From 2aa4a82499d4becd2284cdb482213d541b8804dd Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Sun, 28 Apr 2024 16:29:10 +0200 Subject: Adding upstream version 86.0.1. Signed-off-by: Daniel Baumann --- js/src/octane/richards.js | 539 ++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 539 insertions(+) create mode 100644 js/src/octane/richards.js (limited to 'js/src/octane/richards.js') diff --git a/js/src/octane/richards.js b/js/src/octane/richards.js new file mode 100644 index 0000000000..2cf027eae5 --- /dev/null +++ b/js/src/octane/richards.js @@ -0,0 +1,539 @@ +// 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", true, false, 8200, 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"; +}; -- cgit v1.2.3