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96d40d1caa
This is a preparation CL to remove the --enable-isolate-groups flag in the VM. The following tests were only running in --no-enable-isolate-groups and are therefore obsolete now: - runtime/tests/vm/dart/regress_47468_test.dart - runtime/tests/vm/dart_2/regress_47468_test.dart - tests/lib/isolate/illegal_msg_function_test.dart - tests/lib_2/isolate/illegal_msg_function_test.dart TEST=Changes tests only. Change-Id: I6257cb667eebca66a649614d3010139dd2cdd3ab Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/219100 Reviewed-by: Alexander Aprelev <aam@google.com> Commit-Queue: Martin Kustermann <kustermann@google.com>
65 lines
2.0 KiB
Dart
65 lines
2.0 KiB
Dart
// Copyright (c) 2021, the Dart project authors. Please see the AUTHORS file
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// for details. All rights reserved. Use of this source code is governed by a
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// BSD-style license that can be found in the LICENSE file.
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import 'dart:async';
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import 'dart:io';
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import 'dart:isolate';
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import 'dart:math';
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import 'package:expect/expect.dart';
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// Implements recursive summation via tail calls:
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// fib(n) => n <= 1 ? 1
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// : fib(n-1) + fib(n-2);
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Future fibonacciRecursive(List args) async {
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final SendPort port = args[0];
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final n = args[1];
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if (n <= 1) {
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port.send(1);
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return;
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}
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final left = ReceivePort();
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final right = ReceivePort();
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await Future.wait([
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Isolate.spawn(fibonacciRecursive, [left.sendPort, n - 1]),
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Isolate.spawn(fibonacciRecursive, [right.sendPort, n - 2]),
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]);
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final results = await Future.wait([left.first, right.first]);
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port.send(results[0] + results[1]);
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}
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Future<void> main() async {
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final rpWarmup = ReceivePort();
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final rpRun = ReceivePort();
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final int nWarmup = 17; // enough runs to trigger optimized compilation
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final int nWarmupFactorial = 2584;
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// Runs for about 8 seconds.
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final int n = 21;
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final int nFactorial = 17711;
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final beforeRss = ProcessInfo.currentRss;
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int maxRss = beforeRss;
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final rssTimer = Timer.periodic(const Duration(milliseconds: 10), (_) {
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maxRss = max(ProcessInfo.currentRss, maxRss);
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});
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final watch = Stopwatch();
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watch.start();
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// Warm up code by running a couple iterations in the main isolate.
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await Isolate.spawn(fibonacciRecursive, [rpWarmup.sendPort, nWarmup]);
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Expect.equals(nWarmupFactorial, await rpWarmup.first);
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final warmup = watch.elapsedMicroseconds;
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await Isolate.spawn(fibonacciRecursive, [rpRun.sendPort, n]);
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Expect.equals(nFactorial, await rpRun.first);
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final done = watch.elapsedMicroseconds;
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print('IsolateFibonacci_$n.Calculation(RunTimeRaw): ${done - warmup} us.');
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print('IsolateFibonacci_$n.DeltaPeak(MemoryUse): ${maxRss - beforeRss}');
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rssTimer.cancel();
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}
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