GPU Models

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AMD's Compute-GPU Model

GCN3 Based Simulation

The GCN3 ISA is supported in AMD's public pre-release gem5 repo on the branch agutierr/master-gcn3-staging.

Cloning the repository

To clone the repo with GCN3 support use the following command:

git clone -b agutierr/master-gcn3-staging

Building the simulator with GPU and GCN3 support

Currently, the GPU model only works with X86 and the VIPER protocol, which you can read about in the slides from AMD's 2018 ISCA tutorial. To build gem5 with a GCN3-based GPU model included use the following command:

scons -sQ -jN ./build/GCN3_X86/gem5.opt

ISCA 2018 Tutorial

A tutorial was held on June 2nd, 2018, in conjuction with the 45th International Symposium on Computer Architecture (ISCA). Our presentation can be found here: The AMD gem5 APU Simulator: Modeling GPUs Using the Machine ISA.

HSAIL Based Simulation

MICRO-48 Tutoral

A tutorial was held in conjunction with MICRO-48. We have made the slides available from our 2015 tutorial titled: The AMD gem5 APU Simulator: Modeling Heterogeneous Systems in gem5.

Emualted CL Runtime

OpenCL Compiler

CLOC is used to compile OpenCL kernels for use with gem5's GPU compute model. The most recent revision of CLOC that is known to work with gem5 is:

commit cf777856cfce86d11ea97c245992971159b85a4d

ARM's NoMali GPU Model

The NoMali GPU model models the interface used by ARM Mali GPUs. The model does not render or compute anything, but can be used to fake a GPU. This enables Android and ChromeOS experiments without software rendering which would otherwise make simulation results extremely misleading. It was presented in the 2015 gem5 User Workshop.

Getting started instructions are currently available for Android 4.4 (KitKat).