-/*
- * JNI interface to virtual machine 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.
- */
-package org.simgrid.msg;
+/* Java bindings of the s4u::VirtualMachine */
-import org.simgrid.msg.Host;
-import org.simgrid.msg.Process;
+/* Copyright (c) 2006-2018. The SimGrid Team. All rights reserved. */
-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)
-
- /* Static functions */
- // GetByName is inherited from the super class Host
-
+/* 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. */
- private static VM[] vms=null;
- private Host currentHost;
+package org.simgrid.msg;
- /* Constructors / destructors */
- /**
- * Create a `basic' VM (i.e. 1 core, 1GB of RAM, other values are not taken into account).
- */
+public class VM extends Host {
+ // No need to declare a new bind variable: we use the one inherited from the super class Host
+
+ private Host currentHost;
+ private int coreAmount = 1;
+
+ /**
+ * Create a `basic' VM : 1 core and 1GB of RAM.
+ * @param host Host node
+ * @param name name of the machine
+ */
public VM(Host host, String name) {
- this(host,name,1,1024, -1, null, -1,0 , 0);
+ this(host,name, /*coreAmount*/1, 1024, 0, 0);
}
/**
- * 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)
+ * Create a VM without useless values (for humans)
+ * @param host Host node
+ * @param name name of the machine
+ * @param coreAmount the amount of cores of the VM
+ */
+ public VM(Host host, String name, int coreAmount) {
+ this(host,name, coreAmount, 1024, 0, 0);
+ }
+
+ /**
+ * Create a VM with 1 core
+ * @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 ;))
+ */
+ public VM(Host host, String name, int ramSize, int migNetSpeed, int dpIntensity){
+ this(host, name, /*coreAmount*/1, ramSize, migNetSpeed, dpIntensity);
+ }
+
+ /**
+ * Create a VM
+ * @param host Host node
+ * @param name name of the machine
+ * @param coreAmount the amount of cores of the VM
+ * @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 ;))
*/
-
- 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 coreAmount, int ramSize, int migNetSpeed, int dpIntensity){
super();
- super.name = name;
- this.currentHost = host;
- create(host, name, nCore, ramSize, netCap, diskPath, diskSize, migNetSpeed, dpIntensity);
- VM.addVM(this);
+ super.name = name;
+ this.currentHost = host;
+ this.coreAmount = coreAmount;
+ create(host, name, coreAmount, ramSize, migNetSpeed, dpIntensity);
}
- 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;
- }
- public static VM getVMByName(String name){
- for (int i=0 ; i < vms.length ; i++){
- if (vms[i].getName().equals(name))
- return vms[i];
- }
- return null;
- }
- protected void finalize() {
- destroy();
- }
-
+ /** Retrieve the list of all existing VMs */
+ public static native VM[] all();
- /* JNI / Native code */
+ /** Retrieve a VM from its name */
+ public static native VM getVMByName(String name);
- /* get/set property methods are inherited from the Host class. */
-
- /** Returns whether the given VM is currently suspended
- */
+ /* Make sure that the GC also destroys the C object */
+ protected void finalize() throws Throwable {
+ nativeFinalize();
+ }
+ private native void nativeFinalize();
+
+ /** 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
- */
- public native int isSaving();
-
- /** Returns whether the given VM is currently saved
- */
- public native int isSaved();
- /** Returns whether the given VM is currently restoring its state
- */
- public native boolean isRestoring();
+ /** Returns the amount of virtual CPUs provided */
+ public int getCoreAmount() {
+ return coreAmount;
+ }
/**
* 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 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 ;))
*/
- 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 coreAmount, 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
- */
- public native void internalmig(Host destination);
-
+ /** Shutdown and unref the VM. */
+ public native void destroy();
+
/** Change the host on which all processes are running
* (pre-copy is implemented)
*/
- public void migrate(Host destination){
- this.internalmig(destination);
- this.currentHost = destination;
+ public void migrate(Host destination) throws HostFailureException{
+ try {
+ this.nativeMigration(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;
}
-
+ private native void nativeMigration(Host destination) throws MsgException;
+
/** 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
- * use a \ref File.write() before or after, depending on the exact semantic
- * of VM suspend to you.
+ * No suspension cost occurs. If you want to simulate this too, you want to use a \ref File.write() before or
+ * after, depending on the exact semantic 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
- * use a \ref File.read() before or after, depending on the exact semantic
- * of VM resume to you.
+ * No resume cost occurs. If you want to simulate this too, you want to use a \ref File.read() before or after,
+ * depending on the exact semantic of VM resume to you.
*/
public native void resume();
-
- /** Immediately suspend the execution of all processes within the given VM
- * and save its state on the persistent HDD
- * Not yet implemented (for the moment it behaves like suspend)
- * No suspension cost occurs. If you want to simulate this too, you want to
- * use a \ref File.write() before or after, depending on the exact semantic
- * of VM suspend to you.
- */
- public native void save();
-
- /** Immediately resumes the execution of all processes previously saved
- * within the given VM
- * Not yet implemented (for the moment it behaves like resume)
- *
- * No resume cost occurs. If you want to simulate this too, you want to
- * use a \ref File.read() before or after, depending on the exact semantic
- * of VM resume to you.
- */
- public native void restore();
-
- /**
- * Destroy the VM
- */
- public native void destroy();
-
-
-
- /**
- * Class initializer, to initialize various JNI stuff
- */
- public static native void nativeInit();
+ /** Class initializer (for JNI), don't do it yourself */
+ private static native void nativeInit();
static {
nativeInit();
}
