-/*
- * Bindings to the MSG hosts
- *
- * 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.
- *
- */
+/* Bindings to the MSG hosts */
+
+/* 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. */
+
package org.simgrid.msg;
/**
- * A host object represents a location (any possible place) where a process may run.
- * Thus it is represented as a physical resource with computing capabilities, some
- * mailboxes to enable running process to communicate with remote ones, and some private
- * data that can be only accessed by local process. An instance of this class is always
+ * A host object represents a location (any possible place) where a process may run.
+ * Thus it is represented as a physical resource with computing capabilities, some
+ * mailboxes to enable running process to communicate with remote ones, and some private
+ * data that can be only accessed by local process. An instance of this class is always
* bound with the corresponding native host. All the native hosts are automatically created
* during the call of the method Msg.createEnvironment(). This method take as parameter a
* platform file which describes all elements of the platform (host, link, root..).
* You cannot create a host yourself.
*
- * The best way to get an host instance is to call the static method
+ * The best way to get an host instance is to call the static method
* Host.getByName().
*
* For example to get the instance of the host. If your platform
* \verbatim
Host jacquelin;
-try {
+try {
jacquelin = Host.getByName("Jacquelin");
} catch(HostNotFoundException e) {
System.err.println(e.toString());
...
\endverbatim
*
- */
+ */
public class Host {
/**
* This attribute represents a bind between a java host object and
* a native host. Even if this attribute is public you must never
- * access to it. It is set automatically during the call of the
+ * access to it. It is set automatically during the call of the
* static method Host.getByName().
*
* @see Host.getByName().
- */
- private long bind;
- /**
- * Host name
*/
- private String name;
+ private long bind;
+ protected String name;
- /**
- * User data.
- */
+ /** User data. */
private Object data;
- /**
- *
- */
- protected Host() {
+ protected Host() {
this.bind = 0;
this.data = null;
- };
+ }
+
+ @Override
+ public String toString (){
+ return this.name;
+ }
/**
* This static method gets an host instance associated with a native
* @param name The name of the host to get.
*
* @return The host object with the given name.
- * @exception HostNotFoundException if the name of the host is not valid.
- * NativeException if the native version of this method failed.
- */
- public native static Host getByName(String name)
- throws HostNotFoundException, NullPointerException;
- /**
- * This static method returns the count of the installed hosts.
- *
- * @return The count of the installed hosts.
- */
- public native static int getCount();
+ * @exception HostNotFoundException if the name of the host is not valid.
+ */
+ public static native Host getByName(String name) throws HostNotFoundException;
+ /** Counts the installed hosts. */
+ public static native int getCount();
- /**
- * This static method return an instance to the host of the current process.
- *
- * @return The host on which the current process is executed.
- */
- public native static Host currentHost();
+ /** Returns the host of the current process. */
+ public static native Host currentHost();
+
+ /** Returns all hosts of the installed platform. */
+ public static native Host[] all();
/**
- * This static method returns all of the hosts of the installed platform.
+ * This static method sets a mailbox to receive in asynchronous mode.
*
- * @return An array containing all the hosts installed.
+ * All messages sent to this mailbox will be transferred to
+ * the receiver without waiting for the receive call.
+ * The receive call will still be necessary to use the received data.
+ * If there is a need to receive some messages asynchronously, and some not,
+ * two different mailboxes should be used.
*
- */
- public native static Host[] all();
+ * @param mailboxName The name of the mailbox
+ */
+ public static native void setAsyncMailbox(String mailboxName);
- /**
- * This method returns the name of a host.
- * @return The name of the host.
- *
- */
public String getName() {
return name;
}
- /**
- * Sets the data of the host.
- * @param data
- */
+
public void setData(Object data) {
this.data = data;
- }
- /**
- * Gets the data of the host.
- *
- * @return The data object associated with the host.
- */
+ }
+
public Object getData() {
return this.data;
}
-
- /**
- * Checks whether a host has data.
- *
- * @return True if the host has an associated data object.
- */
+ /** Returns true if the host has an associated data object. */
public boolean hasData() {
return null != this.data;
}
- /**
- * This method returns the number of tasks currently running on a host.
- * The external load is not taken in account.
- *
- * @return The number of tasks currently running on a host.
- */
- public native int getLoad();
+ /** Starts the host if it is off */
+ public native void on();
+ /** Stops the host if it is on */
+ public native void off();
/**
- * This method returns the speed of the processor of a host,
+ * This method returns the speed of the processor of a host (in flops),
* regardless of the current load of the machine.
- *
- * @return The speed of the processor of the host in flops.
- *
- */
- public native double getSpeed();
- /**
- * Returns the value of a given host property.
*/
+ public native double getSpeed();
+ public native double getCoreNumber();
+
public native String getProperty(String name);
- /**
- * Change the value of a given host property.
- */
public native void setProperty(String name, String value);
- /** This method tests if a host is available.
- * @return True if the host is available.
- */
- public native boolean isAvail();
-
- /**
- * Class initializer, to initialize various JNI stuff
+ /** Tests if an host is up and running. */
+ public native boolean isOn();
+
+ /** Returns the list of mount point names on an host */
+ public native Storage[] getMountedStorage();
+ /** This methods returns the list of storages (names) attached to an host */
+ public native String[] getAttachedStorage();
+
+ /** After this call, sg_host_get_consumed_energy() will not interrupt your process
+ * (until after the next clock update).
+ */
+ public static native void updateAllEnergyConsumptions();
+ /** Returns the amount of Joules consumed by that host so far
+ *
+ * Please note that since the consumption is lazily updated, it may require a simcall to update it.
+ * The result is that the actor requesting this value will be interrupted,
+ * the value will be updated in kernel mode before returning the control to the requesting actor.
+ */
+ public native double getConsumedEnergy();
+
+ /** Returns the current load of the host, as a ratio = achieved_flops / (core_current_speed * core_amount)
+ *
+ * See simgrid::plugin::HostLoad::get_current_load() for the full documentation.
*/
- public static native void nativeInit();
+ public native double getCurrentLoad();
+ /** Returns the number of flops computed of the host since the beginning of the simulation */
+ public native double getComputedFlops();
+ /** Returns the average load of the host as a ratio since the beginning of the simulation*/
+ public native double getAvgLoad();
+
+ /** Returns the current pstate */
+ public native int getPstate();
+ /** Changes the current pstate */
+ public native void setPstate(int pstate);
+ public native int getPstatesCount();
+ /** Returns the speed of the processor (in flop/s) at the current pstate. See also @ref plugin_energy. */
+ public native double getCurrentPowerPeak();
+ /** Returns the speed of the processor (in flop/s) at a given pstate. See also @ref plugin_energy. */
+ public native double getPowerPeakAt(int pstate);
+
+ /** Returns the current computation load (in flops per second) */
+ public native double getLoad();
+
+ /** Class initializer, to initialize various JNI stuff */
+ private static native void nativeInit();
static {
nativeInit();
}
-}
+}
