src/tests/end_to_end/perf/test/netstack_iperf_test.dart - fuchsia - Git at Google

 // Copyright 2020 The Fuchsia Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.

 import 'dart:convert';
 import 'dart:io';

 import 'package:meta/meta.dart';
 import 'package:sl4f/sl4f.dart';
 import 'package:test/test.dart';

 import 'helpers.dart';

 enum Protocol { udp, tcp }
 enum Direction { send, recv }

 // This test adds e2e performance benchmarks using iperf3 for TCP and UDP
 // traffic. This runs iperf3 in 2 ways:
 // - client and server both running in Fuchsia over loopback.
 // - server running in Fuchsia and client on the host.
 //
 // Some of the benchmarks are:
 // throughput - send/recv rate of transfer in bits/second
 // loss       - number of UDP packets that were sent but failed to reach the
 //              receiving application.
 // jitter     - mean deviation of latency experienced by receiver in msec for UDP.
 // TODO(iyerm): CPU usage  - Avg CPU usage during the iperf3 sessions.
 void main() {
   enableLoggingOutput();
   const componentUrl = 'fuchsia-pkg://fuchsia.com/iperf3#meta/iperf3.cmx';
   // TCP/UDP port number that the Fuchsia side will listen on.
   const port = 9001;

   // Process the json output from iperf3 and convert that to Catapult format.
   // 'send' indicates if the iperf output has device transmit stats.
   // 'recv' indicates if the iperf output has device receive stats.
   // 'deviceLocal' if the iperf sessions were local to the device over loopback.
   Future<void> processIperfResults(
       {@required bool send,
       @required bool recv,
       @required bool deviceLocal,
       @required PerfTestHelper helper,
       @required String resultsFile}) async {
     File localResultsFile;
     if (deviceLocal) {
       // Make a local copy of the json file generated by iperf3.
       localResultsFile =
           await helper.storage.dumpFile(resultsFile, 'iperf', 'json');
     } else {
       localResultsFile = File(resultsFile);
     }

     final List<Map<String, dynamic>> results = [];
     var iperfResults = jsonDecode(await localResultsFile.readAsString());
     // Retrieve records from iperf json.
     var setup = iperfResults['start']['test_start'];
     var protocol = setup['protocol'];
     var msgSize = setup['blksize'];
     var end = iperfResults['end'];
     var testSuite = 'fuchsia.netstack.iperf_benchmarks';

     Map<String, dynamic> sender;
     Map<String, dynamic> receiver;

     if (protocol == 'TCP') {
       sender = end['sum_sent'];
       receiver = end['sum_received'];
     } else {
       sender = end['sum'];
       // For UDP, there is no sum_received record, but we gather the
       // receiver information from server-output.
       var serverOutput = iperfResults['server_output_json'];
       receiver = serverOutput['end']['sum'];
       // server output summary contains only the sent-bytes, but
       // the interval data has the bytes transferred which we can
       // use to compute the received bit rate.
       if (!receiver['sender']) {
         var intervals = serverOutput['intervals'];
         int bytesTransferred = 0;
         for (var i in intervals) {
           bytesTransferred += i['sum']['bytes'];
         }
         receiver['bits_per_second'] =
             (bytesTransferred * 8) / receiver['seconds'];
       }
     }

     String testRun = '';
     if (deviceLocal) {
       testRun = 'lo/';
     }

     String unit(String key) {
       switch (key) {
         case 'bits_per_second':
           return 'count';
         case 'lost_packets':
           return 'count';
         case 'jitter_ms':
           return 'milliseconds';
         default:
           return 'unknown';
       }
     }

     // Translate iperf json to fuchsiaperf.json.
     if (send) {
       var key = 'bits_per_second';
       results.add({
         'label': '$testRun$protocol/send/${msgSize}bytes/$key',
         'test_suite': testSuite,
         'unit': unit(key),
         'values': [sender[key]],
         'split_first': false
       });
     }

     if (recv) {
       for (var key in receiver.keys) {
         if (key == 'bits_per_second' ||
             key == 'lost_packets' ||
             key == 'jitter_ms') {
           results.add({
             'label': '$testRun$protocol/recv/${msgSize}bytes/$key',
             'test_suite': testSuite,
             'unit': unit(key),
             'values': [receiver[key]],
             'split_first': false
           });
         }
       }
     }
     var fuchsiaperfFile = await Dump().writeAsString(
         'netstack_iperf_results', 'fuchsiaperf.json', jsonEncode(results));
     // Translate fuchsiaperf.json to Catapult format.
     await helper.performance.convertResults('runtime_deps/catapult_converter',
         fuchsiaperfFile, Platform.environment);
   }

   Future<void> startIperfServer(PerfTestHelper helper) async {
     // Start iperf server on the target device.
     await helper.sl4fDriver.ssh.start(
         '/bin/run $componentUrl --server --port $port --json',
         mode: ProcessStartMode.detached);

     // Poll for the server to have started listening for client
     // connection on the expected port.
     for (var i = 0; i < 5; i++) {
       await Future.delayed(Duration(seconds: 1));
       final inspect = Inspect(helper.sl4fDriver);
       final results =
           await inspect.snapshot(['netstack.cmx:Socket Info/*:LocalAddress']);
       if (results != null && results.isNotEmpty) {
         for (var j = 0; j < results.length; j++) {
           if (results[j]['payload'] != null &&
               results[j]['payload']['Socket Info'] != null) {
             for (final entry in results[j]['payload']['Socket Info'].entries) {
               if (entry.value['LocalAddress'] != null &&
                   entry.value['LocalAddress'] == ':$port') {
                 return;
               }
             }
           }
         }
       }
     }
     throw Sl4fException('Failed to start Iperf server.');
   }

   Future<void> runIperfClientTests(PerfTestHelper helper, Protocol proto,
       {bool send = true, bool recv = true, bool deviceLocal = true}) async {
     String protocolOption = '';
     String bwValue = '';
     String dirOption = '';
     String serverIp;

     if (proto == Protocol.udp) {
       protocolOption = '--udp';
     }

     if (deviceLocal) {
       // For localhost test, use maximum possible bandwidth.
       bwValue = '0';
     } else {
       // TODO(fxb/47782): Until we define separate link for ssh and data,
       // enforce a < 1Gbps rate on NUC7. After the bug is resolved, this can
       // be changed to '0' which means as much as the system and link can
       // transmit.
       bwValue = '100M';
     }

     if (send && !recv) {
       // This reverses the default direction of traffic flow such that
       // the target device sends traffic.
       dirOption = '--reverse';
     }

     if (deviceLocal) {
       serverIp = '127.0.0.1';
     } else {
       // TODO(fxb/47782): Currently, we are using the link used for ssh to also
       // inject data traffic. This is prone to interference to ssh and to the tests.
       // On NUC7, we can use a separate usb-ethernet interface for the test traffic.
       serverIp = helper.sl4fDriver.ssh.target;
     }

     var msgSizes = {64, 1024, 1400};
     for (var size in msgSizes) {
       try {
         var cmdArgs = [
           '--client',
           serverIp,
           '--port',
           '$port',
           '--length',
           '$size',
           '--json',
           protocolOption,
           '--bitrate',
           '$bwValue',
           dirOption,
           '--get-server-output'
         ];
         await startIperfServer(helper);
         String resultsFile;
         if (deviceLocal) {
           resultsFile = '/tmp/iperf_results.json';
           var args = cmdArgs.join(' ');
           final result = await helper.sl4fDriver.ssh
               .run('/bin/run $componentUrl $args > $resultsFile');
           expect(result.exitCode, equals(0));
         } else {
           // Run iperf3 client from the host-tools.
           final hostPath =
               Platform.script.resolve('runtime_deps/iperf3').toFilePath();
           final result = await Process.run(hostPath, cmdArgs, runInShell: true);
           var iperfFile =
               await Dump().writeAsString('iperf', 'json', result.stdout);
           resultsFile = iperfFile.path;
         }
         await processIperfResults(
             helper: helper,
             resultsFile: resultsFile,
             send: send,
             recv: recv,
             deviceLocal: deviceLocal);
       } finally {
         await helper.sl4fDriver.ssh.run('killall iperf3.cmx');
       }
     }
   }

   void addIperfTest(String label, Protocol proto,
       {bool send = false, bool recv = false, bool deviceLocal = true}) {
     test(label, () async {
       final helper = await PerfTestHelper.make();
       try {
         await runIperfClientTests(helper, proto,
             send: send, recv: recv, deviceLocal: deviceLocal);
       } finally {
         // Kill the iperf3 server process.
         await helper.sl4fDriver.ssh.run('killall iperf3.cmx');
       }
     }, timeout: Timeout.none);
   }

   // Localhost tests where both ends of iperf3 sessions are within
   // the target device over loopback interface.
   // Run iperf3 client and capture both sender and receiver stats.
   addIperfTest('Localhost/TCP', Protocol.tcp, send: true, recv: true);
   addIperfTest('Localhost/UDP', Protocol.udp, send: true, recv: true);

   // Tests across host and target device
   //
   // Run iperf3 to capture data about the send only and receive only
   // performance of the target device, for TCP and UDP. Note that we
   // are only interested in the send/recv performance of the target device.
   addIperfTest('e2e/TCP/send', Protocol.tcp, send: true, deviceLocal: false);
   addIperfTest('e2e/TCP/recv', Protocol.tcp, recv: true, deviceLocal: false);
   addIperfTest('e2e/UDP/send', Protocol.udp, send: true, deviceLocal: false);
   addIperfTest('e2e/UDP/recv', Protocol.udp, recv: true, deviceLocal: false);
 }
	// Copyright 2020 The Fuchsia Authors. All rights reserved.
	// Use of this source code is governed by a BSD-style license that can be
	// found in the LICENSE file.

	import 'dart:convert';
	import 'dart:io';

	import 'package:meta/meta.dart';
	import 'package:sl4f/sl4f.dart';
	import 'package:test/test.dart';

	import 'helpers.dart';

	enum Protocol { udp, tcp }
	enum Direction { send, recv }

	// This test adds e2e performance benchmarks using iperf3 for TCP and UDP
	// traffic. This runs iperf3 in 2 ways:
	// - client and server both running in Fuchsia over loopback.
	// - server running in Fuchsia and client on the host.
	//
	// Some of the benchmarks are:
	// throughput - send/recv rate of transfer in bits/second
	// loss - number of UDP packets that were sent but failed to reach the
	// receiving application.
	// jitter - mean deviation of latency experienced by receiver in msec for UDP.
	// TODO(iyerm): CPU usage - Avg CPU usage during the iperf3 sessions.
	void main() {
	enableLoggingOutput();
	const componentUrl = 'fuchsia-pkg://fuchsia.com/iperf3#meta/iperf3.cmx';
	// TCP/UDP port number that the Fuchsia side will listen on.
	const port = 9001;

	// Process the json output from iperf3 and convert that to Catapult format.
	// 'send' indicates if the iperf output has device transmit stats.
	// 'recv' indicates if the iperf output has device receive stats.
	// 'deviceLocal' if the iperf sessions were local to the device over loopback.
	Future<void> processIperfResults(
	{@required bool send,
	@required bool recv,
	@required bool deviceLocal,
	@required PerfTestHelper helper,
	@required String resultsFile}) async {
	File localResultsFile;
	if (deviceLocal) {
	// Make a local copy of the json file generated by iperf3.
	localResultsFile =
	await helper.storage.dumpFile(resultsFile, 'iperf', 'json');
	} else {
	localResultsFile = File(resultsFile);
	}

	final List<Map<String, dynamic>> results = [];
	var iperfResults = jsonDecode(await localResultsFile.readAsString());
	// Retrieve records from iperf json.
	var setup = iperfResults['start']['test_start'];
	var protocol = setup['protocol'];
	var msgSize = setup['blksize'];
	var end = iperfResults['end'];
	var testSuite = 'fuchsia.netstack.iperf_benchmarks';

	Map<String, dynamic> sender;
	Map<String, dynamic> receiver;

	if (protocol == 'TCP') {
	sender = end['sum_sent'];
	receiver = end['sum_received'];
	} else {
	sender = end['sum'];
	// For UDP, there is no sum_received record, but we gather the
	// receiver information from server-output.
	var serverOutput = iperfResults['server_output_json'];
	receiver = serverOutput['end']['sum'];
	// server output summary contains only the sent-bytes, but
	// the interval data has the bytes transferred which we can
	// use to compute the received bit rate.
	if (!receiver['sender']) {
	var intervals = serverOutput['intervals'];
	int bytesTransferred = 0;
	for (var i in intervals) {
	bytesTransferred += i['sum']['bytes'];
	}
	receiver['bits_per_second'] =
	(bytesTransferred * 8) / receiver['seconds'];
	}
	}

	String testRun = '';
	if (deviceLocal) {
	testRun = 'lo/';
	}

	String unit(String key) {
	switch (key) {
	case 'bits_per_second':
	return 'count';
	case 'lost_packets':
	return 'count';
	case 'jitter_ms':
	return 'milliseconds';
	default:
	return 'unknown';
	}
	}

	// Translate iperf json to fuchsiaperf.json.
	if (send) {
	var key = 'bits_per_second';
	results.add({
	'label': '$testRun$protocol/send/${msgSize}bytes/$key',
	'test_suite': testSuite,
	'unit': unit(key),
	'values': [sender[key]],
	'split_first': false
	});
	}

	if (recv) {
	for (var key in receiver.keys) {
	if (key == 'bits_per_second' \|\|
	key == 'lost_packets' \|\|
	key == 'jitter_ms') {
	results.add({
	'label': '$testRun$protocol/recv/${msgSize}bytes/$key',
	'test_suite': testSuite,
	'unit': unit(key),
	'values': [receiver[key]],
	'split_first': false
	});
	}
	}
	}
	var fuchsiaperfFile = await Dump().writeAsString(
	'netstack_iperf_results', 'fuchsiaperf.json', jsonEncode(results));
	// Translate fuchsiaperf.json to Catapult format.
	await helper.performance.convertResults('runtime_deps/catapult_converter',
	fuchsiaperfFile, Platform.environment);
	}

	Future<void> startIperfServer(PerfTestHelper helper) async {
	// Start iperf server on the target device.
	await helper.sl4fDriver.ssh.start(
	'/bin/run $componentUrl --server --port $port --json',
	mode: ProcessStartMode.detached);

	// Poll for the server to have started listening for client
	// connection on the expected port.
	for (var i = 0; i < 5; i++) {
	await Future.delayed(Duration(seconds: 1));
	final inspect = Inspect(helper.sl4fDriver);
	final results =
	await inspect.snapshot(['netstack.cmx:Socket Info/*:LocalAddress']);
	if (results != null && results.isNotEmpty) {
	for (var j = 0; j < results.length; j++) {
	if (results[j]['payload'] != null &&
	results[j]['payload']['Socket Info'] != null) {
	for (final entry in results[j]['payload']['Socket Info'].entries) {
	if (entry.value['LocalAddress'] != null &&
	entry.value['LocalAddress'] == ':$port') {
	return;
	}
	}
	}
	}
	}
	}
	throw Sl4fException('Failed to start Iperf server.');
	}

	Future<void> runIperfClientTests(PerfTestHelper helper, Protocol proto,
	{bool send = true, bool recv = true, bool deviceLocal = true}) async {
	String protocolOption = '';
	String bwValue = '';
	String dirOption = '';
	String serverIp;

	if (proto == Protocol.udp) {
	protocolOption = '--udp';
	}

	if (deviceLocal) {
	// For localhost test, use maximum possible bandwidth.
	bwValue = '0';
	} else {
	// TODO(fxb/47782): Until we define separate link for ssh and data,
	// enforce a < 1Gbps rate on NUC7. After the bug is resolved, this can
	// be changed to '0' which means as much as the system and link can
	// transmit.
	bwValue = '100M';
	}

	if (send && !recv) {
	// This reverses the default direction of traffic flow such that
	// the target device sends traffic.
	dirOption = '--reverse';
	}

	if (deviceLocal) {
	serverIp = '127.0.0.1';
	} else {
	// TODO(fxb/47782): Currently, we are using the link used for ssh to also
	// inject data traffic. This is prone to interference to ssh and to the tests.
	// On NUC7, we can use a separate usb-ethernet interface for the test traffic.
	serverIp = helper.sl4fDriver.ssh.target;
	}

	var msgSizes = {64, 1024, 1400};
	for (var size in msgSizes) {
	try {
	var cmdArgs = [
	'--client',
	serverIp,
	'--port',
	'$port',
	'--length',
	'$size',
	'--json',
	protocolOption,
	'--bitrate',
	'$bwValue',
	dirOption,
	'--get-server-output'
	];
	await startIperfServer(helper);
	String resultsFile;
	if (deviceLocal) {
	resultsFile = '/tmp/iperf_results.json';
	var args = cmdArgs.join(' ');
	final result = await helper.sl4fDriver.ssh
	.run('/bin/run $componentUrl $args > $resultsFile');
	expect(result.exitCode, equals(0));
	} else {
	// Run iperf3 client from the host-tools.
	final hostPath =
	Platform.script.resolve('runtime_deps/iperf3').toFilePath();
	final result = await Process.run(hostPath, cmdArgs, runInShell: true);
	var iperfFile =
	await Dump().writeAsString('iperf', 'json', result.stdout);
	resultsFile = iperfFile.path;
	}
	await processIperfResults(
	helper: helper,
	resultsFile: resultsFile,
	send: send,
	recv: recv,
	deviceLocal: deviceLocal);
	} finally {
	await helper.sl4fDriver.ssh.run('killall iperf3.cmx');
	}
	}
	}

	void addIperfTest(String label, Protocol proto,
	{bool send = false, bool recv = false, bool deviceLocal = true}) {
	test(label, () async {
	final helper = await PerfTestHelper.make();
	try {
	await runIperfClientTests(helper, proto,
	send: send, recv: recv, deviceLocal: deviceLocal);
	} finally {
	// Kill the iperf3 server process.
	await helper.sl4fDriver.ssh.run('killall iperf3.cmx');
	}
	}, timeout: Timeout.none);
	}

	// Localhost tests where both ends of iperf3 sessions are within
	// the target device over loopback interface.
	// Run iperf3 client and capture both sender and receiver stats.
	addIperfTest('Localhost/TCP', Protocol.tcp, send: true, recv: true);
	addIperfTest('Localhost/UDP', Protocol.udp, send: true, recv: true);

	// Tests across host and target device
	//
	// Run iperf3 to capture data about the send only and receive only
	// performance of the target device, for TCP and UDP. Note that we
	// are only interested in the send/recv performance of the target device.
	addIperfTest('e2e/TCP/send', Protocol.tcp, send: true, deviceLocal: false);
	addIperfTest('e2e/TCP/recv', Protocol.tcp, recv: true, deviceLocal: false);
	addIperfTest('e2e/UDP/send', Protocol.udp, send: true, deviceLocal: false);
	addIperfTest('e2e/UDP/recv', Protocol.udp, recv: true, deviceLocal: false);
	}