CAREER: Parallel, Scalable, and Efficient I/O for Network Servers

网络已经成为现代计算机系统不可或缺的一部分，因此网络子系统的体系结构是一个关键的设计考虑因素。在过去，由于处理器性能的指数级改进，网络子系统的性能一直与网络带宽增长保持同步。然而，为了抵消现代单处理器日益增长的复杂性和线路受限的性质，芯片多处理和同时多线程已经成为占主导地位的微处理器体系结构。这些体系结构牺牲了单处理器的性能增长来支持更高的并行性，因此当前依赖单线程性能的网络子系统将无法在未来的系统中使网络饱和。该项目将开发新的网络子系统架构，以有效利用下一代微处理器并最大限度地提高网络性能。这项研究将通过考虑网络子系统的所有级别，包括操作系统的网络堆栈、网络设备驱动程序、I/O系统和网络接口硬件，来提高网络的并行性和可扩展性。这将导致调整网络子系统内的硬件和软件接口，以便为微处理器和网络接口之间的并行通信和协作处理提供机制。该项目还将用于让学生在本科生和研究生的计算机系统和体系结构课程中接触系统级的网络问题。

Networking has become an integral part of modern computer systems, so the architecture of the network subsystem is a critical design consideration. In the past, the performance of the network subsystem has kept up with network bandwidth growth because of the exponential rate of improvement in processor performance. However, to counteract the increasing complexity and wire-limited nature of modern uniprocessors, chip multiprocessing and simultaneous multithreading have emerged as dominant microprocessor architectures. These architectures sacrifice uniprocessor performance growth in favor of increased parallelism, so current network subsystems that rely on single-thread performance will be unable to saturate the network in future systems. This project will develop new network subsystem architectures to efficiently utilize next generation microprocessors and maximize network performance. This research will improve networking parallelism and scalability by considering all levels of the network subsystem, including the operating system's network stack, network device drivers, the I/O system, and network interface hardware. This will result in a restructuring of the hardware and software interfaces within the network subsystem to provide mechanisms for parallel communication and collaborative processing between microprocessors and network interfaces. This project will also be used to expose students to system-level networking issues in both undergraduate and graduate computer systems and architecture courses.