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// Copyright 2020 The gVisor Authors.
//
// 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 network
import (
"context"
"fmt"
"regexp"
"strconv"
"strings"
"testing"
"gvisor.dev/gvisor/pkg/test/dockerutil"
"gvisor.dev/gvisor/test/benchmarks/harness"
)
func BenchmarkIperf(b *testing.B) {
// Get two machines
clientMachine, err := h.GetMachine()
if err != nil {
b.Fatalf("failed to get machine: %v", err)
}
defer clientMachine.CleanUp()
serverMachine, err := h.GetMachine()
if err != nil {
b.Fatalf("failed to get machine: %v", err)
}
defer serverMachine.CleanUp()
for _, bm := range []struct {
name string
clientRuntime string
serverRuntime string
}{
// We are either measuring the server or the client. The other should be
// runc. e.g. Upload sees how fast the runtime under test uploads to a native
// server.
{name: "Upload", clientRuntime: dockerutil.Runtime(), serverRuntime: "runc"},
{name: "Download", clientRuntime: "runc", serverRuntime: dockerutil.Runtime()},
} {
b.Run(bm.name, func(b *testing.B) {
// Get a container from the server and set its runtime.
ctx := context.Background()
server := serverMachine.GetContainer(ctx, b)
defer server.CleanUp(ctx)
server.Runtime = bm.serverRuntime
// Get a container from the client and set its runtime.
client := clientMachine.GetContainer(ctx, b)
defer client.CleanUp(ctx)
client.Runtime = bm.clientRuntime
// iperf serves on port 5001 by default.
port := 5001
// Start the server.
if err := server.Spawn(ctx, dockerutil.RunOpts{
Image: "benchmarks/iperf",
Ports: []int{port},
}, "iperf", "-s"); err != nil {
b.Fatalf("failed to start server with: %v", err)
}
ip, err := serverMachine.IPAddress()
if err != nil {
b.Fatalf("failed to find server ip: %v", err)
}
servingPort, err := server.FindPort(ctx, port)
if err != nil {
b.Fatalf("failed to find port %d: %v", port, err)
}
// Make sure the server is up and serving before we run.
if err := harness.WaitUntilServing(ctx, clientMachine, ip, servingPort); err != nil {
b.Fatalf("failed to wait for server: %v", err)
}
// iperf report in Kb realtime
cmd := fmt.Sprintf("iperf -f K --realtime -c %s -p %d", ip.String(), servingPort)
// Run the client.
b.ResetTimer()
for i := 0; i < b.N; i++ {
out, err := client.Run(ctx, dockerutil.RunOpts{
Image: "benchmarks/iperf",
}, strings.Split(cmd, " ")...)
if err != nil {
b.Fatalf("failed to run client: %v", err)
}
b.StopTimer()
// Parse bandwidth and report it.
bW, err := bandwidth(out)
if err != nil {
b.Fatalf("failed to parse bandwitdth from %s: %v", out, err)
}
b.ReportMetric(bW*1024, "bandwidth") // Convert from Kb/s to b/s.
b.StartTimer()
}
})
}
}
// bandwidth parses the Bandwidth number from an iperf report. A sample is below.
func bandwidth(data string) (float64, error) {
re := regexp.MustCompile(`\[\s*\d+\][^\n]+\s+(\d+\.?\d*)\s+KBytes/sec`)
match := re.FindStringSubmatch(data)
if len(match) < 1 {
return 0, fmt.Errorf("failed get bandwidth: %s", data)
}
return strconv.ParseFloat(match[1], 64)
}
func TestParser(t *testing.T) {
sampleData := `
------------------------------------------------------------
Client connecting to 10.138.15.215, TCP port 32779
TCP window size: 45.0 KByte (default)
------------------------------------------------------------
[ 3] local 10.138.15.216 port 32866 connected with 10.138.15.215 port 32779
[ ID] Interval Transfer Bandwidth
[ 3] 0.0-10.0 sec 459520 KBytes 45900 KBytes/sec
`
bandwidth, err := bandwidth(sampleData)
if err != nil || bandwidth != 45900 {
t.Fatalf("failed with: %v and %f", err, bandwidth)
}
}
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