SHF: Small: Power Husbanding via Architectural Techniques (PHAT)

功耗已成为计算机系统的主要设计约束。ITRS路线图指出：“电源管理现在是大多数应用领域的首要问题。“最坏情况下的电源供应已经让位于功率上限，这在必要时会限制性能。不幸的是，电力封顶类似于电力管制，它惩罚的是电力公司的所有客户，而不是那些最能忍受停电的人。 本研究的主题是，计算机系统应该把权力作为一种宝贵的资源来加以利用：节俭地指导和管理;以良好的目的和最佳的优势来使用或使用。该研究将通过架构技术来研究有效的电源管理，这些架构技术可以在不同的硬件组件之间适当地转移电源，就像良好的预算将资金用于最有效的地方一样。 功率调度解决方案包括（a）用于估计资源使用的低开销在线机制，（B）用于动态地改变资源的操作级别的低成本技术，以及（c）用于达到功率高效操作配置的有效策略。研究将扩展可重构缓存的先前成就，以实现细粒度的在线控制，扩展先前的核心架构并开发新的核心架构，以实现性能和功耗的比例缩放，并适应和开发新的存储系统，通常占系统功耗的30%。PI将继续通过学生，课程，讲座，工业分支机构，商业影响力和开源模拟基础设施来推进最先进的技术。

Power consumption has become a dominant design constraint for computer systems. The ITRS Roadmap states: "power management is now the primary issue across most application segments." Worst-case power provisioning has given way to power capping, which throttles performance when necessary. Unfortunately, power-capping is analogous to brown-outs, which penalize all customers of an electrical utility, rather than those who can best tolerate loss of power. The thesis of this research is that computer systems should treat power as a precious resource to be husbanded: To direct and manage with frugality; to use or employ to good purpose and the best advantage. The research will investigate effective power husbanding via architectural techniques that appropriately shift power between different hardware components, much as good budgeting applies money where it is most effective. Power husbanding solutions include (a) low-overhead online mechanisms to estimate resource use, (b) low-cost techniques for dynamically changing a resource's operational level, and (c) effective policies for reaching power efficient operating configurations. Research will extend previous accomplishments on reconfigurable caches to enable online control at fine granularities, extend previous and develop new core architectures to enable proportional scaling of performance and power, and adapt and develop new memory systems which often accounting for 30% of system power.Power husbanding seeks to make computation more power efficient, which has important national and global implications. The PIs will continue to advance the state-of-the-art through students, courses, talks, industrial affiliates, commercial influence, and open-source simulation infrastructure.