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Paper Abstract and Keywords
Presentation 2015-12-18 14:30
A Low Latency Distributed Routing Method for Random Topologies in HPC Networks
Ryuta Kawano, Hiroshi Nakahara (Keio Univ.), Ikki Fujiwara (NII), Hiroki Matsutani, Hideharu Amano (Keio Univ.), Michihiro Koibuchi (NII) ICD2015-90 CPSY2015-103
Abstract (in Japanese) (See Japanese page) 
(in English) End-to-end network latency has become an important issue for parallel application on large-scale High Performance Computing (HPC) systems. We have recently proposed a method to build topologies for HPC systems with high-radix switches by constructing random switch-to-switch links. To such topologies, however, we cannot adapt conventional routing methods for non-random topologies, such as XY routing for Mesh topologies, to prevent live-lock on wormhole switching networks. To support live-lock-freeness on packet switching in random topologies, previously we have to use a large size of routing tables for each router. In this report, we propose a new routing method to prevent live-locks with a smaller size of routing tables, which can minimize impact on the increase of network latencies. Experimental results show that by using our routing method we can suppress the increase of the average latencies by 11% and can reduce the size of routing tables by up to 51%.
Keyword (in Japanese) (See Japanese page) 
(in English) High-performance computing (HPC) / network topology / interconnection networks / / / / /  
Reference Info. IEICE Tech. Rep., vol. 115, no. 374, CPSY2015-103, pp. 105-110, Dec. 2015.
Paper # CPSY2015-103 
Date of Issue 2015-12-10 (ICD, CPSY) 
ISSN Print edition: ISSN 0913-5685    Online edition: ISSN 2432-6380
Copyright
and
reproduction		 All rights are reserved and no part of this publication may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopy, recording, or any information storage and retrieval system, without permission in writing from the publisher. Notwithstanding, instructors are permitted to photocopy isolated articles for noncommercial classroom use without fee. (License No.: 10GA0019/12GB0052/13GB0056/17GB0034/18GB0034)
Download PDF ICD2015-90 CPSY2015-103

Conference Information
Committee ICD CPSY  
Conference Date 2015-12-17 - 2015-12-18 
Place (in Japanese) (See Japanese page) 
Place (in English) Kyoto Institute of Technology 
Topics (in Japanese) (See Japanese page) 
Topics (in English)  
Paper Information
Registration To CPSY 
Conference Code 2015-12-ICD-CPSY 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) A Low Latency Distributed Routing Method for Random Topologies in HPC Networks 
Sub Title (in English)  
Keyword(1) High-performance computing (HPC)  
Keyword(2) network topology  
Keyword(3) interconnection networks  
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1st Author's Name Ryuta Kawano  
1st Author's Affiliation Keio University (Keio Univ.)
2nd Author's Name Hiroshi Nakahara  
2nd Author's Affiliation Keio University (Keio Univ.)
3rd Author's Name Ikki Fujiwara  
3rd Author's Affiliation National Institute of Informatics (NII)
4th Author's Name Hiroki Matsutani  
4th Author's Affiliation Keio University (Keio Univ.)
5th Author's Name Hideharu Amano  
5th Author's Affiliation Keio University (Keio Univ.)
6th Author's Name Michihiro Koibuchi  
6th Author's Affiliation National Institute of Informatics (NII)
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Speaker Author-1 
Date Time 2015-12-18 14:30:00 
Presentation Time 25 minutes 
Registration for CPSY 
Paper # ICD2015-90, CPSY2015-103 
Volume (vol) vol.115 
Number (no) no.373(ICD), no.374(CPSY) 
Page pp.105-110 
#Pages 6 
Date of Issue 2015-12-10 (ICD, CPSY) 

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