10
-const unixfsLinksPerLevel = 1024
+const defaultUnixfsChunkSize uint64 = 1 << 10
+const defaultUnixfsLinksPerLevel = 1024
 
-func loadRandomUnixFxFile(ctx context.Context, b *testing.B, bs blockstore.Blockstore, size uint64) cid.Cid {
+func loadRandomUnixFxFile(ctx context.Context, b *testing.B, bs blockstore.Blockstore, size uint64, unixfsChunkSize uint64, unixfsLinksPerLevel int) cid.Cid {
 
 	data := make([]byte, size)
 	_, err := rand.Read(data)
@@ -151,11 +224,11 @@ func loadRandomUnixFxFile(ctx context.Context, b *testing.B, bs blockstore.Block
 	return nd.Cid()
 }
 
-func allFilesUniformSize(size uint64) distFunc {
+func allFilesUniformSize(size uint64, unixfsChunkSize uint64, unixfsLinksPerLevel int) distFunc {
 	return func(ctx context.Context, b *testing.B, provs []testinstance.Instance) []cid.Cid {
 		cids := make([]cid.Cid, 0, len(provs))
 		for _, prov := range provs {
-			c := loadRandomUnixFxFile(ctx, b, prov.BlockStore, size)
+			c := loadRandomUnixFxFile(ctx, b, prov.BlockStore, size, unixfsChunkSize, unixfsLinksPerLevel)
 			cids = append(cids, c)
 		}
 		return cids

benchmarks/testnet/peernet.go

@@ -0,0 +1,40 @@
+package testnet
+
+import (
+	"context"
+
+	gsnet "github.com/ipfs/go-graphsync/network"
+
+	"github.com/libp2p/go-libp2p-core/peer"
+	tnet "github.com/libp2p/go-libp2p-testing/net"
+	mockpeernet "github.com/libp2p/go-libp2p/p2p/net/mock"
+)
+
+type peernet struct {
+	mockpeernet.Mocknet
+}
+
+// StreamNet is a testnet that uses libp2p's MockNet
+func StreamNet(ctx context.Context, net mockpeernet.Mocknet) Network {
+	return &peernet{net}
+}
+
+func (pn *peernet) Adapter(p tnet.Identity) gsnet.GraphSyncNetwork {
+	client, err := pn.Mocknet.AddPeer(p.PrivateKey(), p.Address())
+	if err != nil {
+		panic(err.Error())
+	}
+	pn.Mocknet.LinkAll()
+	return gsnet.NewFromLibp2pHost(client)
+}
+
+func (pn *peernet) HasPeer(p peer.ID) bool {
+	for _, member := range pn.Mocknet.Peers() {
+		if p == member {
+			return true
+		}
+	}
+	return false
+}
+
+var _ Network = (*peernet)(nil)