https://scholars.lib.ntu.edu.tw/handle/123456789/607468
Title: | ITRIM: I/O-Aware TRIM for Improving User Experience on Mobile Devices | Authors: | Liang Y Ji C Fu C Ausavarungnirun R Li Q Pan R Chen S Shi L Kuo T.-W TEI-WEI KUO |
Keywords: | Discard;F2FS;mobile device;TRIM;user experience;File organization;User experience;File systems;Flash storage;Garbage collection;Idle time;Number of datum;System levels;Digital storage | Issue Date: | 2021 | Journal Volume: | 40 | Journal Issue: | 9 | Start page/Pages: | 1782-1795 | Source: | IEEE Transactions on Computer-Aided Design of Integrated Circuits and Systems | Abstract: | TRIM is a recommended command to deliver data invalidation information of the file system to flash storage. It is issued on both system level and device level. Since it can reduce the number of data copies during device-level garbage collection (DGC), TRIM has been widely used to improve the endurance and performance of mobile devices. Contrary to the common belief, this work identifies that the default TRIM scheme has both merit and drawback to the performance of mobile devices, especially in flash-friendly file system (F2FS), which is a commonly used file system in mobile devices. On one hand, TRIM can reduce garbage collection migration to prolong the flash lifetime as well as improving I/O throughput; On the other hand, TRIM may induce I/O contentions. This article proposes a new TRIM scheme, iTRIM, to distribute the timing overheads to system idle time. To further reduce I/O contention and improve I/O performance, the design of iTRIM considers the TRIM size, and the logical addresses' pattern of victim invalidated data. Experimental results show that iTRIM can minimize I/O contentions while retaining the benefits of the default TRIM scheme for endurance and performance. ? 1982-2012 IEEE. |
URI: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-85091951502&doi=10.1109%2fTCAD.2020.3027656&partnerID=40&md5=8504d7c45906eafbeca75970d2bb356e https://scholars.lib.ntu.edu.tw/handle/123456789/607468 |
ISSN: | 02780070 | DOI: | 10.1109/TCAD.2020.3027656 |
Appears in Collections: | 資訊工程學系 |
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