Skip to main content
USENIX
  • Conferences
  • Students
Sign in
  • Home
  • Attend
    • Registration Information
    • Registration DIscounts
    • Venue, Hotel, and Travel
    • Students and Grants
  • Program
    • At a Glance
    • Technical Sessions
    • Training Program
    • Poster Sessions
    • WiPs
  • Activities
    • Birds-of-a-Feather Sessions
    • Poster Sessions
  • Sponsorship
  • Participate
    • Call for Papers
    • Call for Posters and WiPs
    • Instructions for Participants
  • About
    • Conference Organizers
    • Questions?
    • Services
    • Help Promote!
    • Past Conferences
  • Home
  • Attend
    • Registration Information
    • Registration DIscounts
    • Venue, Hotel, and Travel
    • Students and Grants
  • Program
    • At a Glance
    • Technical Sessions
    • Training Program
    • Poster Sessions
    • WiPs
  • Activities
  • Sponsorship
  • Participate
    • Call for Papers
    • Call for Posters and WiPs
    • Instructions for Participants
  • About
    • Conference Organizers
    • Questions?
    • Services
    • Help Promote!
    • Past Conferences

sponsors

Platinum Sponsor
Gold Sponsor
Gold Sponsor
Gold Sponsor
Gold Sponsor
Bronze Sponsor
Bronze Sponsor
Bronze Sponsor
Bronze Sponsor
Bronze Sponsor
Bronze Sponsor
General Sponsor
General Sponsor
Media Sponsor
Media Sponsor
Media Sponsor
Media Sponsor
Media Sponsor
Media Sponsor
Media Sponsor
Media Sponsor
Media Sponsor
Media Sponsor
Media Sponsor
Media Sponsor
Industry Partner
Industry Partner
Industry Partner

help promote

FAST '15 button

Get more
Help Promote graphics!

connect with us


  •  Twitter
  •  Facebook
  •  LinkedIn
  •  Google+
  •  YouTube

twitter

Tweets by @usenix

usenix conference policies

  • Event Code of Conduct
  • Conference Network Policy
  • Statement on Environmental Responsibility Policy

You are here

Home » Boosting Quasi-Asynchronous I/O for Better Responsiveness in Mobile Devices
Tweet

connect with us

http://twitter.com/usenix
https://www.facebook.com/pages/USENIX-Association/124487434386
http://www.linkedin.com/groups/USENIX-Association-49559/about
https://plus.google.com/108588319090208187909/posts
http://www.youtube.com/user/USENIXAssociation

Boosting Quasi-Asynchronous I/O for Better Responsiveness in Mobile Devices

Authors: 

Daeho Jeong, Samsung Electronics Co.; Youngjae Lee and Jin-Soo Kim, Sungkyunkwan University

Abstract: 

Providing quick system response for mobile devices is of great importance due to their interactive nature. However, we observe that the latency of file system operations increases dramatically under heavy asynchronous I/Os in the background. A careful analysis reveals that most of the delay arises from an unexpected situation where the file system operations are blocked until one or more asynchronous I/O operations are completed. We call such an I/O—which is issued as an asynchronous I/O but has the property of a synchronous I/O as some tasks are blocked on it—Quasi-Asynchronous I/O (QASIO).

We classify the types of dependencies between tasks and QASIOs and then show when such dependencies occur in the Linux kernel. Also, we propose a novel scheme to detect QASIOs at run time and boost them over the other asynchronous I/Os in the I/O scheduler. Our measurement results on the latest smartphone demonstrate that the proposed scheme effectively improves the responsiveness of file system operations.

Daeho Jeong, Samsung Electronics Co.

Youngjae Lee, Sungkyunkwan University

Jin-Soo Kim, Sungkyunkwan University

Open Access Media

USENIX is committed to Open Access to the research presented at our events. Papers and proceedings are freely available to everyone once the event begins. Any video, audio, and/or slides that are posted after the event are also free and open to everyone. Support USENIX and our commitment to Open Access.

BibTeX
@inproceedings {188442,
author = {Daeho Jeong and Youngjae Lee and Jin-Soo Kim},
title = {Boosting {Quasi-Asynchronous} {I/O} for Better Responsiveness in Mobile Devices},
booktitle = {13th USENIX Conference on File and Storage Technologies (FAST 15)},
year = {2015},
isbn = {978-1-931971-201},
address = {Santa Clara, CA},
pages = {191--202},
url = {https://www.usenix.org/conference/fast15/technical-sessions/presentation/jeong},
publisher = {USENIX Association},
month = feb,
}
Download
Jeong PDF
View the slides

Presentation Video 

Presentation Audio

MP3 Download

Download Audio

  • Log in or    Register to post comments

Platinum Sponsors

Gold Sponsors

Bronze Sponsors

General Sponsors

Media Sponsors & Industry Partners

© USENIX

  • Privacy Policy
  • Contact Us