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/*
* MIT License
*
* Copyright (c) 2017 atlarge-research
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in all
* copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
package nl.atlarge.opendc.topology.machine
import nl.atlarge.opendc.extension.destinations
import nl.atlarge.opendc.workload.Task
import nl.atlarge.opendc.kernel.Context
import nl.atlarge.opendc.kernel.Process
import nl.atlarge.opendc.topology.Entity
/**
* A Physical Machine (PM) inside a rack of a datacenter. It has a speed, and can be given a workload on which it will
* work until finished or interrupted.
*
* @author Fabian Mastenbroek (f.s.mastenbroek@student.tudelft.nl)
*/
class Machine : Entity<Machine.State>, Process<Machine> {
/**
* The status of a machine.
*/
enum class Status {
HALT, IDLE, RUNNING
}
/**
* The shape of the state of a [Machine] entity.
*/
data class State(val status: Status, val task: Task? = null)
/**
* The initial state of a [Machine] entity.
*/
override val initialState = State(Status.HALT)
/**
* Run the simulation kernel for this entity.
*/
override suspend fun Context<Machine>.run() {
update(State(Status.IDLE))
val cpus = outgoingEdges.destinations<Cpu>("cpu")
val speed = cpus.fold(0, { acc, (speed, cores) -> acc + speed * cores }).toLong()
var task: Task? = null
while (true) {
if (task != null) {
if (task.finished) {
task = null
update(State(Status.IDLE))
} else {
task.consume(speed * delta)
}
}
val msg = receive()
if (msg is Task) {
task = msg
update(State(Status.RUNNING, task))
}
}
}
}
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