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;
26 private int dpIntensity = 0 ;
28 /* Constructors / destructors */
30 * Create a `basic' VM (i.e. 1 core, 1GB of RAM, other values are not taken into account).
32 public VM(Host host, String name) {
33 this(host,name,1,1024, -1, null, -1,0 , 0);
38 * @param host, Host node
39 * @param name, name of the machine
40 * @param nCore, number of core
41 * @param ramSize, size of the RAM that should be allocated (in MBytes)
42 * @param netCap (not used for the moment)
43 * @param diskPath (not used for the moment)
44 * @param diskSize (not used for the moment)
45 * @param migNetSpeed (network bandwith allocated for migrations in MB/s, if you don't know put zero ;))
46 * @param dpIntensity (dirty page percentage according to migNetSpeed, [0-100], if you don't know put zero ;))
49 public VM(Host host, String name, int nCore, int ramSize,
50 int netCap, String diskPath, int diskSize, int migNetSpeed, int dpIntensity){
53 this.currentHost = host;
54 this.dpIntensity = dpIntensity;
55 create(host, name, nCore, ramSize, netCap, diskPath, diskSize, migNetSpeed, dpIntensity);
59 private static void addVM(VM vm){
65 vmsN = new VM[vms.length+1];
67 for (i=0; i<vmsN.length-1 ; i ++){
73 public static VM[] all(){
76 public static VM getVMByName(String name){
77 for (int i=0 ; i < vms.length ; i++){
78 if (vms[i].getName().equals(name))
83 protected void finalize() {
88 /* JNI / Native code */
89 /* get/set property methods are inherited from the Host class. */
91 /** Returns whether the given VM is currently suspended
93 public native int isCreated();
95 /** Returns whether the given VM is currently running
97 public native int isRunning();
99 /** Returns whether the given VM is currently running
101 public native int isMigrating();
103 /** Returns whether the given VM is currently suspended
105 public native int isSuspended();
107 /** Returns whether the given VM is currently saving
109 public native int isSaving();
111 /** Returns whether the given VM is currently saved
113 public native int isSaved();
115 /** Returns whether the given VM is currently restoring its state
117 public native boolean isRestoring();
120 * Natively implemented method create the VM.
121 * @param nCore, number of core
122 * @param ramSize, size of the RAM that should be allocated (in MB)
123 * @param netCap (not used for the moment)
124 * @param diskPath (not used for the moment)
125 * @param diskSize (not used for the moment)
126 * @param migNetSpeed (network bandwith allocated for migrations in MB/s, if you don't know put zero ;))
127 * @param dpIntensity (dirty page intensity, a percentage of migNetSpeed [0-100], if you don't know put zero ;))
129 private native void create(Host host, String name, int nCore, int ramSize,
130 int netCap, String diskPath, int diskSize, int migNetSpeed, int dpIntensity);
134 * Bound the VM to a certain % of its vcpu capability (e.g. 75% of vm.getSpeed())
135 * @param load, percentage (between [0,100]
137 public native void setBound(int load);
142 public native void start();
146 * Immediately kills all processes within the given VM. Any memory that they allocated will be leaked.
147 * No extra delay occurs. If you want to simulate this too, you want to use a MSG_process_sleep() or something
149 public native void shutdown();
152 * Invoke native migration routine
154 public native void internalmig(Host destination);
157 /** Change the host on which all processes are running
158 * (pre-copy is implemented)
160 public void migrate(Host destination){
161 Msg.info("Start migration of VM "+this.getName()+" to node "+destination.getName());
162 Msg.info(" dpIntensity:"+this.dpIntensity);
164 this.internalmig(destination);
165 Msg.info("End of migration of VM "+this.getName()+" to node "+destination.getName());
168 /** Immediately suspend the execution of all processes within the given VM
170 * No suspension cost occurs. If you want to simulate this too, you want to
171 * use a \ref File.write() before or after, depending on the exact semantic
172 * of VM suspend to you.
174 public native void suspend();
176 /** Immediately resumes the execution of all processes within the given VM
178 * No resume cost occurs. If you want to simulate this too, you want to
179 * use a \ref File.read() before or after, depending on the exact semantic
180 * of VM resume to you.
182 public native void resume();
184 /** Immediately suspend the execution of all processes within the given VM
185 * and save its state on the persistent HDD
186 * Not yet implemented (for the moment it behaves like suspend)
187 * No suspension cost occurs. If you want to simulate this too, you want to
188 * use a \ref File.write() before or after, depending on the exact semantic
189 * of VM suspend to you.
191 public native void save();
193 /** Immediately resumes the execution of all processes previously saved
194 * within the given VM
195 * Not yet implemented (for the moment it behaves like resume)
197 * No resume cost occurs. If you want to simulate this too, you want to
198 * use a \ref File.read() before or after, depending on the exact semantic
199 * of VM resume to you.
201 public native void restore();
207 public native void destroy();
212 * Class initializer, to initialize various JNI stuff
214 public static native void nativeInit();