Implementation and Performance Optimization of a DPDK Packet Gateway on Manycore CPUs

Since approximately 2005, major processor manufacturers have shifted their architectural focus from instruction-level parallelism (ILP) toward multicore and manycore parallelism to achieve higher performance. Rather than relying on deeper pipelines and speculative execution, performance gains have increasingly been realized through thread-level parallelism (TLP). Consequently, the responsibility for efficiently utilizing processor resources has transitioned from hardware mechanisms to software implementations. This technical note examines design strategies for achieving deterministic, high-throughput packet processing on manycore architectures using the Data Plane Development Kit (DPDK). It presents a simplified Packet Gateway (PGW) pipeline implementation, analyzing cache-coherence effects, NUMA-local memory allocation, and multicore scheduling patterns critical to maintaining per-packet processing budgets under nanosecond-level constraints.