CPU service classes for multimedia applications

Author

Chu, Hao-Hua ; Nahrstedt, Klara

Author_Institution

Illinois Univ., Urbana, IL, USA

Volume

1

fYear

1999

fDate

36342

Firstpage

296

Abstract

We present the design, implementation, and experimental results of our soft real time (SRT) system for multimedia applications on top of a general purpose UNIX environment. The SRT system supports multiple CPU service classes for the real time processes based on their processor usage pattern including periodic constant processing time class (PCPT) and periodic variable processing time (PVPT) class. It also provides the following features: reservation and processing time guarantees for the service classes; overrun protection and scheduling algorithm; and system-initiated adaptation strategies. The other unique feature of the SRT system is its easy portability to any operating systems with real time extensions because it is implemented purely in the user space without any modifications to the kernel. We have implemented the SRT system on the Solaris 2.6 operating system with scheduling overhead under 400us and with good performance guarantees

Keywords

Unix; multimedia systems; real-time systems; scheduling; software performance evaluation; software portability; CPU service classes; Solaris; UNIX; experimental results; multimedia applications; operating systems; overrun protection; performance guarantees; periodic constant processing time class; periodic variable processing time class; processing time guarantees; processor usage pattern; scheduling; soft real time system; software portability; Decoding; Hardware; Kernel; Multimedia systems; Operating systems; Protection; Real time systems; Scheduling algorithm; Streaming media; Timing;

fLanguage

English

Publisher

ieee

Conference_Titel

Multimedia Computing and Systems, 1999. IEEE International Conference on

Conference_Location

Florence

Print_ISBN

0-7695-0253-9

Type

conf

DOI

10.1109/MMCS.1999.779220

Filename

779220