gridsim
Class PE

Object
  PE

public class PE
extends Object

GridSim PE (Processing Element) class represents CPU unit, defined in terms of Millions Instructions Per Second (MIPS) rating.
ASSUMPTION: All PEs under the same Machine have the same MIPS rating.

Since:

GridSim Toolkit 1.0

Author:

Manzur Murshed and Rajkumar Buyya

Invariant:

$none

Field Summary

static boolean	BUSY Denotes PE is allocated and hence busy in processing Gridlet
static boolean	FAILED Denotes PE is failed and hence it can't process any Gridlet at this moment.
static boolean	FREE Denotes PE is FREE for allocation

Constructor Summary

PE(int id, int MIPSRating)
Allocates a new PE object

Method Summary

static int	getByteSize() Gets the byte size of this class
int	getID() Gets the PE ID
int	getMIPSRating() Gets the MIPS Rating of this PE
boolean	getStatus() Gets the status of this PE
void	setMIPSRating(int rating) Sets the MIPS Rating of this PE
void	setStatus(boolean status) Sets PE status to either PE.FREE or PE.BUSY
void	setStatusBusy() Sets PE status to busy, meaning it is already executing Gridlets.
void	setStatusFailed() Sets this PE to FAILED.
void	setStatusFree() Sets PE status to free, meaning it is available for processing.

Methods inherited from class Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

FREE

public static final boolean FREE

Denotes PE is FREE for allocation

See Also:

Constant Field Values

BUSY

public static final boolean BUSY

Denotes PE is allocated and hence busy in processing Gridlet

See Also:

Constant Field Values

FAILED

public static final boolean FAILED

Denotes PE is failed and hence it can't process any Gridlet at this moment. This PE is failed because it belongs to a machine which is also failed.

See Also:

Constant Field Values

Constructor Detail

PE

public PE(int id,
          int MIPSRating)

Allocates a new PE object

Parameters:

id - the PE ID

MIPSRating - the capability of the PE. All PEs under the same Machine have same MIPS rating.

Pre Condition:

id >= 0, MIPSRating >= 0

Post Condition:

$none

Method Detail

getID

public int getID()

Gets the PE ID

Returns:

the PE ID

Pre Condition:

$none

Post Condition:

$result >= 0

setMIPSRating

public void setMIPSRating(int rating)

Sets the MIPS Rating of this PE

Parameters:

rating - the capability of the PE

Pre Condition:

rating >= 0

Post Condition:

$none

getMIPSRating

public int getMIPSRating()

Gets the MIPS Rating of this PE

Returns:

the MIPS Rating

Pre Condition:

$none

Post Condition:

$result >= 0

getStatus

public boolean getStatus()

Gets the status of this PE

Returns:

the status of this PE

Pre Condition:

$none

Post Condition:

$none

setStatusFree

public void setStatusFree()

Sets PE status to free, meaning it is available for processing. This should be used by SPACE shared resources only.

Pre Condition:

$none

Post Condition:

$none

setStatusBusy

public void setStatusBusy()

Sets PE status to busy, meaning it is already executing Gridlets. This should be used by SPACE shared resources only.

Pre Condition:

$none

Post Condition:

$none

setStatus

public void setStatus(boolean status)

Sets PE status to either PE.FREE or PE.BUSY

Parameters:

status - PE status, true if it is FREE, false if BUSY.

Pre Condition:

$none

Post Condition:

$none

getByteSize

public static int getByteSize()

Gets the byte size of this class

Returns:

the byte size

Pre Condition:

$none

Post Condition:

$result > 0

setStatusFailed

public void setStatusFailed()

Sets this PE to FAILED.

Pre Condition:

$none

Post Condition:

$none