UltraShare: FPGAbased Dynamic Accelerator Sharing and Allocation Despite all the available commercial and opensource frameworks to ease deploying FPGAs in accelerating applications, the current schemes fail to support sharing multiple accelerators among various applications. There are three main features that an accelerator sharing scheme requires to support: exploiting dynamic parallelism of multiple accelerators, sharing accelerators among multiple applications, and providing a nonblocking congestionfree environment for multiple applications to call multiple accelerators. In this paper, we developed a scalable fully functional hardware controller, called UltraShare, with a supporting software stack that provides a dynamic accelerator sharing scheme through an accelerators grouping mechanism. UltraShare allows software applications to fully utilize FPGA accelerators in a nonblocking congestionfree environment. Our experimental results for a simple scenario of a combination of three streaming accelerators invocation show an improvement of up to 8x in throughput of the accelerators by removing accelerators idle times.

Network Enabled Partial Reconfiguration for Distributed FPGA Edge Acceleration Partial reconfiguration supports virtualisation of applications on FPGAs, enabling compute to dynamically adapt to workloads in distributed infrastructure and datecenters. While the latter often makes use of the PCIe interface and supporting infrastructure to allocate and load compute kernels via a host CPU, FPGAs are becoming increasingly popular as standalone resources in edgecomputing, requiring them to manage accelerators autonomously. This paper presents a platform that supports the managing of accelerator bitstreams over the network interface on a Xilinx Zynq device without intervention by the Arm processor. We compare against traditional vendor provided PR management for both library accelerators and custom accelerators and show that we achieve a 29% decrease in reconfiguration trigger latency using this approach.