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/develop/images/x86/ubuntu-18-04/gapbs.img.gz.
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 scripts which configure the system and run the simulation are available in configs/. The main script run_gapbs.py expects following arguments:
kernel : A manditory positional argument. The path to the Linux kernel. GAPBS has been tested with vmlinux-5.2.3. See src/linux-kernel for information on building a linux kernel for gem5.
disk : A manditory positional argument. The path to the disk image.
cpu_type : A manditory positional argument. The cpu model (kvm, atomic, simple, o3).
num_cpus : A manditory positional argument. The number of cpu cores.
mem_sys : A manditory positional argument. The memory model (classic, MI_example, or MESI_Two_Level).
benchmark : A manditory positional argument. The graph workload (cc, bc, bfs, tc, pr, sssp).
synthetic : A manditory positional argument. The graph type. If synthetic graph then 1, otherwise 0 for a real world graph.
graph : A manditory positional argument. If synthetic, then the size of the graph. Otherwise the name of graph to execute.
Example usage:
<gem5 X86 binary> configs/run_gapbs.py <kernel> <disk> <cpu_type> <num_cpus> <mem_sys> <benchmark> <synthetic> <graph>
Working status of these tests for gem5-20 can be found here.