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[benchmarks] Move Richards from internal benchmarks to SDK benchmarks
Change-Id: I523b8c29ff97235e2dec0fd50f67ee4e8cd4ef13 Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/195191 Commit-Queue: Stephen Adams <sra@google.com> Reviewed-by: Jonas Termansen <sortie@google.com>
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benchmarks/Richards/dart/Richards.dart
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446
benchmarks/Richards/dart/Richards.dart
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// Copyright 2006-2008 the V8 project authors. All rights reserved.
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// Redistribution and use in source and binary forms, with or without
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// modification, are permitted provided that the following conditions are
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// met:
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//
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// * Redistributions of source code must retain the above copyright
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// notice, this list of conditions and the following disclaimer.
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// * Redistributions in binary form must reproduce the above
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// copyright notice, this list of conditions and the following
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// disclaimer in the documentation and/or other materials provided
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// with the distribution.
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// * Neither the name of Google Inc. nor the names of its
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// contributors may be used to endorse or promote products derived
|
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// from this software without specific prior written permission.
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//
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
|
||||
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
|
||||
// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
|
||||
// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
|
||||
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
|
||||
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
|
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// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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// Ported by the Dart team to Dart.
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// This is a Dart implementation of the Richards benchmark from:
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//
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// http://www.cl.cam.ac.uk/~mr10/Bench.html
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//
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// The benchmark was originally implemented in BCPL by
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// Martin Richards.
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import 'package:benchmark_harness/benchmark_harness.dart';
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void main() {
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const Richards().report();
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}
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/// Richards imulates the task dispatcher of an operating system.
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class Richards extends BenchmarkBase {
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const Richards() : super('Richards');
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@override
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void run() {
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final Scheduler scheduler = Scheduler();
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scheduler.addIdleTask(ID_IDLE, 0, null, COUNT);
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Packet queue = Packet(null, ID_WORKER, KIND_WORK);
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queue = Packet(queue, ID_WORKER, KIND_WORK);
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scheduler.addWorkerTask(ID_WORKER, 1000, queue);
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queue = Packet(null, ID_DEVICE_A, KIND_DEVICE);
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queue = Packet(queue, ID_DEVICE_A, KIND_DEVICE);
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queue = Packet(queue, ID_DEVICE_A, KIND_DEVICE);
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scheduler.addHandlerTask(ID_HANDLER_A, 2000, queue);
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queue = Packet(null, ID_DEVICE_B, KIND_DEVICE);
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queue = Packet(queue, ID_DEVICE_B, KIND_DEVICE);
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queue = Packet(queue, ID_DEVICE_B, KIND_DEVICE);
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scheduler.addHandlerTask(ID_HANDLER_B, 3000, queue);
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scheduler.addDeviceTask(ID_DEVICE_A, 4000, null);
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scheduler.addDeviceTask(ID_DEVICE_B, 5000, null);
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scheduler.schedule();
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if (scheduler.queueCount != EXPECTED_QUEUE_COUNT ||
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scheduler.holdCount != EXPECTED_HOLD_COUNT) {
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print('Error during execution: queueCount = ${scheduler.queueCount}'
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', holdCount = ${scheduler.holdCount}.');
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}
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if (EXPECTED_QUEUE_COUNT != scheduler.queueCount) {
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throw 'bad scheduler queue-count';
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}
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if (EXPECTED_HOLD_COUNT != scheduler.holdCount) {
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throw 'bad scheduler hold-count';
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}
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}
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static const int DATA_SIZE = 4;
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static const int COUNT = 1000;
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/// These two constants specify how many times a packet is queued and
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/// how many times a task is put on hold in a correct run of richards.
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/// They don't have any meaning a such but are characteristic of a
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/// correct run so if the actual queue or hold count is different from
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/// the expected there must be a bug in the implementation.
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static const int EXPECTED_QUEUE_COUNT = 2322;
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static const int EXPECTED_HOLD_COUNT = 928;
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static const int ID_IDLE = 0;
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static const int ID_WORKER = 1;
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static const int ID_HANDLER_A = 2;
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static const int ID_HANDLER_B = 3;
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static const int ID_DEVICE_A = 4;
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static const int ID_DEVICE_B = 5;
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static const int NUMBER_OF_IDS = 6;
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static const int KIND_DEVICE = 0;
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static const int KIND_WORK = 1;
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}
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/// A scheduler can be used to schedule a set of tasks based on their relative
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/// priorities. Scheduling is done by maintaining a list of task control blocks
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/// which holds tasks and the data queue they are processing.
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class Scheduler {
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int queueCount = 0;
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int holdCount = 0;
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TaskControlBlock? currentTcb;
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int currentId = Richards.ID_IDLE;
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TaskControlBlock? list;
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final List<TaskControlBlock?> blocks =
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List<TaskControlBlock?>.filled(Richards.NUMBER_OF_IDS, null);
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/// Add an idle task to this scheduler.
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void addIdleTask(int id, int priority, Packet? queue, int count) {
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addRunningTask(id, priority, queue, IdleTask(this, 1, count));
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}
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/// Add a work task to this scheduler.
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void addWorkerTask(int id, int priority, Packet? queue) {
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addTask(id, priority, queue, WorkerTask(this, Richards.ID_HANDLER_A, 0));
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}
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/// Add a handler task to this scheduler.
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void addHandlerTask(int id, int priority, Packet? queue) {
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addTask(id, priority, queue, HandlerTask(this));
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}
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/// Add a handler task to this scheduler.
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void addDeviceTask(int id, int priority, Packet? queue) {
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addTask(id, priority, queue, DeviceTask(this));
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}
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/// Add the specified task and mark it as running.
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void addRunningTask(int id, int priority, Packet? queue, Task task) {
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addTask(id, priority, queue, task);
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currentTcb!.setRunning();
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}
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/// Add the specified task to this scheduler.
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void addTask(int id, int priority, Packet? queue, Task task) {
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currentTcb = TaskControlBlock(list, id, priority, queue, task);
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list = currentTcb;
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blocks[id] = currentTcb;
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}
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/// Execute the tasks managed by this scheduler.
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void schedule() {
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currentTcb = list;
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while (currentTcb != null) {
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if (currentTcb!.isHeldOrSuspended()) {
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currentTcb = currentTcb!.link;
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} else {
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currentId = currentTcb!.id;
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currentTcb = currentTcb!.run();
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}
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}
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}
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/// Release a task that is currently blocked and return the next block to run.
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TaskControlBlock? release(int id) {
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final TaskControlBlock? tcb = blocks[id];
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if (tcb == null) return tcb;
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tcb.markAsNotHeld();
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if (tcb.priority > currentTcb!.priority) return tcb;
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return currentTcb;
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}
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/// Block the currently executing task and return the next task control block
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/// to run. The blocked task will not be made runnable until it is explicitly
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/// released, even if new work is added to it.
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TaskControlBlock? holdCurrent() {
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holdCount++;
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currentTcb!.markAsHeld();
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return currentTcb!.link;
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}
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/// Suspend the currently executing task and return the next task
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/// control block to run.
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/// If new work is added to the suspended task it will be made runnable.
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TaskControlBlock suspendCurrent() {
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currentTcb!.markAsSuspended();
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return currentTcb!;
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}
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/// Add the specified packet to the end of the worklist used by the task
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/// associated with the packet and make the task runnable if it is currently
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/// suspended.
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TaskControlBlock? queue(Packet packet) {
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final TaskControlBlock? t = blocks[packet.id];
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if (t == null) return t;
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queueCount++;
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packet.link = null;
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packet.id = currentId;
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return t.checkPriorityAdd(currentTcb!, packet);
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}
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}
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/// A task control block manages a task and the queue of work packages
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/// associated with it.
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class TaskControlBlock {
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TaskControlBlock? link;
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int id; // The id of this block.
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int priority; // The priority of this block.
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Packet? queue; // The queue of packages to be processed by the task.
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Task task;
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int state;
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TaskControlBlock(this.link, this.id, this.priority, this.queue, this.task)
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: state = queue == null ? STATE_SUSPENDED : STATE_SUSPENDED_RUNNABLE;
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/// The task is running and is currently scheduled.
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static const int STATE_RUNNING = 0;
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/// The task has packets left to process.
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static const int STATE_RUNNABLE = 1;
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/// The task is not currently running. The task is not blocked as such and may
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/// be started by the scheduler.
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static const int STATE_SUSPENDED = 2;
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/// The task is blocked and cannot be run until it is explicitly released.
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static const int STATE_HELD = 4;
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static const int STATE_SUSPENDED_RUNNABLE = STATE_SUSPENDED | STATE_RUNNABLE;
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static const int STATE_NOT_HELD = ~STATE_HELD;
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void setRunning() {
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state = STATE_RUNNING;
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}
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void markAsNotHeld() {
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state = state & STATE_NOT_HELD;
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}
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void markAsHeld() {
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state = state | STATE_HELD;
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}
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bool isHeldOrSuspended() {
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return (state & STATE_HELD) != 0 || (state == STATE_SUSPENDED);
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}
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void markAsSuspended() {
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state = state | STATE_SUSPENDED;
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}
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void markAsRunnable() {
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state = state | STATE_RUNNABLE;
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}
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/// Runs this task, if it is ready to be run, and returns the next
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/// task to run.
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TaskControlBlock? run() {
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Packet? packet;
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if (state == STATE_SUSPENDED_RUNNABLE) {
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packet = queue;
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queue = packet!.link;
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state = queue == null ? STATE_RUNNING : STATE_RUNNABLE;
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} else {
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packet = null;
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}
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return task.run(packet);
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}
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/// Adds a packet to the worklist of this block's task, marks this as
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/// runnable if necessary, and returns the next runnable object to run
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/// (the one with the highest priority).
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TaskControlBlock checkPriorityAdd(TaskControlBlock task, Packet packet) {
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if (queue == null) {
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queue = packet;
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markAsRunnable();
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if (priority > task.priority) return this;
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} else {
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queue = packet.addTo(queue);
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}
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return task;
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}
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@override
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String toString() => 'tcb { $task@$state }';
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}
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/// Abstract task that manipulates work packets.
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abstract class Task {
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Scheduler scheduler; // The scheduler that manages this task.
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Task(this.scheduler);
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TaskControlBlock? run(Packet? packet);
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}
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/// An idle task doesn't do any work itself but cycles control between the two
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/// device tasks.
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class IdleTask extends Task {
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int v1; // A seed value that controls how the device tasks are scheduled.
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int count; // The number of times this task should be scheduled.
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IdleTask(Scheduler scheduler, this.v1, this.count) : super(scheduler);
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@override
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TaskControlBlock? run(Packet? packet) {
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count--;
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if (count == 0) return scheduler.holdCurrent();
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if ((v1 & 1) == 0) {
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v1 = v1 >> 1;
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return scheduler.release(Richards.ID_DEVICE_A);
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}
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v1 = (v1 >> 1) ^ 0xD008;
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return scheduler.release(Richards.ID_DEVICE_B);
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}
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@override
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String toString() => 'IdleTask';
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}
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/// A task that suspends itself after each time it has been run to simulate
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/// waiting for data from an external device.
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class DeviceTask extends Task {
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Packet? v1;
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DeviceTask(Scheduler scheduler) : super(scheduler);
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@override
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TaskControlBlock? run(Packet? packet) {
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if (packet == null) {
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if (v1 == null) return scheduler.suspendCurrent();
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final Packet v = v1!;
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v1 = null;
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return scheduler.queue(v);
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}
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v1 = packet;
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return scheduler.holdCurrent();
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}
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@override
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String toString() => 'DeviceTask';
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}
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/// A task that manipulates work packets.
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class WorkerTask extends Task {
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int v1; // A seed used to specify how work packets are manipulated.
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int v2; // Another seed used to specify how work packets are manipulated.
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WorkerTask(Scheduler scheduler, this.v1, this.v2) : super(scheduler);
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@override
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TaskControlBlock? run(Packet? packet) {
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if (packet == null) {
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return scheduler.suspendCurrent();
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}
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if (v1 == Richards.ID_HANDLER_A) {
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v1 = Richards.ID_HANDLER_B;
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} else {
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v1 = Richards.ID_HANDLER_A;
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}
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packet.id = v1;
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packet.a1 = 0;
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for (int i = 0; i < Richards.DATA_SIZE; i++) {
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v2++;
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if (v2 > 26) v2 = 1;
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packet.a2[i] = v2;
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}
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return scheduler.queue(packet);
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}
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@override
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String toString() => 'WorkerTask';
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}
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/// A task that manipulates work packets and then suspends itself.
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class HandlerTask extends Task {
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Packet? v1;
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Packet? v2;
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HandlerTask(Scheduler scheduler) : super(scheduler);
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@override
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TaskControlBlock? run(Packet? packet) {
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if (packet != null) {
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if (packet.kind == Richards.KIND_WORK) {
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v1 = packet.addTo(v1);
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} else {
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v2 = packet.addTo(v2);
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}
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}
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if (v1 != null) {
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final int count = v1!.a1;
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if (count < Richards.DATA_SIZE) {
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if (v2 != null) {
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final Packet v = v2!;
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v2 = v.link;
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v.a1 = v1!.a2[count];
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v1!.a1 = count + 1;
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return scheduler.queue(v);
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}
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} else {
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final Packet v = v1!;
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v1 = v.link;
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return scheduler.queue(v);
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}
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}
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return scheduler.suspendCurrent();
|
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}
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@override
|
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String toString() => 'HandlerTask';
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}
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/// A simple package of data that is manipulated by the tasks. The exact layout
|
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/// of the payload data carried by a packet is not importaint, and neither is
|
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/// the nature of the work performed on packets by the tasks. Besides carrying
|
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/// data, packets form linked lists and are hence used both as data and
|
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/// worklists.
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class Packet {
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Packet? link; // The tail of the linked list of packets.
|
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int id; // An ID for this packet.
|
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int kind; // The type of this packet.
|
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int a1 = 0;
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List<int> a2 = List<int>.filled(Richards.DATA_SIZE, 0);
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|
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Packet(this.link, this.id, this.kind);
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||||
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/// Add this packet to the end of a worklist, and return the worklist.
|
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Packet addTo(Packet? queue) {
|
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link = null;
|
||||
if (queue == null) return this;
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||||
Packet? peek;
|
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Packet next = queue;
|
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while ((peek = next.link) != null) {
|
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next = peek!;
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}
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next.link = this;
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return queue;
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}
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@override
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String toString() => 'Packet';
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}
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449
benchmarks/Richards/dart2/Richards.dart
Normal file
449
benchmarks/Richards/dart2/Richards.dart
Normal file
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@ -0,0 +1,449 @@
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// Copyright 2006-2008 the V8 project authors. All rights reserved.
|
||||
// Redistribution and use in source and binary forms, with or without
|
||||
// modification, are permitted provided that the following conditions are
|
||||
// met:
|
||||
//
|
||||
// * Redistributions of source code must retain the above copyright
|
||||
// notice, this list of conditions and the following disclaimer.
|
||||
// * Redistributions in binary form must reproduce the above
|
||||
// copyright notice, this list of conditions and the following
|
||||
// disclaimer in the documentation and/or other materials provided
|
||||
// with the distribution.
|
||||
// * Neither the name of Google Inc. nor the names of its
|
||||
// contributors may be used to endorse or promote products derived
|
||||
// from this software without specific prior written permission.
|
||||
//
|
||||
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
|
||||
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
|
||||
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
|
||||
// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
|
||||
// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
|
||||
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
|
||||
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
|
||||
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
|
||||
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
|
||||
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
|
||||
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
||||
|
||||
// Ported by the Dart team to Dart.
|
||||
|
||||
// This is a Dart implementation of the Richards benchmark from:
|
||||
//
|
||||
// http://www.cl.cam.ac.uk/~mr10/Bench.html
|
||||
//
|
||||
// The benchmark was originally implemented in BCPL by
|
||||
// Martin Richards.
|
||||
|
||||
// @dart=2.9
|
||||
|
||||
import 'package:benchmark_harness/benchmark_harness.dart';
|
||||
|
||||
void main() {
|
||||
const Richards().report();
|
||||
}
|
||||
|
||||
/// Richards imulates the task dispatcher of an operating system.
|
||||
class Richards extends BenchmarkBase {
|
||||
const Richards() : super('Richards');
|
||||
|
||||
@override
|
||||
void run() {
|
||||
final Scheduler scheduler = Scheduler();
|
||||
scheduler.addIdleTask(ID_IDLE, 0, null, COUNT);
|
||||
|
||||
Packet queue = Packet(null, ID_WORKER, KIND_WORK);
|
||||
queue = Packet(queue, ID_WORKER, KIND_WORK);
|
||||
scheduler.addWorkerTask(ID_WORKER, 1000, queue);
|
||||
|
||||
queue = Packet(null, ID_DEVICE_A, KIND_DEVICE);
|
||||
queue = Packet(queue, ID_DEVICE_A, KIND_DEVICE);
|
||||
queue = Packet(queue, ID_DEVICE_A, KIND_DEVICE);
|
||||
scheduler.addHandlerTask(ID_HANDLER_A, 2000, queue);
|
||||
|
||||
queue = Packet(null, ID_DEVICE_B, KIND_DEVICE);
|
||||
queue = Packet(queue, ID_DEVICE_B, KIND_DEVICE);
|
||||
queue = Packet(queue, ID_DEVICE_B, KIND_DEVICE);
|
||||
scheduler.addHandlerTask(ID_HANDLER_B, 3000, queue);
|
||||
|
||||
scheduler.addDeviceTask(ID_DEVICE_A, 4000, null);
|
||||
|
||||
scheduler.addDeviceTask(ID_DEVICE_B, 5000, null);
|
||||
|
||||
scheduler.schedule();
|
||||
|
||||
if (scheduler.queueCount != EXPECTED_QUEUE_COUNT ||
|
||||
scheduler.holdCount != EXPECTED_HOLD_COUNT) {
|
||||
print('Error during execution: queueCount = ${scheduler.queueCount}'
|
||||
', holdCount = ${scheduler.holdCount}.');
|
||||
}
|
||||
if (EXPECTED_QUEUE_COUNT != scheduler.queueCount) {
|
||||
throw 'bad scheduler queue-count';
|
||||
}
|
||||
if (EXPECTED_HOLD_COUNT != scheduler.holdCount) {
|
||||
throw 'bad scheduler hold-count';
|
||||
}
|
||||
}
|
||||
|
||||
static const int DATA_SIZE = 4;
|
||||
static const int COUNT = 1000;
|
||||
|
||||
/// These two constants specify how many times a packet is queued and
|
||||
/// how many times a task is put on hold in a correct run of richards.
|
||||
/// They don't have any meaning a such but are characteristic of a
|
||||
/// correct run so if the actual queue or hold count is different from
|
||||
/// the expected there must be a bug in the implementation.
|
||||
static const int EXPECTED_QUEUE_COUNT = 2322;
|
||||
static const int EXPECTED_HOLD_COUNT = 928;
|
||||
|
||||
static const int ID_IDLE = 0;
|
||||
static const int ID_WORKER = 1;
|
||||
static const int ID_HANDLER_A = 2;
|
||||
static const int ID_HANDLER_B = 3;
|
||||
static const int ID_DEVICE_A = 4;
|
||||
static const int ID_DEVICE_B = 5;
|
||||
static const int NUMBER_OF_IDS = 6;
|
||||
|
||||
static const int KIND_DEVICE = 0;
|
||||
static const int KIND_WORK = 1;
|
||||
}
|
||||
|
||||
/// A scheduler can be used to schedule a set of tasks based on their relative
|
||||
/// priorities. Scheduling is done by maintaining a list of task control blocks
|
||||
/// which holds tasks and the data queue they are processing.
|
||||
class Scheduler {
|
||||
int queueCount = 0;
|
||||
int holdCount = 0;
|
||||
TaskControlBlock currentTcb;
|
||||
int currentId;
|
||||
TaskControlBlock list;
|
||||
List<TaskControlBlock> blocks =
|
||||
List<TaskControlBlock>(Richards.NUMBER_OF_IDS);
|
||||
|
||||
/// Add an idle task to this scheduler.
|
||||
void addIdleTask(int id, int priority, Packet queue, int count) {
|
||||
addRunningTask(id, priority, queue, IdleTask(this, 1, count));
|
||||
}
|
||||
|
||||
/// Add a work task to this scheduler.
|
||||
void addWorkerTask(int id, int priority, Packet queue) {
|
||||
addTask(id, priority, queue, WorkerTask(this, Richards.ID_HANDLER_A, 0));
|
||||
}
|
||||
|
||||
/// Add a handler task to this scheduler.
|
||||
void addHandlerTask(int id, int priority, Packet queue) {
|
||||
addTask(id, priority, queue, HandlerTask(this));
|
||||
}
|
||||
|
||||
/// Add a handler task to this scheduler.
|
||||
void addDeviceTask(int id, int priority, Packet queue) {
|
||||
addTask(id, priority, queue, DeviceTask(this));
|
||||
}
|
||||
|
||||
/// Add the specified task and mark it as running.
|
||||
void addRunningTask(int id, int priority, Packet queue, Task task) {
|
||||
addTask(id, priority, queue, task);
|
||||
currentTcb.setRunning();
|
||||
}
|
||||
|
||||
/// Add the specified task to this scheduler.
|
||||
void addTask(int id, int priority, Packet queue, Task task) {
|
||||
currentTcb = TaskControlBlock(list, id, priority, queue, task);
|
||||
list = currentTcb;
|
||||
blocks[id] = currentTcb;
|
||||
}
|
||||
|
||||
/// Execute the tasks managed by this scheduler.
|
||||
void schedule() {
|
||||
currentTcb = list;
|
||||
while (currentTcb != null) {
|
||||
if (currentTcb.isHeldOrSuspended()) {
|
||||
currentTcb = currentTcb.link;
|
||||
} else {
|
||||
currentId = currentTcb.id;
|
||||
currentTcb = currentTcb.run();
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
/// Release a task that is currently blocked and return the next block to run.
|
||||
TaskControlBlock release(int id) {
|
||||
final TaskControlBlock tcb = blocks[id];
|
||||
if (tcb == null) return tcb;
|
||||
tcb.markAsNotHeld();
|
||||
if (tcb.priority > currentTcb.priority) return tcb;
|
||||
return currentTcb;
|
||||
}
|
||||
|
||||
/// Block the currently executing task and return the next task control block
|
||||
/// to run. The blocked task will not be made runnable until it is explicitly
|
||||
/// released, even if new work is added to it.
|
||||
TaskControlBlock holdCurrent() {
|
||||
holdCount++;
|
||||
currentTcb.markAsHeld();
|
||||
return currentTcb.link;
|
||||
}
|
||||
|
||||
/// Suspend the currently executing task and return the next task
|
||||
/// control block to run.
|
||||
/// If new work is added to the suspended task it will be made runnable.
|
||||
TaskControlBlock suspendCurrent() {
|
||||
currentTcb.markAsSuspended();
|
||||
return currentTcb;
|
||||
}
|
||||
|
||||
/// Add the specified packet to the end of the worklist used by the task
|
||||
/// associated with the packet and make the task runnable if it is currently
|
||||
/// suspended.
|
||||
TaskControlBlock queue(Packet packet) {
|
||||
final TaskControlBlock t = blocks[packet.id];
|
||||
if (t == null) return t;
|
||||
queueCount++;
|
||||
packet.link = null;
|
||||
packet.id = currentId;
|
||||
return t.checkPriorityAdd(currentTcb, packet);
|
||||
}
|
||||
}
|
||||
|
||||
/// A task control block manages a task and the queue of work packages
|
||||
/// associated with it.
|
||||
class TaskControlBlock {
|
||||
TaskControlBlock link;
|
||||
int id; // The id of this block.
|
||||
int priority; // The priority of this block.
|
||||
Packet queue; // The queue of packages to be processed by the task.
|
||||
Task task;
|
||||
int state;
|
||||
|
||||
TaskControlBlock(this.link, this.id, this.priority, this.queue, this.task) {
|
||||
state = queue == null ? STATE_SUSPENDED : STATE_SUSPENDED_RUNNABLE;
|
||||
}
|
||||
|
||||
/// The task is running and is currently scheduled.
|
||||
static const int STATE_RUNNING = 0;
|
||||
|
||||
/// The task has packets left to process.
|
||||
static const int STATE_RUNNABLE = 1;
|
||||
|
||||
/// The task is not currently running. The task is not blocked as such and may
|
||||
/// be started by the scheduler.
|
||||
static const int STATE_SUSPENDED = 2;
|
||||
|
||||
/// The task is blocked and cannot be run until it is explicitly released.
|
||||
static const int STATE_HELD = 4;
|
||||
|
||||
static const int STATE_SUSPENDED_RUNNABLE = STATE_SUSPENDED | STATE_RUNNABLE;
|
||||
static const int STATE_NOT_HELD = ~STATE_HELD;
|
||||
|
||||
void setRunning() {
|
||||
state = STATE_RUNNING;
|
||||
}
|
||||
|
||||
void markAsNotHeld() {
|
||||
state = state & STATE_NOT_HELD;
|
||||
}
|
||||
|
||||
void markAsHeld() {
|
||||
state = state | STATE_HELD;
|
||||
}
|
||||
|
||||
bool isHeldOrSuspended() {
|
||||
return (state & STATE_HELD) != 0 || (state == STATE_SUSPENDED);
|
||||
}
|
||||
|
||||
void markAsSuspended() {
|
||||
state = state | STATE_SUSPENDED;
|
||||
}
|
||||
|
||||
void markAsRunnable() {
|
||||
state = state | STATE_RUNNABLE;
|
||||
}
|
||||
|
||||
/// Runs this task, if it is ready to be run, and returns the next
|
||||
/// task to run.
|
||||
TaskControlBlock run() {
|
||||
Packet packet;
|
||||
if (state == STATE_SUSPENDED_RUNNABLE) {
|
||||
packet = queue;
|
||||
queue = packet.link;
|
||||
state = queue == null ? STATE_RUNNING : STATE_RUNNABLE;
|
||||
} else {
|
||||
packet = null;
|
||||
}
|
||||
return task.run(packet);
|
||||
}
|
||||
|
||||
/// Adds a packet to the worklist of this block's task, marks this as
|
||||
/// runnable if necessary, and returns the next runnable object to run
|
||||
/// (the one with the highest priority).
|
||||
TaskControlBlock checkPriorityAdd(TaskControlBlock task, Packet packet) {
|
||||
if (queue == null) {
|
||||
queue = packet;
|
||||
markAsRunnable();
|
||||
if (priority > task.priority) return this;
|
||||
} else {
|
||||
queue = packet.addTo(queue);
|
||||
}
|
||||
return task;
|
||||
}
|
||||
|
||||
@override
|
||||
String toString() => 'tcb { $task@$state }';
|
||||
}
|
||||
|
||||
/// Abstract task that manipulates work packets.
|
||||
abstract class Task {
|
||||
Scheduler scheduler; // The scheduler that manages this task.
|
||||
|
||||
Task(this.scheduler);
|
||||
|
||||
TaskControlBlock run(Packet packet);
|
||||
}
|
||||
|
||||
/// An idle task doesn't do any work itself but cycles control between the two
|
||||
/// device tasks.
|
||||
class IdleTask extends Task {
|
||||
int v1; // A seed value that controls how the device tasks are scheduled.
|
||||
int count; // The number of times this task should be scheduled.
|
||||
|
||||
IdleTask(Scheduler scheduler, this.v1, this.count) : super(scheduler);
|
||||
|
||||
@override
|
||||
TaskControlBlock run(Packet packet) {
|
||||
count--;
|
||||
if (count == 0) return scheduler.holdCurrent();
|
||||
if ((v1 & 1) == 0) {
|
||||
v1 = v1 >> 1;
|
||||
return scheduler.release(Richards.ID_DEVICE_A);
|
||||
}
|
||||
v1 = (v1 >> 1) ^ 0xD008;
|
||||
return scheduler.release(Richards.ID_DEVICE_B);
|
||||
}
|
||||
|
||||
@override
|
||||
String toString() => 'IdleTask';
|
||||
}
|
||||
|
||||
/// A task that suspends itself after each time it has been run to simulate
|
||||
/// waiting for data from an external device.
|
||||
class DeviceTask extends Task {
|
||||
Packet v1;
|
||||
|
||||
DeviceTask(Scheduler scheduler) : super(scheduler);
|
||||
|
||||
@override
|
||||
TaskControlBlock run(Packet packet) {
|
||||
if (packet == null) {
|
||||
if (v1 == null) return scheduler.suspendCurrent();
|
||||
final Packet v = v1;
|
||||
v1 = null;
|
||||
return scheduler.queue(v);
|
||||
}
|
||||
v1 = packet;
|
||||
return scheduler.holdCurrent();
|
||||
}
|
||||
|
||||
@override
|
||||
String toString() => 'DeviceTask';
|
||||
}
|
||||
|
||||
/// A task that manipulates work packets.
|
||||
class WorkerTask extends Task {
|
||||
int v1; // A seed used to specify how work packets are manipulated.
|
||||
int v2; // Another seed used to specify how work packets are manipulated.
|
||||
|
||||
WorkerTask(Scheduler scheduler, this.v1, this.v2) : super(scheduler);
|
||||
|
||||
@override
|
||||
TaskControlBlock run(Packet packet) {
|
||||
if (packet == null) {
|
||||
return scheduler.suspendCurrent();
|
||||
}
|
||||
if (v1 == Richards.ID_HANDLER_A) {
|
||||
v1 = Richards.ID_HANDLER_B;
|
||||
} else {
|
||||
v1 = Richards.ID_HANDLER_A;
|
||||
}
|
||||
packet.id = v1;
|
||||
packet.a1 = 0;
|
||||
for (int i = 0; i < Richards.DATA_SIZE; i++) {
|
||||
v2++;
|
||||
if (v2 > 26) v2 = 1;
|
||||
packet.a2[i] = v2;
|
||||
}
|
||||
return scheduler.queue(packet);
|
||||
}
|
||||
|
||||
@override
|
||||
String toString() => 'WorkerTask';
|
||||
}
|
||||
|
||||
/// A task that manipulates work packets and then suspends itself.
|
||||
class HandlerTask extends Task {
|
||||
Packet v1;
|
||||
Packet v2;
|
||||
|
||||
HandlerTask(Scheduler scheduler) : super(scheduler);
|
||||
|
||||
@override
|
||||
TaskControlBlock run(Packet packet) {
|
||||
if (packet != null) {
|
||||
if (packet.kind == Richards.KIND_WORK) {
|
||||
v1 = packet.addTo(v1);
|
||||
} else {
|
||||
v2 = packet.addTo(v2);
|
||||
}
|
||||
}
|
||||
if (v1 != null) {
|
||||
final int count = v1.a1;
|
||||
Packet v;
|
||||
if (count < Richards.DATA_SIZE) {
|
||||
if (v2 != null) {
|
||||
v = v2;
|
||||
v2 = v2.link;
|
||||
v.a1 = v1.a2[count];
|
||||
v1.a1 = count + 1;
|
||||
return scheduler.queue(v);
|
||||
}
|
||||
} else {
|
||||
v = v1;
|
||||
v1 = v1.link;
|
||||
return scheduler.queue(v);
|
||||
}
|
||||
}
|
||||
return scheduler.suspendCurrent();
|
||||
}
|
||||
|
||||
@override
|
||||
String toString() => 'HandlerTask';
|
||||
}
|
||||
|
||||
/// A simple package of data that is manipulated by the tasks. The exact layout
|
||||
/// of the payload data carried by a packet is not importaint, and neither is
|
||||
/// the nature of the work performed on packets by the tasks. Besides carrying
|
||||
/// data, packets form linked lists and are hence used both as data and
|
||||
/// worklists.
|
||||
class Packet {
|
||||
Packet link; // The tail of the linked list of packets.
|
||||
int id; // An ID for this packet.
|
||||
int kind; // The type of this packet.
|
||||
int a1 = 0;
|
||||
|
||||
List<int> a2 = List(Richards.DATA_SIZE);
|
||||
|
||||
Packet(this.link, this.id, this.kind);
|
||||
|
||||
/// Add this packet to the end of a worklist, and return the worklist.
|
||||
Packet addTo(Packet queue) {
|
||||
link = null;
|
||||
if (queue == null) return this;
|
||||
Packet peek, next = queue;
|
||||
while ((peek = next.link) != null) {
|
||||
next = peek;
|
||||
}
|
||||
next.link = this;
|
||||
return queue;
|
||||
}
|
||||
|
||||
@override
|
||||
String toString() => 'Packet';
|
||||
}
|
536
benchmarks/Richards/javascript/Richards.js
Normal file
536
benchmarks/Richards/javascript/Richards.js
Normal file
|
@ -0,0 +1,536 @@
|
|||
// Copyright 2006-2008 the V8 project authors. All rights reserved.
|
||||
// Redistribution and use in source and binary forms, with or without
|
||||
// modification, are permitted provided that the following conditions are
|
||||
// met:
|
||||
//
|
||||
// * Redistributions of source code must retain the above copyright
|
||||
// notice, this list of conditions and the following disclaimer.
|
||||
// * Redistributions in binary form must reproduce the above
|
||||
// copyright notice, this list of conditions and the following
|
||||
// disclaimer in the documentation and/or other materials provided
|
||||
// with the distribution.
|
||||
// * Neither the name of Google Inc. nor the names of its
|
||||
// contributors may be used to endorse or promote products derived
|
||||
// from this software without specific prior written permission.
|
||||
//
|
||||
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
|
||||
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
|
||||
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
|
||||
// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
|
||||
// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
|
||||
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
|
||||
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
|
||||
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
|
||||
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
|
||||
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
|
||||
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
||||
|
||||
|
||||
// This is a JavaScript implementation of the Richards
|
||||
// benchmark from:
|
||||
//
|
||||
// http://www.cl.cam.ac.uk/~mr10/Bench.html
|
||||
//
|
||||
// The benchmark was originally implemented in BCPL by
|
||||
// Martin Richards.
|
||||
|
||||
|
||||
/**
|
||||
* The Richards benchmark simulates the task dispatcher of an
|
||||
* operating system.
|
||||
**/
|
||||
function runRichards() {
|
||||
var scheduler = new Scheduler();
|
||||
scheduler.addIdleTask(ID_IDLE, 0, null, COUNT);
|
||||
|
||||
var queue = new Packet(null, ID_WORKER, KIND_WORK);
|
||||
queue = new Packet(queue, ID_WORKER, KIND_WORK);
|
||||
scheduler.addWorkerTask(ID_WORKER, 1000, queue);
|
||||
|
||||
queue = new Packet(null, ID_DEVICE_A, KIND_DEVICE);
|
||||
queue = new Packet(queue, ID_DEVICE_A, KIND_DEVICE);
|
||||
queue = new Packet(queue, ID_DEVICE_A, KIND_DEVICE);
|
||||
scheduler.addHandlerTask(ID_HANDLER_A, 2000, queue);
|
||||
|
||||
queue = new Packet(null, ID_DEVICE_B, KIND_DEVICE);
|
||||
queue = new Packet(queue, ID_DEVICE_B, KIND_DEVICE);
|
||||
queue = new Packet(queue, ID_DEVICE_B, KIND_DEVICE);
|
||||
scheduler.addHandlerTask(ID_HANDLER_B, 3000, queue);
|
||||
|
||||
scheduler.addDeviceTask(ID_DEVICE_A, 4000, null);
|
||||
|
||||
scheduler.addDeviceTask(ID_DEVICE_B, 5000, null);
|
||||
|
||||
scheduler.schedule();
|
||||
|
||||
if (scheduler.queueCount != EXPECTED_QUEUE_COUNT ||
|
||||
scheduler.holdCount != EXPECTED_HOLD_COUNT) {
|
||||
var msg =
|
||||
"Error during execution: queueCount = " + scheduler.queueCount +
|
||||
", holdCount = " + scheduler.holdCount + ".";
|
||||
throw new Error(msg);
|
||||
}
|
||||
}
|
||||
|
||||
var COUNT = 1000;
|
||||
|
||||
/**
|
||||
* These two constants specify how many times a packet is queued and
|
||||
* how many times a task is put on hold in a correct run of richards.
|
||||
* They don't have any meaning a such but are characteristic of a
|
||||
* correct run so if the actual queue or hold count is different from
|
||||
* the expected there must be a bug in the implementation.
|
||||
**/
|
||||
var EXPECTED_QUEUE_COUNT = 2322;
|
||||
var EXPECTED_HOLD_COUNT = 928;
|
||||
|
||||
|
||||
/**
|
||||
* A scheduler can be used to schedule a set of tasks based on their relative
|
||||
* priorities. Scheduling is done by maintaining a list of task control blocks
|
||||
* which holds tasks and the data queue they are processing.
|
||||
* @constructor
|
||||
*/
|
||||
function Scheduler() {
|
||||
this.queueCount = 0;
|
||||
this.holdCount = 0;
|
||||
this.blocks = new Array(NUMBER_OF_IDS);
|
||||
this.list = null;
|
||||
this.currentTcb = null;
|
||||
this.currentId = null;
|
||||
}
|
||||
|
||||
var ID_IDLE = 0;
|
||||
var ID_WORKER = 1;
|
||||
var ID_HANDLER_A = 2;
|
||||
var ID_HANDLER_B = 3;
|
||||
var ID_DEVICE_A = 4;
|
||||
var ID_DEVICE_B = 5;
|
||||
var NUMBER_OF_IDS = 6;
|
||||
|
||||
var KIND_DEVICE = 0;
|
||||
var KIND_WORK = 1;
|
||||
|
||||
/**
|
||||
* Add an idle task to this scheduler.
|
||||
* @param {int} id the identity of the task
|
||||
* @param {int} priority the task's priority
|
||||
* @param {Packet} queue the queue of work to be processed by the task
|
||||
* @param {int} count the number of times to schedule the task
|
||||
*/
|
||||
Scheduler.prototype.addIdleTask = function (id, priority, queue, count) {
|
||||
this.addRunningTask(id, priority, queue, new IdleTask(this, 1, count));
|
||||
};
|
||||
|
||||
/**
|
||||
* Add a work task to this scheduler.
|
||||
* @param {int} id the identity of the task
|
||||
* @param {int} priority the task's priority
|
||||
* @param {Packet} queue the queue of work to be processed by the task
|
||||
*/
|
||||
Scheduler.prototype.addWorkerTask = function (id, priority, queue) {
|
||||
this.addTask(id, priority, queue, new WorkerTask(this, ID_HANDLER_A, 0));
|
||||
};
|
||||
|
||||
/**
|
||||
* Add a handler task to this scheduler.
|
||||
* @param {int} id the identity of the task
|
||||
* @param {int} priority the task's priority
|
||||
* @param {Packet} queue the queue of work to be processed by the task
|
||||
*/
|
||||
Scheduler.prototype.addHandlerTask = function (id, priority, queue) {
|
||||
this.addTask(id, priority, queue, new HandlerTask(this));
|
||||
};
|
||||
|
||||
/**
|
||||
* Add a handler task to this scheduler.
|
||||
* @param {int} id the identity of the task
|
||||
* @param {int} priority the task's priority
|
||||
* @param {Packet} queue the queue of work to be processed by the task
|
||||
*/
|
||||
Scheduler.prototype.addDeviceTask = function (id, priority, queue) {
|
||||
this.addTask(id, priority, queue, new DeviceTask(this))
|
||||
};
|
||||
|
||||
/**
|
||||
* Add the specified task and mark it as running.
|
||||
* @param {int} id the identity of the task
|
||||
* @param {int} priority the task's priority
|
||||
* @param {Packet} queue the queue of work to be processed by the task
|
||||
* @param {Task} task the task to add
|
||||
*/
|
||||
Scheduler.prototype.addRunningTask = function (id, priority, queue, task) {
|
||||
this.addTask(id, priority, queue, task);
|
||||
this.currentTcb.setRunning();
|
||||
};
|
||||
|
||||
/**
|
||||
* Add the specified task to this scheduler.
|
||||
* @param {int} id the identity of the task
|
||||
* @param {int} priority the task's priority
|
||||
* @param {Packet} queue the queue of work to be processed by the task
|
||||
* @param {Task} task the task to add
|
||||
*/
|
||||
Scheduler.prototype.addTask = function (id, priority, queue, task) {
|
||||
this.currentTcb = new TaskControlBlock(this.list, id, priority, queue, task);
|
||||
this.list = this.currentTcb;
|
||||
this.blocks[id] = this.currentTcb;
|
||||
};
|
||||
|
||||
/**
|
||||
* Execute the tasks managed by this scheduler.
|
||||
*/
|
||||
Scheduler.prototype.schedule = function () {
|
||||
this.currentTcb = this.list;
|
||||
while (this.currentTcb != null) {
|
||||
if (this.currentTcb.isHeldOrSuspended()) {
|
||||
this.currentTcb = this.currentTcb.link;
|
||||
} else {
|
||||
this.currentId = this.currentTcb.id;
|
||||
this.currentTcb = this.currentTcb.run();
|
||||
}
|
||||
}
|
||||
};
|
||||
|
||||
/**
|
||||
* Release a task that is currently blocked and return the next block to run.
|
||||
* @param {int} id the id of the task to suspend
|
||||
*/
|
||||
Scheduler.prototype.release = function (id) {
|
||||
var tcb = this.blocks[id];
|
||||
if (tcb == null) return tcb;
|
||||
tcb.markAsNotHeld();
|
||||
if (tcb.priority > this.currentTcb.priority) {
|
||||
return tcb;
|
||||
} else {
|
||||
return this.currentTcb;
|
||||
}
|
||||
};
|
||||
|
||||
/**
|
||||
* Block the currently executing task and return the next task control block
|
||||
* to run. The blocked task will not be made runnable until it is explicitly
|
||||
* released, even if new work is added to it.
|
||||
*/
|
||||
Scheduler.prototype.holdCurrent = function () {
|
||||
this.holdCount++;
|
||||
this.currentTcb.markAsHeld();
|
||||
return this.currentTcb.link;
|
||||
};
|
||||
|
||||
/**
|
||||
* Suspend the currently executing task and return the next task control block
|
||||
* to run. If new work is added to the suspended task it will be made runnable.
|
||||
*/
|
||||
Scheduler.prototype.suspendCurrent = function () {
|
||||
this.currentTcb.markAsSuspended();
|
||||
return this.currentTcb;
|
||||
};
|
||||
|
||||
/**
|
||||
* Add the specified packet to the end of the worklist used by the task
|
||||
* associated with the packet and make the task runnable if it is currently
|
||||
* suspended.
|
||||
* @param {Packet} packet the packet to add
|
||||
*/
|
||||
Scheduler.prototype.queue = function (packet) {
|
||||
var t = this.blocks[packet.id];
|
||||
if (t == null) return t;
|
||||
this.queueCount++;
|
||||
packet.link = null;
|
||||
packet.id = this.currentId;
|
||||
return t.checkPriorityAdd(this.currentTcb, packet);
|
||||
};
|
||||
|
||||
/**
|
||||
* A task control block manages a task and the queue of work packages associated
|
||||
* with it.
|
||||
* @param {TaskControlBlock} link the preceding block in the linked block list
|
||||
* @param {int} id the id of this block
|
||||
* @param {int} priority the priority of this block
|
||||
* @param {Packet} queue the queue of packages to be processed by the task
|
||||
* @param {Task} task the task
|
||||
* @constructor
|
||||
*/
|
||||
function TaskControlBlock(link, id, priority, queue, task) {
|
||||
this.link = link;
|
||||
this.id = id;
|
||||
this.priority = priority;
|
||||
this.queue = queue;
|
||||
this.task = task;
|
||||
if (queue == null) {
|
||||
this.state = STATE_SUSPENDED;
|
||||
} else {
|
||||
this.state = STATE_SUSPENDED_RUNNABLE;
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* The task is running and is currently scheduled.
|
||||
*/
|
||||
var STATE_RUNNING = 0;
|
||||
|
||||
/**
|
||||
* The task has packets left to process.
|
||||
*/
|
||||
var STATE_RUNNABLE = 1;
|
||||
|
||||
/**
|
||||
* The task is not currently running. The task is not blocked as such and may
|
||||
* be started by the scheduler.
|
||||
*/
|
||||
var STATE_SUSPENDED = 2;
|
||||
|
||||
/**
|
||||
* The task is blocked and cannot be run until it is explicitly released.
|
||||
*/
|
||||
var STATE_HELD = 4;
|
||||
|
||||
var STATE_SUSPENDED_RUNNABLE = STATE_SUSPENDED | STATE_RUNNABLE;
|
||||
var STATE_NOT_HELD = ~STATE_HELD;
|
||||
|
||||
TaskControlBlock.prototype.setRunning = function () {
|
||||
this.state = STATE_RUNNING;
|
||||
};
|
||||
|
||||
TaskControlBlock.prototype.markAsNotHeld = function () {
|
||||
this.state = this.state & STATE_NOT_HELD;
|
||||
};
|
||||
|
||||
TaskControlBlock.prototype.markAsHeld = function () {
|
||||
this.state = this.state | STATE_HELD;
|
||||
};
|
||||
|
||||
TaskControlBlock.prototype.isHeldOrSuspended = function () {
|
||||
return (this.state & STATE_HELD) != 0 || (this.state == STATE_SUSPENDED);
|
||||
};
|
||||
|
||||
TaskControlBlock.prototype.markAsSuspended = function () {
|
||||
this.state = this.state | STATE_SUSPENDED;
|
||||
};
|
||||
|
||||
TaskControlBlock.prototype.markAsRunnable = function () {
|
||||
this.state = this.state | STATE_RUNNABLE;
|
||||
};
|
||||
|
||||
/**
|
||||
* Runs this task, if it is ready to be run, and returns the next task to run.
|
||||
*/
|
||||
TaskControlBlock.prototype.run = function () {
|
||||
var packet;
|
||||
if (this.state == STATE_SUSPENDED_RUNNABLE) {
|
||||
packet = this.queue;
|
||||
this.queue = packet.link;
|
||||
if (this.queue == null) {
|
||||
this.state = STATE_RUNNING;
|
||||
} else {
|
||||
this.state = STATE_RUNNABLE;
|
||||
}
|
||||
} else {
|
||||
packet = null;
|
||||
}
|
||||
return this.task.run(packet);
|
||||
};
|
||||
|
||||
/**
|
||||
* Adds a packet to the worklist of this block's task, marks this as runnable if
|
||||
* necessary, and returns the next runnable object to run (the one
|
||||
* with the highest priority).
|
||||
*/
|
||||
TaskControlBlock.prototype.checkPriorityAdd = function (task, packet) {
|
||||
if (this.queue == null) {
|
||||
this.queue = packet;
|
||||
this.markAsRunnable();
|
||||
if (this.priority > task.priority) return this;
|
||||
} else {
|
||||
this.queue = packet.addTo(this.queue);
|
||||
}
|
||||
return task;
|
||||
};
|
||||
|
||||
TaskControlBlock.prototype.toString = function () {
|
||||
return "tcb { " + this.task + "@" + this.state + " }";
|
||||
};
|
||||
|
||||
/**
|
||||
* An idle task doesn't do any work itself but cycles control between the two
|
||||
* device tasks.
|
||||
* @param {Scheduler} scheduler the scheduler that manages this task
|
||||
* @param {int} v1 a seed value that controls how the device tasks are scheduled
|
||||
* @param {int} count the number of times this task should be scheduled
|
||||
* @constructor
|
||||
*/
|
||||
function IdleTask(scheduler, v1, count) {
|
||||
this.scheduler = scheduler;
|
||||
this.v1 = v1;
|
||||
this.count = count;
|
||||
}
|
||||
|
||||
IdleTask.prototype.run = function (packet) {
|
||||
this.count--;
|
||||
if (this.count == 0) return this.scheduler.holdCurrent();
|
||||
if ((this.v1 & 1) == 0) {
|
||||
this.v1 = this.v1 >> 1;
|
||||
return this.scheduler.release(ID_DEVICE_A);
|
||||
} else {
|
||||
this.v1 = (this.v1 >> 1) ^ 0xD008;
|
||||
return this.scheduler.release(ID_DEVICE_B);
|
||||
}
|
||||
};
|
||||
|
||||
IdleTask.prototype.toString = function () {
|
||||
return "IdleTask"
|
||||
};
|
||||
|
||||
/**
|
||||
* A task that suspends itself after each time it has been run to simulate
|
||||
* waiting for data from an external device.
|
||||
* @param {Scheduler} scheduler the scheduler that manages this task
|
||||
* @constructor
|
||||
*/
|
||||
function DeviceTask(scheduler) {
|
||||
this.scheduler = scheduler;
|
||||
this.v1 = null;
|
||||
}
|
||||
|
||||
DeviceTask.prototype.run = function (packet) {
|
||||
if (packet == null) {
|
||||
if (this.v1 == null) return this.scheduler.suspendCurrent();
|
||||
var v = this.v1;
|
||||
this.v1 = null;
|
||||
return this.scheduler.queue(v);
|
||||
} else {
|
||||
this.v1 = packet;
|
||||
return this.scheduler.holdCurrent();
|
||||
}
|
||||
};
|
||||
|
||||
DeviceTask.prototype.toString = function () {
|
||||
return "DeviceTask";
|
||||
};
|
||||
|
||||
/**
|
||||
* A task that manipulates work packets.
|
||||
* @param {Scheduler} scheduler the scheduler that manages this task
|
||||
* @param {int} v1 a seed used to specify how work packets are manipulated
|
||||
* @param {int} v2 another seed used to specify how work packets are manipulated
|
||||
* @constructor
|
||||
*/
|
||||
function WorkerTask(scheduler, v1, v2) {
|
||||
this.scheduler = scheduler;
|
||||
this.v1 = v1;
|
||||
this.v2 = v2;
|
||||
}
|
||||
|
||||
WorkerTask.prototype.run = function (packet) {
|
||||
if (packet == null) {
|
||||
return this.scheduler.suspendCurrent();
|
||||
} else {
|
||||
if (this.v1 == ID_HANDLER_A) {
|
||||
this.v1 = ID_HANDLER_B;
|
||||
} else {
|
||||
this.v1 = ID_HANDLER_A;
|
||||
}
|
||||
packet.id = this.v1;
|
||||
packet.a1 = 0;
|
||||
for (var i = 0; i < DATA_SIZE; i++) {
|
||||
this.v2++;
|
||||
if (this.v2 > 26) this.v2 = 1;
|
||||
packet.a2[i] = this.v2;
|
||||
}
|
||||
return this.scheduler.queue(packet);
|
||||
}
|
||||
};
|
||||
|
||||
WorkerTask.prototype.toString = function () {
|
||||
return "WorkerTask";
|
||||
};
|
||||
|
||||
/**
|
||||
* A task that manipulates work packets and then suspends itself.
|
||||
* @param {Scheduler} scheduler the scheduler that manages this task
|
||||
* @constructor
|
||||
*/
|
||||
function HandlerTask(scheduler) {
|
||||
this.scheduler = scheduler;
|
||||
this.v1 = null;
|
||||
this.v2 = null;
|
||||
}
|
||||
|
||||
HandlerTask.prototype.run = function (packet) {
|
||||
if (packet != null) {
|
||||
if (packet.kind == KIND_WORK) {
|
||||
this.v1 = packet.addTo(this.v1);
|
||||
} else {
|
||||
this.v2 = packet.addTo(this.v2);
|
||||
}
|
||||
}
|
||||
if (this.v1 != null) {
|
||||
var count = this.v1.a1;
|
||||
var v;
|
||||
if (count < DATA_SIZE) {
|
||||
if (this.v2 != null) {
|
||||
v = this.v2;
|
||||
this.v2 = this.v2.link;
|
||||
v.a1 = this.v1.a2[count];
|
||||
this.v1.a1 = count + 1;
|
||||
return this.scheduler.queue(v);
|
||||
}
|
||||
} else {
|
||||
v = this.v1;
|
||||
this.v1 = this.v1.link;
|
||||
return this.scheduler.queue(v);
|
||||
}
|
||||
}
|
||||
return this.scheduler.suspendCurrent();
|
||||
};
|
||||
|
||||
HandlerTask.prototype.toString = function () {
|
||||
return "HandlerTask";
|
||||
};
|
||||
|
||||
/* --- *
|
||||
* P a c k e t
|
||||
* --- */
|
||||
|
||||
var DATA_SIZE = 4;
|
||||
|
||||
/**
|
||||
* A simple package of data that is manipulated by the tasks. The exact layout
|
||||
* of the payload data carried by a packet is not importaint, and neither is the
|
||||
* nature of the work performed on packets by the tasks.
|
||||
*
|
||||
* Besides carrying data, packets form linked lists and are hence used both as
|
||||
* data and worklists.
|
||||
* @param {Packet} link the tail of the linked list of packets
|
||||
* @param {int} id an ID for this packet
|
||||
* @param {int} kind the type of this packet
|
||||
* @constructor
|
||||
*/
|
||||
function Packet(link, id, kind) {
|
||||
this.link = link;
|
||||
this.id = id;
|
||||
this.kind = kind;
|
||||
this.a1 = 0;
|
||||
this.a2 = new Array(DATA_SIZE);
|
||||
}
|
||||
|
||||
/**
|
||||
* Add this packet to the end of a worklist, and return the worklist.
|
||||
* @param {Packet} queue the worklist to add this packet to
|
||||
*/
|
||||
Packet.prototype.addTo = function (queue) {
|
||||
this.link = null;
|
||||
if (queue == null) return this;
|
||||
var peek, next = queue;
|
||||
while ((peek = next.link) != null)
|
||||
next = peek;
|
||||
next.link = this;
|
||||
return queue;
|
||||
};
|
||||
|
||||
Packet.prototype.toString = function () {
|
||||
return "Packet";
|
||||
};
|
||||
|
||||
Benchmark.report("Richards", runRichards);
|
Loading…
Reference in a new issue