一种基于热页迁移的虚拟机动态缓存划分方法

Static cache partitioning can reduce inter-application cache inferences and improve the composite performance of a cache-polluted application and a cache-sensitive application when they run on the cores that share the last level cache in the same multi-core processor. In a virtualized system, since different applications might run on virtual machines (VMs) in different time, it's inapplicable to partition the cache statically in advance. This paper proposes a dynamic cache partitioning scheme that makes use of hot-page detection and page migration to improve the composite performance of co-hosted virtual machines dynamically according to prior knowledge of cache-sensitive applications. Experimental results show that the overhead of our page migration scheme is low, while in most cases, the composite performance is an improvement over free composition.