This document provides instructions to create a GAP Benchmark Suite (GAPBS) disk image, which, along with provided configuration scripts, may be used to run GAPBS within gem5 simulations.

A pre-build disk image, for X86, can be found, gzipped, here: http://dist.gem5.org/dist/v21-1/images/x86/ubuntu-18-04/gapbs.img.gz.

Building the Disk Image

Assuming that you are in the src/gapbs/ directory, first create m5 (which is needed to create the disk image):

git clone https://gem5.googlesource.com/public/gem5
cd gem5/util/m5
scons build/x86/out/m5

To create the disk image you need to add the packer binary in the disk-image directory:

cd disk-image/
wget https://releases.hashicorp.com/packer/1.6.0/packer_1.6.0_linux_amd64.zip   # (if packer is not already installed)
unzip packer_1.6.0_linux_amd64.zip # (if packer is not already installed)
./packer validate gapbs/gapbs.json
./packer build gapbs/gapbs.json

After this process succeeds, the disk image can be found on the src/gapbs/disk-image/gapbs-image/gapbs.

GAPBS disk image can support both real and synthetic graph inputs. The current pre-build disk image contains only one graph input which includes the New York city road map (with 733K nodes) it can be found: http://users.diag.uniroma1.it/challenge9/download.shtml.

To use other graphs simply copy the graph in the gapbs/ directory and add them to gapbs/gapbs.json.

gem5 Configuration Scripts

gem5 scripts which configure the system and run the simulation are available in configs/. The main script run_gapbs.py expects following arguments:

Example usage:

<gem5 X86 binary> configs/run_gapbs.py <kernel> <disk> <cpu_type> <num_cpus> <mem_sys> <benchmark> <synthetic> <graph>

Working Status

Working status of these tests for gem5-20 can be found here.