2 * JNI interface to virtual machine in Simgrid
4 * Copyright 2006-2012 The SimGrid Team.
7 * This program is free software; you can redistribute
8 * it and/or modify it under the terms of the license
9 * (GNU LGPL) which comes with this package.
11 package org.simgrid.msg;
13 import org.simgrid.msg.Host;
14 import org.simgrid.msg.Process;
16 public class VM extends Host{
17 // Please note that we are not declaring a new bind variable
18 //(the bind variable has been inherited from the super class Host)
20 /* Static functions */
21 // GetByName is inherited from the super class Host
24 private static VM[] vms=null;
25 private Host currentHost;
27 /* Constructors / destructors */
29 * Create a `basic' VM (i.e. 1 core, 1GB of RAM, other values are not taken into account).
31 public VM(Host host, String name) {
32 this(host,name,1,1024, -1, null, -1,0 , 0);
37 * @param host, Host node
38 * @param name, name of the machine
39 * @param nCore, number of core
40 * @param ramSize, size of the RAM that should be allocated (in MBytes)
41 * @param netCap (not used for the moment)
42 * @param diskPath (not used for the moment)
43 * @param diskSize (not used for the moment)
44 * @param migNetSpeed (network bandwith allocated for migrations in MB/s, if you don't know put zero ;))
45 * @param dpIntensity (dirty page percentage according to migNetSpeed, [0-100], if you don't know put zero ;))
48 public VM(Host host, String name, int nCore, int ramSize,
49 int netCap, String diskPath, int diskSize, int migNetSpeed, int dpIntensity){
52 this.currentHost = host;
53 create(host, name, nCore, ramSize, netCap, diskPath, diskSize, migNetSpeed, dpIntensity);
57 private static void addVM(VM vm){
63 vmsN = new VM[vms.length+1];
65 for (i=0; i<vmsN.length-1 ; i ++){
71 public static VM[] all(){
74 public static VM getVMByName(String name){
75 for (int i=0 ; i < vms.length ; i++){
76 if (vms[i].getName().equals(name))
81 protected void finalize() {
86 /* JNI / Native code */
88 /* get/set property methods are inherited from the Host class. */
90 /** Returns whether the given VM is currently suspended
92 public native int isCreated();
94 /** Returns whether the given VM is currently running
96 public native int isRunning();
98 /** Returns whether the given VM is currently running
100 public native int isMigrating();
102 /** Returns whether the given VM is currently suspended
104 public native int isSuspended();
106 /** Returns whether the given VM is currently saving
108 public native int isSaving();
110 /** Returns whether the given VM is currently saved
112 public native int isSaved();
114 /** Returns whether the given VM is currently restoring its state
116 public native boolean isRestoring();
119 * Natively implemented method create the VM.
120 * @param nCore, number of core
121 * @param ramSize, size of the RAM that should be allocated (in MB)
122 * @param netCap (not used for the moment)
123 * @param diskPath (not used for the moment)
124 * @param diskSize (not used for the moment)
125 * @param migNetSpeed (network bandwith allocated for migrations in MB/s, if you don't know put zero ;))
126 * @param dpIntensity (dirty page intensity, a percentage of migNetSpeed [0-100], if you don't know put zero ;))
128 private native void create(Host host, String name, int nCore, int ramSize,
129 int netCap, String diskPath, int diskSize, int migNetSpeed, int dpIntensity);
133 * Bound the VM to a certain % of its vcpu capability (e.g. 75% of vm.getSpeed())
134 * @param load, percentage (between [0,100]
136 public native void setBound(int load);
141 public native void start();
145 * Immediately kills all processes within the given VM. Any memory that they allocated will be leaked.
146 * No extra delay occurs. If you want to simulate this too, you want to use a MSG_process_sleep() or something
148 public native void shutdown();
151 * Invoke native migration routine
153 public native void internalmig(Host destination);
156 /** Change the host on which all processes are running
157 * (pre-copy is implemented)
159 public void migrate(Host destination){
160 this.internalmig(destination);
161 this.currentHost = destination;
164 /** Immediately suspend the execution of all processes within the given VM
166 * No suspension cost occurs. If you want to simulate this too, you want to
167 * use a \ref File.write() before or after, depending on the exact semantic
168 * of VM suspend to you.
170 public native void suspend();
172 /** Immediately resumes the execution of all processes within the given VM
174 * No resume cost occurs. If you want to simulate this too, you want to
175 * use a \ref File.read() before or after, depending on the exact semantic
176 * of VM resume to you.
178 public native void resume();
180 /** Immediately suspend the execution of all processes within the given VM
181 * and save its state on the persistent HDD
182 * Not yet implemented (for the moment it behaves like suspend)
183 * No suspension cost occurs. If you want to simulate this too, you want to
184 * use a \ref File.write() before or after, depending on the exact semantic
185 * of VM suspend to you.
187 public native void save();
189 /** Immediately resumes the execution of all processes previously saved
190 * within the given VM
191 * Not yet implemented (for the moment it behaves like resume)
193 * No resume cost occurs. If you want to simulate this too, you want to
194 * use a \ref File.read() before or after, depending on the exact semantic
195 * of VM resume to you.
197 public native void restore();
203 public native void destroy();
208 * Class initializer, to initialize various JNI stuff
210 public static native void nativeInit();