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LOCAL foilset NYNET Communication System NCS -- A New Multithreaded Message Passing Environment for ATM

Given by Salim Hariri at Rome Laboratory Review on August 10,1995. Foils prepared August 10,1995
Abstract * Foil Index for this file

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Overview of Message Passing Tools
Overview of NCS Design Approach
NCS Implementation Approach
Conclusion Remarks

Table of Contents for full HTML of NYNET Communication System NCS -- A New Multithreaded Message Passing Environment for ATM

This table of Contents Abstract

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Foil 1 A Multithreaded Message Passing Environment for ATM LAN/WAN

From NYNET Communication System Rome Laboratory Review -- August 10,1995. * Critical Information in IMAGE

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Salim Hariri

ECE Department

Syracuse University

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Foil 2 Presentation Outline

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Overview of Message Passing Tools

Overview of NCS Design Approach

NCS Implementation Approach

Conclusion Remarks

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Foil 3 Need for a New Communication System - I

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Foil 4 Need for a New Communication System - II

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Foil 5 Need for a new Communication Systyem - III

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Foil 6 P4 overview

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Foil 7 p4 initialization

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Foil 8 Communication in p4

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Foil 9 PVM overview

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Foil 10 PVM daemons (pvmd)

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Foil 11 Communication in PVM

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Foil 12 Communication Functions

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Foil 13 p4 vs PVM

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Foil 14 p4 vs PVM: Performance results

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Foil 15 Problems with Existing Systems

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Foil 16 Related Efforts

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Foil 17 Drawbacks

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Foil 18 Objectives of NYNET Communication Systems

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Foil 19 NCS Design Approach 1

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Simplicity

Simplify the network architecture by removing unnecessary network layer and replicated functions in transport and data link layer
Low latency protocols that can operate at Gigabit transfer rates

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Foil 20 NCS Design Approach 1

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Foil 21 NCS Design Approach 2

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Concurrent Data Transfers

Multiple, concurrent data transfer increases the utilization of the network resources and effective bandwidth.
parallel protocol processing, parallel data transfer between Host-NI and NI-Host.

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Foil 22 NCS Design Approach 2 -- Contd

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Foil 23 NCS Design Approach 3

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Bypass operating system to reduce number of data copying operations.

Have kernel buffers mapped to user address space.

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Foil 24 NCS Design Approach 3 -- Contd

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Foil 25 NCS Design Approach 4

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Provide services for overlapping communication with computation.

Have multiple threads per process.

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Foil 26 NCS Design Approach 4 -- Contd

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Foil 27 NCS Design Approach 5

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Modular Approach - support wide range of HPCC QOS requirements.

Multithread approach is flexible.

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Foil 28 NCS Design approach 5 -- Contd

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Foil 29 NYNET Communication System

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Foil 30 Higher Level Environment for NCS

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Foil 31 Generic model for an application

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Foil 32 NCS Primitives

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Foil 33 NCS Implementation Approach

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Foil 34 NCS_MTS Implementation

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Foil 35 NCS_MTS Implementation Contd

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Foil 36 Approach 1: Using P4

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Foil 37 NCS using P4 -- Approach 1

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Foil 38 Approch 2: Using ATM API

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Foil 39 NCS Using ATM API -- approach 2

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Foil 40 NCS Benchmarking and Evaluation

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Foil 41 Matrix Multiplication

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Foil 42 NYNET Applications

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Foil 43 JPEG Compression/Decompression

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Foil 44 JPEG Compression/Decompression Contd

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Foil 45 NYNET Applications -- JPEG Simulation

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Foil 46 Other NYNET Applications -- Video on Demand

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Foil 47 Collaboratory and Telemedicine on NYNET

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Foil 48 Drawbacks of ATM API

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Foil 49 Drawbacks of ATM API (cont.)

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Foil 50 Solutions

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Foil 51 Read/Write Traps

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Foil 52 Trap Interface

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Foil 53 Results

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Foil 54 Receive Mechanism in Fore device driver

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Foil 55 Receive mechanism with Trap Routine

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Foil 56 Problems experienced in implementing receive trap routines

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Foil 57 read trap handler

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Foil 58 recv trap interface

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Foil 59 recv Rountine Architecture

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Foil 60 NCS Process Communication architecture

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Foil 61 Thread based Programming paradigm

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Foil 62 NCS has two levels of threads

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Foil 63 Separate Control and Data daemons

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Foil 64 Control Daemons

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Foil 65 Multiple Flow Control

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Foil 66 Hierarchical Receive Queue Structure

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Foil 67 Hierarchical Receive Queue Structure

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Foil 68 Multicast: Existing schemes

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Foil 69 Multicast: NCS approach

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Foil 70 Advantages

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Foil 71 Observations

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Foil 72 Summary

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Completed NCS implementation using P4.

Benchmark/evaluation of NCS/P4 implementation.

Completed NCS implementation using PVM.

Work in progress evaluating NCS/PVM.

NCS/API implementation.

Send/Recv (complete).
Multicast, flow control (work in progress).

Northeast Parallel Architectures Center, Syracuse University, npac@npac.syr.edu

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