32-core CMP with multi-sliced L2: 2 and 4 cores sharing a L2 slice

• Mario Donato Marino USP

Abstract

Nowadays the market is moving to have multiple cores on the same chip (Chip Multiprocessors - CMP) with a multi-sliced L2 which is shared by 2 cores. CMPs with 8 cores can already be found, and future CMPs will have more than 8 cores. It's interesting to have more than 2 cores sharing their L2 slice. So, the idea is to evaluate future CMPs with 4 processors sharing the same L2 slice, compare them to the present ones with 2 processors sharing it and also with processors with 1 processor per L2. We construct a model and evaluate it with a full-system simulation, using 32 processors, under SPLASH-2 benchmarks. Previous results show that the execution time is improved of about 8.7% for FMM to 40.3% for Radiosity.

Keywords: Delay, Tiles, Power dissipation, Roads, Scalability, Wire