'Send buffer' diaporamas de présentation

Lecture 2: Transport and Hardware

Lecture 2: Transport and Hardware. Challenge: No centralized state Lossy communication at a distance Sender and receiver have different views of reality No centralized arbiter of resource usage Layering: benefits and problems. Outline.

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MPI

MPI. Outline. References and review Buffering, deadlocks and collective comm. Types Wildcards Using Status and Probing Asynchronous communication Global communications Advanced topics "V" operations, Derived types, Communicators, Cartesian stuff. References:.

1.1k views • 81 slides

NCKU HPC Education & Training

NCKU HPC Education & Training. 2008.03.27. Jih-Ching Chang bluesun@mail.ncku.edu.tw. Outline. HPC Introduction Easy User Guide of NCKU HPC MPI. Shared Memory VS Distributed Memory OpenMP MPI. Infrastructure and Architecture. IB. 1GE. FC. TANET. Hardware.

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Performance Diagnosis and Improvement in Data Center Networks

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Chapter 7 Socket Option

Chapter 7 Socket Option. abstraction. Introduction getsockopt and setsockopt function socket state Generic socket option IPv4 socket option ICMPv6 socket option IPv6 socket option TCP socket option fcnl function. Introduction.

1.06k views • 51 slides

Socket I/O

Socket I/O. 2005. 6. 8 ? ? ? steigensonne@hufs.ac.kr. Concept. Code Introduction Socket Buffer Write, writev, sendto, sendmsg Sendit Function Sosend Function Read, readv, recvfrom, recvmsg Recvmsg systemp call Recvit Function Soreceive Function. Code Intro. Socket Buffers.

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Collective Communication

Collective Communication. Collective Communication. Collective communication is defined as communication that involves a group of processes More restrictive than point to point Data sent is same as the data received, i.e. type, amount

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Unix Network Programming A Case Study: Crawler Design

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Transport Protocols Overview

Transport Protocols Overview. provide logical communication between app processes running on different hosts transport protocols run in end systems send side: breaks app messages into segments , passes to network layer rcv side: reassembles segments into messages, passes to app layer

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MPI_AlltoAllv Function Outline

MPI_AlltoAllv Function Outline. int MPI_Alltoallv ( void *sendbuf, int *sendcnts, int *sdispls, MPI_Datatype sendtype, void *recvbuf, int *recvcnts, int *rdispls, MPI_Datatype recvtype, MPI_Comm comm ) Input Parameters

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COLUMNWISE BLOCK-STRIPED DECOMPOSITION

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Socket Programming

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Autotuning in Web100

Autotuning in Web100. John W. Heffner August 1, 2002 Boulder, CO. A Senior Thesis. Wrote senior honors thesis on autotuning. Since integrated the code into the Web100 kernel. Currently in CVS, not released. This talk is mainly based on that work.

346 views • 21 slides

Chapter 5 End-to-End Protocols

Chapter 5 End-to-End Protocols. Outline 5.1 UDP 5.2 TCP 5.3 Remote Procedure Call. End-to-End Protocols. Underlying best-effort network drop messages re-orders messages delivers duplicate copies of a given message limits messages to some finite size

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Reliable Byte-Stream (TCP)

Reliable Byte-Stream (TCP). Outline Connection Establishment/Termination Sliding Window Revisited Flow Control Adaptive Timeout. End-to-End Protocols. Underlying best-effort network drop messages re-orders messages delivers duplicate copies of a given message

275 views • 19 slides

Reliable Byte-Stream (TCP)

Reliable Byte-Stream (TCP). Outline Connection Establishment/Termination Sliding Window Revisited Flow Control Adaptive Timeout. End-to-End Protocols. Underlying best-effort network drop messages re-orders messages delivers duplicate copies of a given message

360 views • 17 slides

MPI_Gatherv

MPI_Gatherv. CISC372 Fall 2006 Andrew Toy Tom Lynch Bill Meehan. Before. Before. After. Syntax of MPI_Gatherv. int MPI_Gatherv ( void *sendbuf, int sendcnt, MPI_Datatype sendtype, void *recvbuf, int *recvcnts, int *displs, MPI_Datatype recvtype, int root, MPI_Comm comm ).

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Blocking / Non-Blocking Send and Receive Operations

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Send Buffer Access

Send Buffer Access. MPI Forum meeting 1/2008. Send Buffer Access. Background:

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PP Lab

PP Lab. MPI programming VI. Program 1. Write a parallel program that calculates the sum of all numbers in a vector. Calculate the partial sums . Add the partial sums for the final answer. Functions to be used. MPI_Scatter: Sends data from one task to all other tasks in a group. Synopsis:

237 views • 6 slides