Experiences with adaptive QOS mapping scheme

Tatsuo Nakajima, Hiroshi Fujita

Research output: Contribution to conferencePaper

Abstract

In multimedia computing, guaranteeing Quality of Service(QOS) is one of the most important topics. If QOS values specified by users are not ensured, the users may not put up with the degraded quality of media streams. However, operating systems cannot understand QOS values specified by users directly, then the QOS values should be mapped to the CPU capacity that is required for guaranteeing the QOS values. There are two approaches for realizing the mapping. In the first approach called static mapping, the mapping is calculated before applications are started. In the second approach called dynamic mapping, the mapping is calculated at run-time. The system monitors the actual CPU utilization of continuous media applications, and adjusts their reserved CPU resources at run-time. The advantage of the approach is that it does not require to estimate the CPU utilization that each application requires. In this paper, we propose an adaptive QOS mapping scheme using a feedback control. Also, we show that high level QOS values can be adjusted according to the reserved CPU capacity by using our algorithm.

Original languageEnglish
Pages261-268
Number of pages8
Publication statusPublished - 1996 Dec 1
Externally publishedYes
EventProceedings of the 1996 3rd International Workshop on Real-Time Computing Systems and Applications - Seoul, South Korea
Duration: 1996 Oct 301996 Nov 1

Other

OtherProceedings of the 1996 3rd International Workshop on Real-Time Computing Systems and Applications
CitySeoul, South Korea
Period96/10/3096/11/1

ASJC Scopus subject areas

  • Computer Science(all)

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    Nakajima, T., & Fujita, H. (1996). Experiences with adaptive QOS mapping scheme. 261-268. Paper presented at Proceedings of the 1996 3rd International Workshop on Real-Time Computing Systems and Applications, Seoul, South Korea, .