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 */
87 /* get/set property methods are inherited from the Host class. */
89 /** Returns whether the given VM is currently suspended
91 public native int isCreated();
93 /** Returns whether the given VM is currently running
95 public native int isRunning();
97 /** Returns whether the given VM is currently running
99 public native int isMigrating();
101 /** Returns whether the given VM is currently suspended
103 public native int isSuspended();
105 /** Returns whether the given VM is currently saving
107 public native int isSaving();
109 /** Returns whether the given VM is currently saved
111 public native int isSaved();
113 /** Returns whether the given VM is currently restoring its state
115 public native boolean isRestoring();
118 * Natively implemented method create the VM.
119 * @param nCore, number of core
120 * @param ramSize, size of the RAM that should be allocated (in MB)
121 * @param netCap (not used for the moment)
122 * @param diskPath (not used for the moment)
123 * @param diskSize (not used for the moment)
124 * @param migNetSpeed (network bandwith allocated for migrations in MB/s, if you don't know put zero ;))
125 * @param dpIntensity (dirty page intensity, a percentage of migNetSpeed [0-100], if you don't know put zero ;))
127 private native void create(Host host, String name, int nCore, int ramSize,
128 int netCap, String diskPath, int diskSize, int migNetSpeed, int dpIntensity);
132 * Bound the VM to a certain % of its vcpu capability (e.g. 75% of vm.getSpeed())
133 * @param load, percentage (between [0,100]
135 public native void setBound(int load);
140 public native void start();
144 * Immediately kills all processes within the given VM. Any memory that they allocated will be leaked.
145 * No extra delay occurs. If you want to simulate this too, you want to use a MSG_process_sleep() or something
147 public native void shutdown();
150 * Invoke native migration routine
152 public native void internalmig(Host destination);
155 /** Change the host on which all processes are running
156 * (pre-copy is implemented)
158 public void migrate(Host destination){
159 this.internalmig(destination);
162 /** Immediately suspend the execution of all processes within the given VM
164 * No suspension cost occurs. If you want to simulate this too, you want to
165 * use a \ref File.write() before or after, depending on the exact semantic
166 * of VM suspend to you.
168 public native void suspend();
170 /** Immediately resumes the execution of all processes within the given VM
172 * No resume cost occurs. If you want to simulate this too, you want to
173 * use a \ref File.read() before or after, depending on the exact semantic
174 * of VM resume to you.
176 public native void resume();
178 /** Immediately suspend the execution of all processes within the given VM
179 * and save its state on the persistent HDD
180 * Not yet implemented (for the moment it behaves like suspend)
181 * No suspension cost occurs. If you want to simulate this too, you want to
182 * use a \ref File.write() before or after, depending on the exact semantic
183 * of VM suspend to you.
185 public native void save();
187 /** Immediately resumes the execution of all processes previously saved
188 * within the given VM
189 * Not yet implemented (for the moment it behaves like resume)
191 * No resume cost occurs. If you want to simulate this too, you want to
192 * use a \ref File.read() before or after, depending on the exact semantic
193 * of VM resume to you.
195 public native void restore();
201 public native void destroy();
206 * Class initializer, to initialize various JNI stuff
208 public static native void nativeInit();