2008年 第10卷 第2期
多任务下I/O设备的动态功耗管理
东南大学国家专用集成电路系统工程技术研究中心，南京 210096
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摘要
减少I/O设备功耗已越来越被嵌入式系统设计者所关注。传统动态功耗管理（DPM）策略在实 际的多任务环境下无法得到预期的节能效果。提出基于堆栈的预测性超时（SBPT）策略。该 策略通过分析任务的调用和堆栈信息来预测任务对I/O设备的访问模式，并采用多请求源（MSR）模型进行多任务的联合预测。然后根据预测结果分组统计，采用超时技术决策。基于实 际负载的仿真实验表明SBPT策略能够适应多任务的应用环境，更稳定更有效地降低了功耗
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