Process group management in cross-layer adaptation

Wanghong Yuan, Klara Nahrstedt

Research output: Contribution to journalConference articlepeer-review


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.

Original languageEnglish (US)
Pages (from-to)55-68
Number of pages14
JournalProceedings of SPIE - The International Society for Optical Engineering
StatePublished - Dec 1 2004
EventMultimedia Computing and Networking 2004 - San Jose, CA, United States
Duration: Jan 21 2004Jan 22 2004


  • Adaptation
  • Energy Saving
  • Process Group Management
  • Quality of Service

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering

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