On the Influence of Thread Allocation for Irregular Codes in NUMA Systems
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F09%3A10005301" target="_blank" >RIV/00216208:11320/09:10005301 - isvavai.cz</a>
Result on the web
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DOI - Digital Object Identifier
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Alternative languages
Result language
angličtina
Original language name
On the Influence of Thread Allocation for Irregular Codes in NUMA Systems
Original language description
This work presents a study undertaken to characterise the FINISTERRAE supercomputer, one of the biggest NUMA systems in Europe. The main objective was to determine the performance effect of bus contention and cache coherency as well as the suitability ofporting strategies regarding irregular codes in such a complex architecture. Results show that: (1) cores which share a socket can be considered as independent processors in this context; (2) for big data sizes, the effect of sharing a bus degrades thefinal performance but masks the cache coherency effects; (3) the NUMA factor (remote to local memory latency ratio) is an important factor on irregular codes and (4) the default kernel allocation policy is not optimal in this system. These results allowus to understand the behaviour of thread-to-core mappings and memory allocation policies.
Czech name
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Czech description
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Classification
Type
D - Article in proceedings
CEP classification
IN - Informatics
OECD FORD branch
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Result continuities
Project
<a href="/en/project/7E08004" target="_blank" >7E08004: Quality Impact Prediction for Evolving Service-Oriented Software</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>Z - Vyzkumny zamer (s odkazem do CEZ)
Others
Publication year
2009
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Article name in the collection
Parallel and Distributed Computing: Applications and Technologies
ISBN
978-0-7695-3914-0
ISSN
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e-ISSN
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Number of pages
8
Pages from-to
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Publisher name
IEEE Computer Society
Place of publication
Neuveden
Event location
Hiroshima University, Hiroshima, Japan
Event date
Dec 8, 2009
Type of event by nationality
WRD - Celosvětová akce
UT code for WoS article
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