X-Git-Url: http://info.iut-bm.univ-fcomte.fr/pub/gitweb/simgrid.git/blobdiff_plain/2703e1ee2a79e9fc7c86ebb122caa515ecf24d14..a6c64d74cc84ef31accb835f570f990f5c45ecf8:/src/bindings/java/org/simgrid/msg/VM.java diff --git a/src/bindings/java/org/simgrid/msg/VM.java b/src/bindings/java/org/simgrid/msg/VM.java index eb61988e92..867eed8909 100644 --- a/src/bindings/java/org/simgrid/msg/VM.java +++ b/src/bindings/java/org/simgrid/msg/VM.java @@ -1,112 +1,130 @@ -/* - * 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. - */ +/* JNI interface to virtual machine in Simgrid */ + +/* Copyright (c) 2006-2014. 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. */ + package org.simgrid.msg; +import java.util.ArrayList; -import org.simgrid.msg.Host; -import org.simgrid.msg.Process; +public class VM extends Host { + // No need to declare a new bind variable: we use the one inherited from the super class Host -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 - - /* Constructors / destructors */ - /** - * Create a `basic' VM (i.e. 1 core, 1GB of RAM, other values are not taken into account). - */ + private static ArrayList vms= new ArrayList<>(); + private Host currentHost; + + /** Create a `basic' VM (i.e. 1GB of RAM, other values are not taken into account). */ public VM(Host host, String name) { - this(host,name,1,1024*1024*1024, -1, null, -1); + this(host,name,1024, 0, 0); } /** - * Create a `basic' VM (i.e. 1 core, 1GB of RAM, other values are not taken into account). + * Create a VM + * @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 nCore, long ramSize, - long netCap, String diskPath, long diskSize){ + public VM(Host host, String name, int ramSize, int migNetSpeed, int dpIntensity){ super(); - super.name = name; - create(host, name, nCore, ramSize, netCap, diskPath, diskSize); + super.name = name; + this.currentHost = host; + create(host, name, ramSize, migNetSpeed, dpIntensity); + vms.add(this); } - protected void finalize() { - destroy(); + public static VM[] all(){ + VM[] allvms = new VM[vms.size()]; + vms.toArray(allvms); + return allvms; } - - /* JNI / Native code */ - /* get/set property methods are inherited from the Host class. */ - - /** Returns whether the given VM is currently suspended - */ - public native int isCreated(); + public static VM getVMByName(String name){ + for (VM vm : vms){ + if (vm.getName().equals(name)) + return vm; + } + return null; + } - /** Returns whether the given VM is currently running + /** 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(); +/// vms.remove(this); + } + + /* Make sure that the GC also destroys the C object */ + protected void finalize() throws Throwable { + nativeFinalize(); + } + public native void nativeFinalize(); + + /** Returns whether the given VM is currently suspended */ + public native int isCreated(); + + /** 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(); - /** * Natively implemented method create the VM. - * @param nCore, number of core - * @param ramSize, size of the RAM that should be allocated - * @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, long ramSize, - long netCap, String diskPath, long diskSize); - + private native void create(Host host, String name, int ramSize, int migNetSpeed, int dpIntensity); + + /** - * start the VM + * Set a CPU bound for a given VM. + * @param bound in flops/s */ + public native void setBound(double bound); + + /** 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(); - - - /** Immediately change the host on which all processes are running - * - * No migration cost occurs. If you want to simulate this too, you want to use a - * Task.send() before or after, depending on whether you want to do cold or hot - * migration. + + /** native migration routine */ + private native void nativeMigration(Host destination) throws Exception; + + /** Change the host on which all processes are running + * (pre-copy is implemented) */ - public native void migrate(Host 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; + } + /** 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 @@ -114,7 +132,7 @@ public class VM extends Host{ * 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 @@ -122,37 +140,8 @@ public class VM extends Host{ * 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 - */ - protected native void destroy(); - - - - /** - * Class initializer, to initialize various JNI stuff - */ + /** Class initializer (for JNI), don't do it yourself */ public static native void nativeInit(); static { nativeInit();