X-Git-Url: http://info.iut-bm.univ-fcomte.fr/pub/gitweb/simgrid.git/blobdiff_plain/8e8f8b64b899284cbd166542ba352cd0c44059e8..a96479d66281806d9e372a705a1bdf4ebf6f8c84:/src/bindings/java/org/simgrid/msg/VM.java diff --git a/src/bindings/java/org/simgrid/msg/VM.java b/src/bindings/java/org/simgrid/msg/VM.java index 785c3df89f..f9c961c834 100644 --- a/src/bindings/java/org/simgrid/msg/VM.java +++ b/src/bindings/java/org/simgrid/msg/VM.java @@ -1,73 +1,131 @@ -/* - * JNI interface to Cloud interface in Simgrid - * - * Copyright 2006-2012 The SimGrid Team. - * All right reserved. - * - * This program is free software; you can redistribute - * it and/or modify it under the terms of the license - * (GNU LGPL) which comes with this package. - */ +/* JNI interface to virtual machine in Simgrid */ + +/* Copyright (c) 2006-2014. The SimGrid Team. All rights reserved. */ + +/* This program is free software; you can redistribute it and/or modify it + * under the terms of the license (GNU LGPL) which comes with this package. */ + package org.simgrid.msg; +import java.util.ArrayList; -import org.simgrid.msg.Host; -import org.simgrid.msg.Process; +public class VM extends Host { + // No need to declare a new bind variable: we use the one inherited from the super class Host + + /* Static functions */ + + private static ArrayList vms= new ArrayList<>(); + private Host currentHost; + + /** Create a `basic' VM (i.e. 1GB of RAM, other values are not taken into account). */ + public VM(Host host, String name) { + this(host,name,1024, 0, 0); + } -public class VM { /** - * This attribute represents a bind between a java task object and - * a native task. Even if this attribute is public you must never - * access to it. It is set automatically during the build of the object. + * Create a VM + * @param host Host node + * @param name name of the machine + * @param ramSize size of the RAM that should be allocated (in MBytes) + * @param migNetSpeed (network bandwith allocated for migrations in MB/s, if you don't know put zero ;)) + * @param dpIntensity (dirty page percentage according to migNetSpeed, [0-100], if you don't know put zero ;)) */ - private long bind = 0; - - private int coreAmount; + public VM(Host host, String name, int ramSize, int migNetSpeed, int dpIntensity){ + super(); + super.name = name; + this.currentHost = host; + create(host, name, ramSize, migNetSpeed, dpIntensity); + vms.add(this); + } - private String name; - /** - * Create a new empty VM. - * NOTE: it is expected that in the future, the coreAmount parameter will be used - * to add extra constraints on the execution, but the argument is ignored for now. + public static VM[] all(){ + VM[] allvms = new VM[vms.size()]; + vms.toArray(allvms); + return allvms; + } + + public static VM getVMByName(String name){ + for (VM vm : vms){ + if (vm.getName().equals(name)) + return vm; + } + return null; + } + + /** Kills all the actors running on that VM + * + * Actually, this strictly equivalent to shutdown(). + * In C and in libvirt, the destroy function also releases the memory associated to the VM, + * but this is not the way it goes in Java. The VM will only get destroyed by the garbage + * collector when it is not referenced anymore by your variables. So, to see the VM really + * destroyed, don't call this function but simply release any ref you have on it. */ - public VM(Host host, String name, int coreAmount) { - this.coreAmount = coreAmount; - this.name = name; - start(host,name,coreAmount); + public void destroy() { + shutdown(); } - protected void finalize() { - destroy(); + + /* Make sure that the GC also destroys the C object */ + protected void finalize() throws Throwable { + nativeFinalize(); } + public native void nativeFinalize(); + + /** Returns whether the given VM is currently suspended */ + public native int isCreated(); + + /** Returns whether the given VM is currently running */ + public native int isRunning(); + + /** Returns whether the given VM is currently running */ + public native int isMigrating(); + + /** Returns whether the given VM is currently suspended */ + public native int isSuspended(); + /** - * Destroy the VM + * Natively implemented method create the VM. + * @param ramSize size of the RAM that should be allocated (in MB) + * @param migNetSpeed (network bandwith allocated for migrations in MB/s, if you don't know put zero ;)) + * @param dpIntensity (dirty page intensity, a percentage of migNetSpeed [0-100], if you don't know put zero ;)) */ - protected native void destroy(); + private native void create(Host host, String name, int ramSize, int migNetSpeed, int dpIntensity); + + /** - * Natively implemented method starting the VM. - * @param coreAmount + * Set a CPU bound for a given VM. + * @param bound in flops/s */ - private native void start(Host host, String name, int coreAmount); - - /** Returns whether the given VM is currently suspended - */ - public native boolean isSuspended(); - /** Returns whether the given VM is currently running + public native void setBound(double bound); + + /** start the VM */ + public native void start(); + + + /** + * Immediately kills all processes within the given VM. + * + * No extra delay occurs. If you want to simulate this too, you want to use a MSG_process_sleep() */ - public native boolean isRunning(); - /** Add the given process into the VM. - * Afterward, when the VM is migrated or suspended or whatever, the process will have the corresponding handling, too. - */ - public native void bind(Process process); - /** Removes the given process from the given VM, and kill it - * Will raise a ProcessNotFound exception if the process were not bound to that VM - */ - public native void unbind(Process process); - /** Immediately change the host on which all processes are running - * - * No migration cost occurs. If you want to simulate this too, you want to use a - * Task.send() before or after, depending on whether you want to do cold or hot - * migration. + public native void shutdown(); + + /** Invoke native migration routine */ + public native void internalmig(Host destination) throws Exception; // TODO add throws DoubleMigrationException (i.e. when you call migrate on a VM that is already migrating); + + + + /** Change the host on which all processes are running + * (pre-copy is implemented) */ - public native void migrate(Host destination); + public void migrate(Host destination) throws HostFailureException{ + try { + this.internalmig(destination); + } catch (Exception e){ + Msg.info("Migration of VM "+this.getName()+" to "+destination.getName()+" is impossible ("+e.getMessage()+")"); + throw new HostFailureException(); + } + // If the migration correcly returned, then we should change the currentHost value. + this.currentHost = destination; + } + /** Immediately suspend the execution of all processes within the given VM * * No suspension cost occurs. If you want to simulate this too, you want to @@ -75,6 +133,7 @@ public class VM { * of VM suspend to you. */ public native void suspend(); + /** Immediately resumes the execution of all processes within the given VM * * No resume cost occurs. If you want to simulate this too, you want to @@ -82,17 +141,10 @@ public class VM { * of VM resume to you. */ public native void resume(); - /** - * Immediately kills all processes within the given VM. Any memory that they allocated will be leaked. - * No extra delay occurs. If you want to simulate this too, you want to use a MSG_process_sleep() or something - */ - public native void shutdown(); - /** - * Reboot the VM, restarting all the processes in it. - */ - public native void reboot(); - public String getName() { - return name; - } + /** Class initializer (for JNI), don't do it yourself */ + public static native void nativeInit(); + static { + nativeInit(); + } }