Denial of Service in CPU-GPU Heterogeneous Architectures

Unlike the traditional CPU-GPU heterogeneous architecture where CPU and GPU have separate DRAM and memory address space, current heterogeneous CPU-GPU architectures integrate CPU and GPU in the same die and share the same last level cache (LLC), on-chip network and memory. In this paper, we demonstrate that both CPU and GPU applications can maliciously or unintentionally monopolize the shared resource such as LLC and on-chip interconnection, resulting in significant performance loss to each other.