/* JNI interface to virtual machine in Simgrid */
-/* Copyright (c) 2006-2014. The SimGrid Team.
- * All rights reserved. */
+/* 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;
-
-public class VM extends Host{
- // Please note that we are not declaring a new bind variable
- //(the bind variable has been inherited from the super class Host)
+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 */
- // GetByName is inherited from the super class Host
-
- private static VM[] vms=null;
+ private static ArrayList<VM> vms= new ArrayList<>();
private Host currentHost;
- /* Constructors / destructors */
- /**
- * Create a `basic' VM (i.e. 1 core, 1GB of RAM, other values are not taken into account).
- */
+ /** 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,1,1024, -1, null, -1,0 , 0);
+ this(host,name,1024, 0, 0);
}
/**
- * Create a VM
- * @param host Host node
+ * Create a VM
+ * @param host Host node
* @param name name of the machine
- * @param nCore number of core
* @param ramSize size of the RAM that should be allocated (in MBytes)
- * @param netCap (not used for the moment)
- * @param diskPath (not used for the moment)
- * @param diskSize (not used for the moment)
* @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 ;))
*/
- public VM(Host host, String name, int nCore, int ramSize,
- int netCap, String diskPath, int diskSize, int migNetSpeed, int dpIntensity){
+ public VM(Host host, String name, int ramSize, int migNetSpeed, int dpIntensity){
super();
- super.name = name;
+ super.name = name;
this.currentHost = host;
- create(host, name, nCore, ramSize, netCap, diskPath, diskSize, migNetSpeed, dpIntensity);
- VM.addVM(this);
+ create(host, name, ramSize, migNetSpeed, dpIntensity);
+ vms.add(this);
}
- private static void addVM(VM vm){
- VM[] vmsN=null;
- int i=0;
- if(VM.vms == null)
- vmsN = new VM[1];
- else
- vmsN = new VM[vms.length+1];
-
- for (i=0; i<vmsN.length-1 ; i ++){
- vmsN[i]=vms[i];
- }
- vmsN[i]=vm;
- vms=vmsN;
- }
public static VM[] all(){
- return vms;
+ VM[] allvms = new VM[vms.size()];
+ vms.toArray(allvms);
+ return allvms;
}
+
public static VM getVMByName(String name){
- for (int i=0 ; i < vms.length ; i++){
- if (vms[i].getName().equals(name))
- return vms[i];
+ for (VM vm : vms){
+ if (vm.getName().equals(name))
+ return vm;
}
return null;
}
- protected void finalize() {
- destroy();
+
+ public void destroy() {
+ nativeFinalize();
}
+ private native void nativeFinalize();
/* JNI / Native code */
- /* get/set property methods are inherited from the Host class. */
-
- /** Returns whether the given VM is currently suspended
- */
+ /** Returns whether the given VM is currently suspended */
public native int isCreated();
- /** Returns whether the given VM is currently running
- */
+ /** Returns whether the given VM is currently running */
public native int isRunning();
- /** Returns whether the given VM is currently running
- */
+ /** Returns whether the given VM is currently running */
public native int isMigrating();
- /** Returns whether the given VM is currently suspended
- */
+ /** Returns whether the given VM is currently suspended */
public native int isSuspended();
- /** Returns whether the given VM is currently saving
- */
+ /** Returns whether the given VM is currently saving */
public native int isSaving();
- /** Returns whether the given VM is currently saved
- */
+ /** Returns whether the given VM is currently saved */
public native int isSaved();
- /** Returns whether the given VM is currently restoring its state
- */
+ /** Returns whether the given VM is currently restoring its state */
public native boolean isRestoring();
/**
* Natively implemented method create the VM.
- * @param nCore number of core
* @param ramSize size of the RAM that should be allocated (in MB)
- * @param netCap (not used for the moment)
- * @param diskPath (not used for the moment)
- * @param diskSize (not used for the moment)
* @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 ;))
*/
- private native void create(Host host, String name, int nCore, int ramSize,
- int netCap, String diskPath, int diskSize, int migNetSpeed, int dpIntensity);
+ private native void create(Host host, String name, int ramSize, int migNetSpeed, int dpIntensity);
/**
- * Bound the VM to a certain % of its vcpu capability (e.g. 75% of vm.getSpeed())
- * @param load percentage (between [0,100]
+ * Set a CPU bound for a given VM.
+ * @param bound in flops/s
*/
- public native void setBound(int load);
+ public native void setBound(double bound);
- /**
- * start the VM
- */
+ /** start the VM */
public native void start();
/**
- * 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
+ * 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 void shutdown();
- /**
- * Invoke native migration routine
- */
+ /** 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);
try {
this.internalmig(destination);
} catch (Exception e){
- Msg.info("an exception occurs during the migration of VM "+this.getName());
- throw new HostFailureException();
+ 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;
*/
public native void restore();
-
- /**
- * Destroy the VM
- */
- public native void destroy();
-
-
-
- /**
- * Class initializer, to initialize various JNI stuff
- */
+ /** Class initializer (for JNI), don't do it yourself */
public static native void nativeInit();
static {
nativeInit();