Class MPI

Method Details

• Init

  public static String[] Init(String[] args) throws MPIException

  Initialize MPI.

  Java binding of the MPI operation MPI_INIT.

  Parameters:

  args - arguments to the main method.

  Returns:

  arguments

  Throws:

  MPIException - Signals that an MPI exception of some sort has occurred.

• InitThread

  public static int InitThread(String[] args, int required) throws MPIException

  Initialize MPI with threads.

  Java binding of the MPI operation MPI_INIT_THREAD.

  Parameters:

  args - arguments to the main method.

  required - desired level of thread support

  Returns:

  provided level of thread support

  Throws:

  MPIException - Signals that an MPI exception of some sort has occurred.

• queryThread

  public static int queryThread() throws MPIException

  Java binding of the MPI operation MPI_QUERY_THREAD.

  Returns:

  provided level of thread support

  Throws:

  MPIException - Signals that an MPI exception of some sort has occurred.

• isThreadMain

  public static boolean isThreadMain() throws MPIException

  Java binding of the MPI operation MPI_IS_THREAD_MAIN.

  Returns:

  true if it is the main thread

  Throws:

  MPIException - Signals that an MPI exception of some sort has occurred.

• Finalize

  public static void Finalize() throws MPIException

  Finalize MPI.

  Java binding of the MPI operation MPI_FINALIZE.

  Throws:

  MPIException - Signals that an MPI exception of some sort has occurred.

• wtime

  public static double wtime() throws MPIException

  Returns an elapsed time on the calling processor.

  Java binding of the MPI operation MPI_WTIME.

  Returns:

  time in seconds since an arbitrary time in the past.

  Throws:

  MPIException - Signals that an MPI exception of some sort has occurred.

• wtick

  public static double wtick() throws MPIException

  Returns resolution of timer.

  Java binding of the MPI operation MPI_WTICK.

  Returns:

  resolution of wtime in seconds.

  Throws:

  MPIException - Signals that an MPI exception of some sort has occurred.

• getVersion

  public static Version getVersion()

  Returns a version object representing the version of MPI being used.

  Java binding of the MPI operation MPI_GET_VERSION.

  Returns:

  A version object representing the version and subversion of MPI being used.

• getLibVersion

  public static String getLibVersion()

  Returns the version of the MPI Library

  Java binding of the MPI operation MPI_GET_LIBRARY_VERSION.

  Returns:

  A string representation of the MPI Library

• getProcessorName

  public static String getProcessorName() throws MPIException

  Returns the name of the processor on which it is called.

  Java binding of the MPI operation MPI_GET_PROCESSOR_NAME.

  Returns:

  A unique specifier for the actual node.

  Throws:

  MPIException - Signals that an MPI exception of some sort has occurred.

• isInitialized

  public static boolean isInitialized() throws MPIException

  Test if MPI has been initialized.

  Java binding of the MPI operation MPI_INITIALIZED.

  Returns:

  true if Init has been called, false otherwise.

  Throws:

  MPIException - Signals that an MPI exception of some sort has occurred.

• isFinalized

  public static boolean isFinalized() throws MPIException

  Test if MPI has been finalized.

  Java binding of the MPI operation MPI_FINALIZED.

  Returns:

  true if Finalize has been called, false otherwise.

  Throws:

  MPIException - Signals that an MPI exception of some sort has occurred.

• attachBuffer

  public static void attachBuffer(byte[] buffer) throws MPIException

  Attaches a user-provided buffer for sending.

  Java binding of the MPI operation MPI_BUFFER_ATTACH.

  Parameters:

  buffer - initial buffer

  Throws:

  MPIException - Signals that an MPI exception of some sort has occurred.

• detachBuffer

  public static byte[] detachBuffer() throws MPIException

  Removes an existing buffer (for use in sending).

  Java binding of the MPI operation MPI_BUFFER_DETACH.

  Returns:

  initial buffer

  Throws:

  MPIException - Signals that an MPI exception of some sort has occurred.

• pControl

  public static void pControl(int level, Object obj)

  Controls profiling.

  This method is not implemented.

  Java binding of the MPI operation MPI_PCONTROL.

  Parameters:

  level - Profiling level.

  obj - Profiling information.

• check

  protected static void check() throws MPIException

  Check if MPI has been initialized and hasn't been finalized.

  Throws:

  MPIException - Signals that an MPI exception of some sort has occurred.

• attrSet

  protected static byte[] attrSet(Object value) throws MPIException

  Throws:

  MPIException

• attrGet

  protected static Object attrGet(byte[] value) throws MPIException

  Throws:

  MPIException

• newByteBuffer

  public static ByteBuffer newByteBuffer(int capacity)

  Allocates a new direct byte buffer.

  Parameters:

  capacity - The new buffer's capacity, in bytes

  Returns:

  The new byte buffer

• newCharBuffer

  public static CharBuffer newCharBuffer(int capacity)

  Allocates a new direct char buffer.

  Parameters:

  capacity - The new buffer's capacity, in chars

  Returns:

  The new char buffer

• newShortBuffer

  public static ShortBuffer newShortBuffer(int capacity)

  Allocates a new direct short buffer.

  Parameters:

  capacity - The new buffer's capacity, in shorts

  Returns:

  The new short buffer

• newIntBuffer

  public static IntBuffer newIntBuffer(int capacity)

  Allocates a new direct int buffer.

  Parameters:

  capacity - The new buffer's capacity, in ints

  Returns:

  The new int buffer

• newLongBuffer

  public static LongBuffer newLongBuffer(int capacity)

  Allocates a new direct long buffer.

  Parameters:

  capacity - The new buffer's capacity, in longs

  Returns:

  The new long buffer

• newFloatBuffer

  public static FloatBuffer newFloatBuffer(int capacity)

  Allocates a new direct float buffer.

  Parameters:

  capacity - The new buffer's capacity, in floats

  Returns:

  The new float buffer

• newDoubleBuffer

  public static DoubleBuffer newDoubleBuffer(int capacity)

  Allocates a new direct double buffer.

  Parameters:

  capacity - The new buffer's capacity, in doubles

  Returns:

  The new double buffer

• assertDirectBuffer

  protected static void assertDirectBuffer(Buffer buf)

  Asserts that a buffer is direct.

  Parameters:

  buf - buffer

• assertDirectBuffer

  protected static void assertDirectBuffer(Buffer sendbuf, Buffer recvbuf)

  Asserts that buffers are direct.

  Parameters:

  sendbuf - The send buffer

  recvbuf - The receive buffer

• isDirectBuffer

  protected static boolean isDirectBuffer(Object obj)

  Checks if an object is a direct buffer.

  Parameters:

  obj - object

  Returns:

  true if the object is a direct buffer

• isHeapBuffer

  protected static boolean isHeapBuffer(Object obj)

  Checks if an object is a heap buffer.

  Parameters:

  obj - object

  Returns:

  true if the object is a heap buffer

• slice

  public static ByteBuffer slice(ByteBuffer buf, int offset)

  Creates a new buffer whose content is a shared subsequence of a buffer.

  The content of the new buffer will start at the specified offset.

  Parameters:

  buf - buffer

  offset - offset

  Returns:

  the new buffer.

• slice

  public static CharBuffer slice(CharBuffer buf, int offset)

  Creates a new buffer whose content is a shared subsequence of a buffer.

  The content of the new buffer will start at the specified offset.

  Parameters:

  buf - buffer

  offset - offset

  Returns:

  the new buffer.

• slice

  public static ShortBuffer slice(ShortBuffer buf, int offset)

  Creates a new buffer whose content is a shared subsequence of a buffer.

  The content of the new buffer will start at the specified offset.

  Parameters:

  buf - buffer

  offset - offset

  Returns:

  the new buffer.

• slice

  public static IntBuffer slice(IntBuffer buf, int offset)

  Creates a new buffer whose content is a shared subsequence of a buffer.

  The content of the new buffer will start at the specified offset.

  Parameters:

  buf - buffer

  offset - offset

  Returns:

  the new buffer.

• slice

  public static LongBuffer slice(LongBuffer buf, int offset)

  Creates a new buffer whose content is a shared subsequence of a buffer.

  The content of the new buffer will start at the specified offset.

  Parameters:

  buf - buffer

  offset - offset

  Returns:

  the new buffer.

• slice

  public static FloatBuffer slice(FloatBuffer buf, int offset)

  Creates a new buffer whose content is a shared subsequence of a buffer.

  The content of the new buffer will start at the specified offset.

  Parameters:

  buf - buffer

  offset - offset

  Returns:

  the new buffer.

• slice

  public static DoubleBuffer slice(DoubleBuffer buf, int offset)

  Creates a new buffer whose content is a shared subsequence of a buffer.

  The content of the new buffer will start at the specified offset.

  Parameters:

  buf - buffer

  offset - offset

  Returns:

  the new buffer.

• slice

  public static ByteBuffer slice(byte[] buf, int offset)

  Creates a new buffer whose content is a shared subsequence of a buffer.

  The content of the new buffer will start at the specified offset.

  Parameters:

  buf - buffer

  offset - offset

  Returns:

  the new buffer.

• slice

  public static CharBuffer slice(char[] buf, int offset)

  Creates a new buffer whose content is a shared subsequence of a buffer.

  The content of the new buffer will start at the specified offset.

  Parameters:

  buf - buffer

  offset - offset

  Returns:

  the new buffer.

• slice

  public static ShortBuffer slice(short[] buf, int offset)

  Creates a new buffer whose content is a shared subsequence of a buffer.

  The content of the new buffer will start at the specified offset.

  Parameters:

  buf - buffer

  offset - offset

  Returns:

  the new buffer.

• slice

  public static IntBuffer slice(int[] buf, int offset)

  Creates a new buffer whose content is a shared subsequence of a buffer.

  The content of the new buffer will start at the specified offset.

  Parameters:

  buf - buffer

  offset - offset

  Returns:

  the new buffer.

• slice

  public static LongBuffer slice(long[] buf, int offset)

  Creates a new buffer whose content is a shared subsequence of a buffer.

  The content of the new buffer will start at the specified offset.

  Parameters:

  buf - buffer

  offset - offset

  Returns:

  the new buffer.

• slice

  public static FloatBuffer slice(float[] buf, int offset)

  Creates a new buffer whose content is a shared subsequence of a buffer.

  The content of the new buffer will start at the specified offset.

  Parameters:

  buf - buffer

  offset - offset

  Returns:

  the new buffer.

• slice

  public static DoubleBuffer slice(double[] buf, int offset)

  Creates a new buffer whose content is a shared subsequence of a buffer.

  The content of the new buffer will start at the specified offset.

  Parameters:

  buf - buffer

  offset - offset

  Returns:

  the new buffer.