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Paper Abstract and Keywords
Presentation 2026-03-04 10:45
A Cause of Inefficiency in Packet Copying on Virtualized Systems
Shunsuke Oka, Ryota Kawashima (NITech), Hiroki Nakayama, Tsunemasa Hayashi (Bosco Technologies), Hiroshi Matsuo (NITech) NS2025-234
Abstract (in Japanese) (See Japanese page) 
(in English) A cloud-native nature of highly softwarized network functions play a key role in AI-driven next generation network slicing. Cloud-native Network Functions (CNFs) base on layered abstraction on commodity servers, resulting in superior developability and manageability. On the other hand, current CNFs have inefficiency issues related to packet forwarding. Packet
transfer involving memory copy between the guest (VM or container) and the host environment is the bottleneck in performance, and various zero-copying approachs have been proposed to remove this bottleneck. However, embodying a zero-copying approach
violates system layers, and degrades system security and manageability. Hence, improving the efficiency of packet copying merits detailed consideration. In this paper, we analyze the effect of packet copying on forwarding efficiency of CNFs. The result showed that a true cause of performance degradation was in CPU cache usage related to packet copying.
Keyword (in Japanese) (See Japanese page) 
(in English) CNF / 6G / Zero-copying / CPU Caching / / / /  
Reference Info. IEICE Tech. Rep., vol. 125, no. 385, NS2025-234, pp. 78-83, March 2026.
Paper # NS2025-234 
Date of Issue 2026-02-25 (NS) 
ISSN 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 NS2025-234

Conference Information
Committee IN NS  
Conference Date 2026-03-04 - 2026-03-06 
Place (in Japanese) (See Japanese page) 
Place (in English) Okinawa-Ken Shichoson Jichi Kaikan 
Topics (in Japanese) (See Japanese page) 
Topics (in English) General 
Paper Information
Registration To NS 
Conference Code 2026-03-IN-NS 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) A Cause of Inefficiency in Packet Copying on Virtualized Systems 
Sub Title (in English)  
Keyword(1) CNF  
Keyword(2) 6G  
Keyword(3) Zero-copying  
Keyword(4) CPU Caching  
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Keyword(6)  
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1st Author's Name Shunsuke Oka  
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 Technologies)
4th Author's Name Tsunemasa Hayashi  
4th Author's Affiliation BOSCO Technologies Inc. (Bosco Technologies)
5th Author's Name Hiroshi Matsuo  
5th Author's Affiliation Nagoya Institute of Technology (NITech)
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Speaker Author-1 
Date Time 2026-03-04 10:45:00 
Presentation Time 25 minutes 
Registration for NS 
Paper # NS2025-234 
Volume (vol) vol.125 
Number (no) no.385 
Page pp.78-83 
#Pages 6 
Date of Issue 2026-02-25 (NS) 

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