OpenMP and NUMA architectures I: Investigating memory placement on the SGI origin 3000

Nathan Robertson, Alistair Rendell

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

The OpenMP programming model is based upon the assumption of uniform memory access. Virtually all current day large scale shared memory computers exhibit some degree of Non-Uniform Memory Access (NUMA). Should OpenMP be extended for NUMA architectures? This paper aims to quantify NUMA effects on the SGI Origin 3000 system as a prelude to answering this important question. We discuss the tools required to study NUMA effects and use them in the study of latency, bandwidth and the solution of a 2-D heat diffusion problem.

Original languageEnglish
Pages (from-to)648-656
Number of pages9
JournalLecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics)
Volume2660
DOIs
Publication statusPublished - 1 Dec 2003
Externally publishedYes

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