This document provides instructions to create a GAP Benchmarks 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 here: http://dist.gem5.org/images/x86/ubuntu-18-04/gapbs.
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/1.4.3/packer_1.4.3_linux_amd64.zip # (if packer is not already installed) unzip packer_1.4.3_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.
gem5 scripts which configure the system and run the simulation are available in configs/. The main script run_gapbs.py expects following arguments:
--kernel : path to the Linux kernel. GAPBS has been tested with vmlinux-5.2.3.
--disk : Path to the disk image.
--cpu_type : Cpu model (kvm, atomic, simple, o3).
--num_cpus : Number of cpu cores.
--mem_sys : Memory model (classic, MI_example, MESI_Two_Level).
--benchmark : The graph workload (cc, bc, bfs, tc, pr, sssp).
--synthetic : Type of graph (if synthetic graph 1, if real world graph 0)
--graph : Size of graph (if synthetic then number of nodes, else name of the graph )
Example usage:
build/X86/gem5.opt configs/run_gapbs.py --kernel [path to the linux kernel] --disk [path to the disk image] --cpu-type kvm --num_cpus 1 --mem_sys classic --benchmark cc --synthetic 1 --graph 20