FIT5174 Parallel & Distributed Systems Dr. Ronald Pose Lecture 5 - 20131 FIT5174 Distributed & Parallel Systems Lecture 5 Message Passing and MPI.

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Presentation transcript:

FIT5174 Parallel & Distributed Systems Dr. Ronald Pose Lecture FIT5174 Distributed & Parallel Systems Lecture 5 Message Passing and MPI

FIT5174 Parallel & Distributed Systems Dr. Ronald Pose Lecture Acknowledgement These slides are based on slides and material by: C Evangelinos, Scott Baden, Zhiliang Xu

FIT5174 Parallel & Distributed Systems Dr. Ronald Pose Lecture Shared Memory Approach

FIT5174 Parallel & Distributed Systems Dr. Ronald Pose Lecture Message Passing Model

FIT5174 Parallel & Distributed Systems Dr. Ronald Pose Lecture Distributed Computing using Message Passing

FIT5174 Parallel & Distributed Systems Dr. Ronald Pose Lecture Single Program / Multiple Program - Multiple Data

FIT5174 Parallel & Distributed Systems Dr. Ronald Pose Lecture Programming with message passing

FIT5174 Parallel & Distributed Systems Dr. Ronald Pose Lecture Message passing concept

FIT5174 Parallel & Distributed Systems Dr. Ronald Pose Lecture Send and Receive concept

FIT5174 Parallel & Distributed Systems Dr. Ronald Pose Lecture Message completion

FIT5174 Parallel & Distributed Systems Dr. Ronald Pose Lecture Buffering concept

FIT5174 Parallel & Distributed Systems Dr. Ronald Pose Lecture Causality concept

FIT5174 Parallel & Distributed Systems Dr. Ronald Pose Lecture Asynchronous versus Synchronous

FIT5174 Parallel & Distributed Systems Dr. Ronald Pose Lecture Overlapping operations

FIT5174 Parallel & Distributed Systems Dr. Ronald Pose Lecture What is MPI?

FIT5174 Parallel & Distributed Systems Dr. Ronald Pose Lecture MPI websites

FIT5174 Parallel & Distributed Systems Dr. Ronald Pose Lecture MPI: Message Passing Interface

FIT5174 Parallel & Distributed Systems Dr. Ronald Pose Lecture MPI history

FIT5174 Parallel & Distributed Systems Dr. Ronald Pose Lecture MPI in context

FIT5174 Parallel & Distributed Systems Dr. Ronald Pose Lecture MPI fundamentals

FIT5174 Parallel & Distributed Systems Dr. Ronald Pose Lecture Minimal MPI subset

FIT5174 Parallel & Distributed Systems Dr. Ronald Pose Lecture Initializing MPI

FIT5174 Parallel & Distributed Systems Dr. Ronald Pose Lecture Getting started with MPI

FIT5174 Parallel & Distributed Systems Dr. Ronald Pose Lecture MPI program details

FIT5174 Parallel & Distributed Systems Dr. Ronald Pose Lecture MPI program more details

FIT5174 Parallel & Distributed Systems Dr. Ronald Pose Lecture Simple MPI C Program

FIT5174 Parallel & Distributed Systems Dr. Ronald Pose Lecture MPI Communicators and handles

FIT5174 Parallel & Distributed Systems Dr. Ronald Pose Lecture MPI Communicator size

FIT5174 Parallel & Distributed Systems Dr. Ronald Pose Lecture MPI Communicator size

FIT5174 Parallel & Distributed Systems Dr. Ronald Pose Lecture MPI Process rank

FIT5174 Parallel & Distributed Systems Dr. Ronald Pose Lecture MPI Process rank

FIT5174 Parallel & Distributed Systems Dr. Ronald Pose Lecture MPI exiting

FIT5174 Parallel & Distributed Systems Dr. Ronald Pose Lecture MPI communications

FIT5174 Parallel & Distributed Systems Dr. Ronald Pose Lecture MPI basic datatypes for C

FIT5174 Parallel & Distributed Systems Dr. Ronald Pose Lecture MPI C data types

FIT5174 Parallel & Distributed Systems Dr. Ronald Pose Lecture MPI messages

FIT5174 Parallel & Distributed Systems Dr. Ronald Pose Lecture MPI point-to-point communications

FIT5174 Parallel & Distributed Systems Dr. Ronald Pose Lecture MPI point-to-point messages

FIT5174 Parallel & Distributed Systems Dr. Ronald Pose Lecture MPI point-to-point messages requirements

FIT5174 Parallel & Distributed Systems Dr. Ronald Pose Lecture Synchronous versus Asynchronous communications

FIT5174 Parallel & Distributed Systems Dr. Ronald Pose Lecture MPI blocking standard Send

FIT5174 Parallel & Distributed Systems Dr. Ronald Pose Lecture Send and Receive code fragment

FIT5174 Parallel & Distributed Systems Dr. Ronald Pose Lecture Other MPI Send options

FIT5174 Parallel & Distributed Systems Dr. Ronald Pose Lecture Considerations for MPI Send

FIT5174 Parallel & Distributed Systems Dr. Ronald Pose Lecture Performance of MPI Send

FIT5174 Parallel & Distributed Systems Dr. Ronald Pose Lecture MPI blocking Receive

FIT5174 Parallel & Distributed Systems Dr. Ronald Pose Lecture MPI Receive considerations

FIT5174 Parallel & Distributed Systems Dr. Ronald Pose Lecture MPI message passing restrictions

FIT5174 Parallel & Distributed Systems Dr. Ronald Pose Lecture Simple MPI ‘ping-pong’

FIT5174 Parallel & Distributed Systems Dr. Ronald Pose Lecture MPI deadlock scenario

FIT5174 Parallel & Distributed Systems Dr. Ronald Pose Lecture MPI correctness and fairness

FIT5174 Parallel & Distributed Systems Dr. Ronald Pose Lecture MPI bidirectional communication

FIT5174 Parallel & Distributed Systems Dr. Ronald Pose Lecture MPI non-blocking communication

FIT5174 Parallel & Distributed Systems Dr. Ronald Pose Lecture MPI non-blocking standard send

FIT5174 Parallel & Distributed Systems Dr. Ronald Pose Lecture MPI non-blocking receive

FIT5174 Parallel & Distributed Systems Dr. Ronald Pose Lecture Avoiding Deadlocks

FIT5174 Parallel & Distributed Systems Dr. Ronald Pose Lecture MPI non-blocking sends

FIT5174 Parallel & Distributed Systems Dr. Ronald Pose Lecture MPI non-blocking Synchronous Send

FIT5174 Parallel & Distributed Systems Dr. Ronald Pose Lecture MPI testing instead of waiting

FIT5174 Parallel & Distributed Systems Dr. Ronald Pose Lecture MPI with many outstanding calls

FIT5174 Parallel & Distributed Systems Dr. Ronald Pose Lecture Other MPI communications calls

FIT5174 Parallel & Distributed Systems Dr. Ronald Pose Lecture MPI persistent communication

FIT5174 Parallel & Distributed Systems Dr. Ronald Pose Lecture MPI persistent communications

FIT5174 Parallel & Distributed Systems Dr. Ronald Pose Lecture Useful MPI wildcards and constants

FIT5174 Parallel & Distributed Systems Dr. Ronald Pose Lecture MPI collective communications

FIT5174 Parallel & Distributed Systems Dr. Ronald Pose Lecture MPI synchronization

FIT5174 Parallel & Distributed Systems Dr. Ronald Pose Lecture MPI broadcast

FIT5174 Parallel & Distributed Systems Dr. Ronald Pose Lecture MPI gather

FIT5174 Parallel & Distributed Systems Dr. Ronald Pose Lecture MPI scatter

FIT5174 Parallel & Distributed Systems Dr. Ronald Pose Lecture MPI gather to all

FIT5174 Parallel & Distributed Systems Dr. Ronald Pose Lecture Using vectors

FIT5174 Parallel & Distributed Systems Dr. Ronald Pose Lecture Using vectors non-contiguously

FIT5174 Parallel & Distributed Systems Dr. Ronald Pose Lecture Using binary trees

FIT5174 Parallel & Distributed Systems Dr. Ronald Pose Lecture Using other kinds of trees

FIT5174 Parallel & Distributed Systems Dr. Ronald Pose Lecture All-to-All personalized communication

FIT5174 Parallel & Distributed Systems Dr. Ronald Pose Lecture MPI program structure summary

FIT5174 Parallel & Distributed Systems Dr. Ronald Pose Lecture MPI program summary

FIT5174 Parallel & Distributed Systems Dr. Ronald Pose Lecture MPI Simple C program

FIT5174 Parallel & Distributed Systems Dr. Ronald Pose Lecture MPI Safe C program

FIT5174 Parallel & Distributed Systems Dr. Ronald Pose Lecture MPI Deadlocking C program

FIT5174 Parallel & Distributed Systems Dr. Ronald Pose Lecture MPI buffering dependent C program

FIT5174 Parallel & Distributed Systems Dr. Ronald Pose Lecture Summarizing Distributed versus Shared Memory

FIT5174 Parallel & Distributed Systems Dr. Ronald Pose Lecture Hybrid programming

FIT5174 Parallel & Distributed Systems Dr. Ronald Pose Lecture Why use hybrid programming?