Ptolemy II (UC Berkeley)

Graphical entry of models

Components are ‘actors’Actors designed in Java

Ptolemy II Graphical Model CreationPtolemy II Graphical Model Creation

ACME Actor Generator

SoC Generation Tool FlowSoC Generation Tool Flow

2x2 Mesh Interconnect Network2x2 Mesh Interconnect Network

Xilinx Platform Studio SystemXilinx Platform Studio System

Processor Based Actors

Design complex components

Example: Switch arbiters

Describe functionality in C

Use Java Native Interface with Ptolemy II

2x2 Mesh Interconnect Network2x2 Mesh Interconnect Network

ACME actor library ACME actor library mirrors Ptolemy’s mirrors Ptolemy’s

Java libraryJava library

Xilinx library contains IP Xilinx library contains IP blocks and board blocks and board

descriptionsdescriptions

Emulate caches and interconnect in Emulate caches and interconnect in FPGA fabricFPGA fabric

Leave remaining components in Leave remaining components in softwaresoftware

ACME

Emulate systems using FPGAs

System emulation

Rapid SoC prototyping

Hardware design

Logic Containing

VHDL Actors

Microblaze

Processor

Systems

Serial Port

for PC Communication

Actor Generator GUIActor Generator GUI

Extend Ptolemy II GUI for Extend Ptolemy II GUI for graphical actor creationgraphical actor creation

Generate skeleton code for actorGenerate skeleton code for actor

ACME Actor GeneratorACME Actor Generator

Network

Switch

Processing Node

Automated Modeling and Emulation of Interconnect Automated Modeling and Emulation of Interconnect Designs for Many-Core Chip MultiprocessorsDesigns for Many-Core Chip Multiprocessors

Colin J. Ihrig, Rami Melhem, and Alex K. JonesColin J. Ihrig, Rami Melhem, and Alex K. Jones

University of PittsburghUniversity of Pittsburgh

Email: cji3@pitt.edu, melhem@cs.pitt.edu, akjones@ece.pitt.eduEmail: cji3@pitt.edu, melhem@cs.pitt.edu, akjones@ece.pitt.edu

Emulation AugmentationEmulation Augmentation

User specified latency and User specified latency and throughput circuitthroughput circuit

Processor / hardware synchronization Processor / hardware synchronization via a hardware barrier circuitvia a hardware barrier circuit

Three cycle throughput

One additional latency cycleProcessors

set / reset barrier

Barrier clocks custom logic

Problem

Architectures moving towards many cores

Need to study new architectures

Software simulators do not scale well

System design is time consuming