Remove obsolete v8_benchmark. It was replaced with Octane on the perf bots.

chrome/test/data/v8_benchmark/richards.js

-// 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.
-
-
-var Richards = new BenchmarkSuite('Richards', 35302, [
-  new Benchmark("Richards", runRichards)
-]);
-
-
-/**
- * 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";
-};