A Partial Workload Offloading Framework in a Mobile Cloud Computing Context

摘要

Mobile devices have become increasingly prevalent in recent years, leading the public to reassess their expectations in terms of user experience. As a result, industry has progressively turned to utilizing hardware components, such as GPUs (graphics processing units), which are traditionally present on computers. Despite their sophistication, mobile devices lack the capacity to execute resource-intensive tasks quickly and efficiently, and the state of the art is to leverage heterogeneous cloud resources to augment mobile devices. However, network transfer costs drastically limit the advantage of this approach. While performing computing tasks on a heterogeneous system is a well-studied area, how to offload workload onto a heterogeneous cloud in the presence of an unstable network remains an outstanding problem. This paper presents the design and implementation of a workload offloading framework that transparently mitigates the network transfer cost and takes advantage of a heterogeneous resource-rich cloud for speeding up mobile devices' GPGPU computations. Our approach is based on an adaptive method that partitions the workload and maps the processing elements to heterogeneous local and remote resources. By partitioning the tasks, our system increases the utilization of mobile and server resources while reducing the amount of data to transfer over the network. Our results show that adaptive partitioning can have a significant impact on the performance of benchmarks, even in a dynamic environment.