Abstract
GPU accelerators may provide great performance improvements in the context of parallel applications. However, their use in HPC clusters may also present some disadvantages such as their high cost and high power consumption. In addition, this kind of accelerators are generally underutilized. Remote GPU virtualization could be a solution to overcome these drawbacks, but its performance is usually impaired because the network bandwidth is lower than the PCIe one. In this paper we analyze how the InfiniBand Connect-IB network adapters (with performance similar to that of PCIe 3.0) reduce the overhead of remote GPU virtualization. We show that this overhead is decreased to 1.5% in terms of bandwidth, and to 0.51% in the tested application.