dac 2012

www.kit.edu

Simplify: an abstract MPSoC platform framework for enabling fast functional/behavioral simulation

Gabriel Marchesan Almeida, Oliver Bellaver Longhi, Michael Hübner, Fabiano Hessel and Jürgen Becker

Institut für Technik der Informationsverarbeitung (ITIV)2 11.04.2023 Dr. Michael Hübner

Motivation

Multiprocessor Systems-on-Chips (MPSoCs): popular solution that combines flexibility of software along with potentially significant speedups;

They integrate few mid-range microprocessors for which applications are usually statically mapped at design-time;

Those applications however tend to increase in complexity and often exhibit time-changing workloads which makes mapping decisions sub-optimal in a number of scenarios;

Offline approaches are no longer sufficient as application mapping paradigms, because they do not allow coping with time changing workloads;


FlexTiles project (Tool-Flow Overview)

FP7 – FPT ICT – 288248

Virtu

alisation

Layer

Kern

el

Reso

urce M

on

itorin

g

& A

llocatio

n

Tile

Tile

Tile

Tile

Tile

Tile

Virtu

al C

od

e g

eneratio

n

Virtu

al B

itstream

gen

eration

Co

mp

ilation

VH

DL

S

ynth

esisP

&R

Parallelisatio

n

Ap

plicatio

n

Reco

nfig

urab

le area

Tool Flow Virtualisation Layers Manycore

Context


DYNAMIC VOLTAGE AND FREQUENCY SCALING

ARCHITECTURE LEVEL

SYSTEM LEVEL

DYNAMIC MAPPING

TASK MIGRATION

ADAPTATION

An adaptive system is an open system that is able to fit its changing according to changes in its environment or in parts of the system itself

ADAPT AS FAST AS POSSIBLE

IMPROVE OVERALLPERFORMANCE

Definitions


Multiprocessor System-on-Chip Architecture

PE

PE PE PE

PE PE

PE PE PE

PROCESSOR

FREQUENCY SCALING

RAM

RouterNoC

NETWORK PROCESSING UNIT (NPU)

R

R R R

R R

R R R

RTOS

TASK1

TASK2

TASKN

RAM

PE

R

PE

R

PE

R

PE

R

PE

R

PE

R

PE MIPS

PE µ-Blaze

PE ARM

PE openRISC


Simplify - FW

Version 1.0 Processors:

MIPS;

µ-Blaze;

ARM7;

openRISC;

Interconnect:Bus;

No OS Support;

Mono task – 1 application per processor;

No communication API for applications;

Web framework:Architecture Modeling;

Processing Element Configuration;

Application Description;

Application Compilation and Execution;

Execution Reports;

Automatic Generation of OVP* Platforms;

* OVP (Open Virtual Platform)

Version 2.0 OS support:

Round-robin scheduler;

Semaphores;

Mutexes;

Multi-task;

Communication API for applications;

Web framework:New design;

Improved Performance;

Code optimization;


Simplify - FW

http://simplify.itiv.kit.edu/simplify/wordpress/pub/simplify-FW.swf


Experiments

OVPsim Performance for Different Applications


Experiments

N CORES MIPS PER CORE SIM. TIME (s) SIM. INSTR.

4 210.60 4.62 3,892,315,516

8 107.40 9.07 7,792,631,032

16 53.60 18.14 15,585,262,071

32 27.00 36.04 31,170,524,129

64 13.50 72.08 62,341,048,257

Scalability of OVPsim Inside Simplify Framework


Conclusions

Simplify - FW is an OVP front-end which enables:Easy modeling of MPSoCs architectures;

Fast functional/behavioral simulation;

On-line design, simulation, and debug;

Off-line simulation and debug;

Embedded Operating System debugging;

Functional test of embedded applications;

Give it and try:

http://simplify.itiv.kit.edu

http://simplify.itiv.kit.edu/


Thank you for your [email protected]

Give it and try! http://simplify.itiv.kit.edu

http://simplify.itiv.kit.edu/

dac 2012

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