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Paper Abstract and Keywords
Presentation 2021-07-16 10:25
Evaluating the Effectiveness of Non-Temporal Instructions for Eliminating Cache Pollution in Virtual I/O
Daichi Takeya, Ryota Kawashima (NITech), Hiroki Nakayama, Tsunemasa Hayashi (BOSCO), Hiroshi Matsuo (NITech) ICM2021-16
Abstract (in Japanese) (See Japanese page) 
(in English) Cloud Native Network Functions (CNFs) have been adopted in cutting-edge commercial networks for flexible and agile operations; however, the throughput of them is reduced by about 40% at maximum compared to that of bare-metal environment. Our previous study revealed that CPU cache pollution in virtual network I/O (vhost-user) was the major performance bottleneck. To further improve the performance, explicit control of CPU cache usage is a primary goal because well-known optimization techniques, such as cache-line alignment and prefetching, have already been fully introduced in the implementation of vhost-user. While some approaches of explicitly controlling CPU caches were effective for network functions in a bare-metal environment, no such approach has been proposed for CNFs (i.e. virtual network I/O is not considered). In this paper, we analyze the CPU cache usage in virtual network I/O (host-guest direction) and examine Non-temporal instructions for improving the cache usage.
Keyword (in Japanese) (See Japanese page) 
(in English) NFV / DPDK / packet I/O / cache pollution / / / /  
Reference Info. IEICE Tech. Rep., vol. 121, no. 114, ICM2021-16, pp. 34-39, July 2021.
Paper # ICM2021-16 
Date of Issue 2021-07-08 (ICM) 
ISSN Online edition: ISSN 2432-6380
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)
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Conference Information
Committee ICM  
Conference Date 2021-07-15 - 2021-07-16 
Place (in Japanese) (See Japanese page) 
Place (in English) Online 
Topics (in Japanese) (See Japanese page) 
Topics (in English)  
Paper Information
Registration To ICM 
Conference Code 2021-07-ICM 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Evaluating the Effectiveness of Non-Temporal Instructions for Eliminating Cache Pollution in Virtual I/O 
Sub Title (in English)  
Keyword(1) NFV  
Keyword(2) DPDK  
Keyword(3) packet I/O  
Keyword(4) cache pollution  
1st Author's Name Daichi Takeya  
1st Author's Affiliation Nagoya Institute of Technology (NITech)
2nd Author's Name Ryota Kawashima  
2nd Author's Affiliation Nagoya Institute of Technology (NITech)
3rd Author's Name Hiroki Nakayama  
3rd Author's Affiliation BOSCO Technologies Inc. (BOSCO)
4th Author's Name Tsunemasa Hayashi  
4th Author's Affiliation BOSCO Technologies Inc. (BOSCO)
5th Author's Name Hiroshi Matsuo  
5th Author's Affiliation Nagoya Institute of Technology (NITech)
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Speaker Author-1 
Date Time 2021-07-16 10:25:00 
Presentation Time 25 minutes 
Registration for ICM 
Paper # ICM2021-16 
Volume (vol) vol.121 
Number (no) no.114 
Page pp.34-39 
Date of Issue 2021-07-08 (ICM) 

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