OS I/O path optimizations for flash solid-state drives

Woong Shin; Qichen Chen; Myoungwon Oh; Hyeonsang Eom; Heon Y. Yeom

OS I/O path optimizations for flash solid-state drives

Woong Shin, Qichen Chen, Myoungwon Oh, Hyeonsang Eom, Heon Y. Yeom

Analytics and AI Methods at Scale

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

39 Scopus citations

Abstract

In this paper, we present OS I/O path optimizations for NAND flash solid-state drives, aimed to minimize scheduling delays caused by additional contexts such as interrupt bottom halves and background queue runs. With our optimizations, these contexts are eliminated and merged into hardware interrupts or I/O participating threads without introducing side effects. This was achieved by pipelining fine grained host controller operations with the cooperation of I/O participating threads. To safely expose fine grained host controller operations to upper layers, we present a low level hardware abstraction layer interface. Evaluations with micro-benchmarks showed that our optimizations were capable of accommodating up to five, AHCI controller attached, SATA 3.0 SSD devices at 671k IOPS, while current Linux SCSI based I/O path was limited at 354k IOPS failing to accommodate more than three devices. Evaluation on an SSD backed key value system also showed IOPS improvement using our I/O optimizations.

Original language	English
Title of host publication	Proceedings of the 2014 USENIX Annual Technical Conference, USENIX ATC 2014
Publisher	USENIX Association
Pages	483-488
Number of pages	6
ISBN (Electronic)	9781931971102
State	Published - 2014
Event	2014 USENIX Annual Technical Conference, USENIX ATC 2014 - Philadelphia, United States Duration: Jun 19 2014 → Jun 20 2014

Publication series

Name	Proceedings of the 2014 USENIX Annual Technical Conference, USENIX ATC 2014

Conference

Conference	2014 USENIX Annual Technical Conference, USENIX ATC 2014
Country/Territory	United States
City	Philadelphia
Period	06/19/14 → 06/20/14

Funding

We would like to thank the anonymous USENIX ATC reviewers and our shepherd Kai Shen for comments that helped improve this paper. This work was supported by the National Research Foundation of Korea (NRF) grants 2010-0020731 and NRF-2013R1A1A2064629. The ICT at Seoul National University provided research facilities for this study.

Cite this

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title = "OS I/O path optimizations for flash solid-state drives",

abstract = "In this paper, we present OS I/O path optimizations for NAND flash solid-state drives, aimed to minimize scheduling delays caused by additional contexts such as interrupt bottom halves and background queue runs. With our optimizations, these contexts are eliminated and merged into hardware interrupts or I/O participating threads without introducing side effects. This was achieved by pipelining fine grained host controller operations with the cooperation of I/O participating threads. To safely expose fine grained host controller operations to upper layers, we present a low level hardware abstraction layer interface. Evaluations with micro-benchmarks showed that our optimizations were capable of accommodating up to five, AHCI controller attached, SATA 3.0 SSD devices at 671k IOPS, while current Linux SCSI based I/O path was limited at 354k IOPS failing to accommodate more than three devices. Evaluation on an SSD backed key value system also showed IOPS improvement using our I/O optimizations.",

author = "Woong Shin and Qichen Chen and Myoungwon Oh and Hyeonsang Eom and Yeom, \{Heon Y.\}",

note = "Publisher Copyright: {\textcopyright} Proceedings of the 2014 USENIX Annual Technical Conference, USENIX ATC 2014. All rights reserved.; 2014 USENIX Annual Technical Conference, USENIX ATC 2014 ; Conference date: 19-06-2014 Through 20-06-2014",

year = "2014",

language = "English",

series = "Proceedings of the 2014 USENIX Annual Technical Conference, USENIX ATC 2014",

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Shin, W, Chen, Q, Oh, M, Eom, H & Yeom, HY 2014, OS I/O path optimizations for flash solid-state drives. in Proceedings of the 2014 USENIX Annual Technical Conference, USENIX ATC 2014. Proceedings of the 2014 USENIX Annual Technical Conference, USENIX ATC 2014, USENIX Association, pp. 483-488, 2014 USENIX Annual Technical Conference, USENIX ATC 2014, Philadelphia, United States, 06/19/14.

OS I/O path optimizations for flash solid-state drives. / Shin, Woong; Chen, Qichen; Oh, Myoungwon et al.
Proceedings of the 2014 USENIX Annual Technical Conference, USENIX ATC 2014. USENIX Association, 2014. p. 483-488 (Proceedings of the 2014 USENIX Annual Technical Conference, USENIX ATC 2014).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

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BT - Proceedings of the 2014 USENIX Annual Technical Conference, USENIX ATC 2014

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OS I/O path optimizations for flash solid-state drives

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