1 files changed, 56 insertions, 0 deletions
diff --git a/test/benchmarks/tools/iperf.go b/test/benchmarks/tools/iperf.go
new file mode 100644
index 000000000..df3d9349b
--- /dev/null
+++ b/test/benchmarks/tools/iperf.go
@@ -0,0 +1,56 @@
+// 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 tools
+
+import (
+	"fmt"
+	"net"
+	"regexp"
+	"strconv"
+	"strings"
+	"testing"
+)
+
+// Iperf is for the client side of `iperf`.
+type Iperf struct {
+	Time int
+}
+
+// MakeCmd returns a iperf client command.
+func (i *Iperf) MakeCmd(ip net.IP, port int) []string {
+	// iperf report in Kb realtime
+	return strings.Split(fmt.Sprintf("iperf -f K --realtime --time %d -c %s -p %d", i.Time, ip, port), " ")
+}
+
+// Report parses output from iperf client and reports metrics.
+func (i *Iperf) Report(b *testing.B, output string) {
+	b.Helper()
+	// Parse bandwidth and report it.
+	bW, err := i.bandwidth(output)
+	if err != nil {
+		b.Fatalf("failed to parse bandwitdth from %s: %v", output, err)
+	}
+	b.ReportMetric(bW*1024, "bandwidth_b/s") // Convert from Kb/s to b/s.
+}
+
+// bandwidth parses the Bandwidth number from an iperf report. A sample is below.
+func (i *Iperf) 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)
+}