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Proceedings Paper

Process group management in cross-layer adaptation
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Paper Abstract

Our previous MMCN03 paper reported a cross-layer adaptation framework, GRACE-1, that coordinates the adaptation of CPU frequency/voltage, CPU scheduling, and application quality. GRACE-1 assumes that all application processes (or threads) are independent from each other and adapt individually. This assumption, however, is invalid for multi-threaded applications that include dependent and cooperative processes. To support the joint performance requirements of such dependent processes, this paper extends GRACE-1 with a process group management mechanism. The enhanced framework, called GRACE-grp, introduces a new OS abstraction, group control block, to provide the OS-level recognition and support of process groups. Through a group control block, dependent processes can explicitly set up a group and specify their dependency in the OS kernel. Consequently, GRACE-grp schedules and adapts them in a synchronized and consistent manner, thereby delivering joint performance guarantees. We have implemented and evaluated the GRACE-grp framework. Our experimental results show that compared to GRACE-1, GRACE-grp provides better support for the joint quality of dependent processes and reduces CPU energy consumption by 6.2% to 8.7% for each process group.

Paper Details

Date Published: 15 December 2003
PDF: 14 pages
Proc. SPIE 5305, Multimedia Computing and Networking 2004, (15 December 2003); doi: 10.1117/12.538821
Show Author Affiliations
Wanghong Yuan, Univ. of Illinois/Urbana-Champaign (United States)
Klara Nahrstedt, Univ. of Illinois/Urbana-Champaign (United States)

Published in SPIE Proceedings Vol. 5305:
Multimedia Computing and Networking 2004
Nalini Venkatasubramanian, Editor(s)

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