X-Git-Url: http://info.iut-bm.univ-fcomte.fr/pub/gitweb/simgrid.git/blobdiff_plain/e0188e2a2598ce57a4d21a3d7eb5f303aecaf0dd..c66deda6497d36e70e2485fff5431151be1713c6:/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 525ea391e8..c762c473ce 100644 --- a/src/bindings/java/org/simgrid/msg/VM.java +++ b/src/bindings/java/org/simgrid/msg/VM.java @@ -1,98 +1,142 @@ -/* - * JNI interface to Cloud interface 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. - */ +/* Java bindings of the s4u::VirtualMachine */ + +/* Copyright (c) 2006-2017. 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 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 { - /** - * This attribute represents a bind between a java task object and - * a native task. Even if this attribute is public you must never - * access to it. It is set automatically during the build of the object. - */ - private long bind = 0; + private Host currentHost; + private int coreAmount = 1; + + /** 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, /*coreAmount*/1, 1024, 0, 0); + } - private int coreAmount; + public VM(Host host, String name, int coreAmount) { + this(host,name, coreAmount, 1024, 0, 0); + } + public VM(Host host, String name, int ramSize, int migNetSpeed, int dpIntensity){ + this(host, name, /*coreAmount*/1, ramSize, migNetSpeed, dpIntensity); + } - private String name; /** - * @brief Create a new empty VM. - * @bug it is expected that in the future, the coreAmount parameter will be used - * to add extra constraints on the execution, but the argument is ignored for now. + * 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 coreAmount) { + public VM(Host host, String name, int coreAmount, int ramSize, int migNetSpeed, int dpIntensity){ + super(); + super.name = name; + this.currentHost = host; this.coreAmount = coreAmount; - this.name = name; - start(host,name,coreAmount); + create(host, name, coreAmount, ramSize, migNetSpeed, dpIntensity); } - protected void finalize() { - destroy(); + + /** Retrieve the list of all existing VMs */ + public static native VM[] all(); + + /** 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 { + nativeFinalize(); } + private 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 */ + public native int isMigrating(); + + /** Returns whether the given VM is currently suspended */ + public native int isSuspended(); + /** - * Destroy the VM + * 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 ;)) */ - protected native void destroy(); + private native void create(Host host, String name, int coreAmount, int ramSize, int migNetSpeed, int dpIntensity); + + /** - * Natively implemented method starting the VM. - * @param coreAmount + * Set a CPU bound for a given VM. + * @param bound in flops/s */ - private native void start(Host host, String name, int coreAmount); - - /** @brief Returns whether the given VM is currently suspended - */ - public native boolean isSuspended(); - /** @brief Returns whether the given VM is currently running + public native void setBound(double bound); + + /** start the VM */ + public native void start(); + + + /** + * 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 boolean isRunning(); - /** @brief Add the given process into the VM. - * Afterward, when the VM is migrated or suspended or whatever, the process will have the corresponding handling, too. - */ - public native void bind(Process process); - /** @brief Removes the given process from the given VM, and kill it - * Will raise a ProcessNotFound exception if the process were not binded to that VM - */ - public native void unbind(Process process); - /** @brief 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. + public native void shutdown(); + + /** Change the host on which all processes are running + * (pre-copy is implemented) */ - public native void migrate(Host destination); - /** @brief Immediately suspend the execution of all processes within the given VM + 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; + } + 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. */ public native void suspend(); - /** @brief Immediately resumes the execution of all processes within the given VM + + /** 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. */ public native void resume(); - /** - * @brief 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 - */ - public native void shutdown(); - /** - * @brief Reboot the VM, restarting all the processes in it. - */ - public native void reboot(); - public String getName() { - return name; - } + /** Class initializer (for JNI), don't do it yourself */ + private static native void nativeInit(); + static { + nativeInit(); + } }