A 48-Core IA-32 Processor in 45 nm CMOS Using On-Die Message-Passing and DVFS fo

Abstract

This paper describes a multi-core processor that integrates 48 cores, 4 DDR3 memory channels, and a voltage regulator controller in a 6 4 2D-mesh network-on-chip ar- chitecture. Located at each mesh node is a five-port virtual cut-through packet-switched router shared between two IA-32 cores. Core-to-core communication uses message passing while exploiting 384 KB of on-die shared memory. Fine grain power management takes advantage of 8 voltage and 28 frequency islands to allow independent DVFS of