/* Java bindings of the s4u::VirtualMachine */
-/* Copyright (c) 2006-2017. The SimGrid Team. All rights reserved. */
+/* Copyright (c) 2006-2018. 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. */
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 Host currentHost;
+ private int coreAmount = 1;
- /** Create a `basic' VM (i.e. 1GB of RAM, other values are not taken into account). */
+ /**
+ * 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,1024, 0, 0);
+ this(host,name, /*coreAmount*/1, 1024, 0, 0);
+ }
+
+ /**
+ * 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 ramSize, 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, ramSize, migNetSpeed, dpIntensity);
+ this.currentHost = host;
+ this.coreAmount = coreAmount;
+ create(host, name, coreAmount, ramSize, migNetSpeed, dpIntensity);
}
/** Retrieve the list of all existing VMs */
/** Retrieve a VM from its name */
public static native VM getVMByName(String name);
-
- /** Shutdown and unref the VM.
- *
- * Actually, this strictly equivalent to shutdown().
- * In C and in libvirt, the destroy function also releases the memory associated to the VM,
- * but this is not the way it goes in Java. The VM will only get destroyed by the garbage
- * collector when it is not referenced anymore by your variables. So, to see the VM really
- * destroyed, don't call this function but simply release any ref you have on it.
- */
- public void destroy() {
- shutdown();
- }
/* Make sure that the GC also destroys the C object */
protected void finalize() throws Throwable {
/** Returns whether the given VM is currently suspended */
public native int isSuspended();
+ /** Returns the amount of virtual CPUs provided */
+ public int getCoreAmount() {
+ return coreAmount;
+ }
+
/**
* Natively implemented method create the VM.
* @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 ramSize, int migNetSpeed, int dpIntensity);
-
+ private native void create(Host host, String name, int coreAmount, int ramSize, int migNetSpeed, int dpIntensity);
/**
* Set a CPU bound for a given VM.
/** start the VM */
public native void start();
-
/**
- * Immediately kills all processes within the given VM.
- *
+ * 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();
+ /** Shutdown and unref the VM. */
+ public native void destroy();
+
/** Change the host on which all processes are running
* (pre-copy is implemented)
*/
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;
+ // 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();
