Real World Multicore Embedded Systems

Chapter 4

Memory Models for Embedded Multicore Architecture

Gitu Jain, Software Engineer, Synopsys

Chapter Outline

Introduction

Memory types

Memory architecture

Cache

Translation lookaside buffer (TLB)

Instruction cache

Data cache

Cache customization

Virtual memory

Scratch pad

Software overlays

DMA

DRAM

Special-purpose memory

Memory structure of multicore architecture

Shared memory architecture

Uniform memory access (UMA)

Non-uniform memory access (NUMA)

Distributed memory architecture

Cache memory in multicore chips

Cache coherency

Directory-based cache coherence protocol

Snoopy cache coherence protocol

MESI cache coherence protocol

Cache-related performance issues

False sharing and the ping-pong effect

Processor affinity

Cache locking

Transactional ...