Steps to run the simulator
Installation of Champsim requires following the README.md under https://github.com/ChampSim/ChampSim/blob/master/README.md
Replace the installed branch folder under Champsim with the branch folder in this directory to include all the code additions made by our team.
In the file btb/basic_btb.cc change BTB_WAY = 2 on line 27.
Edit the configuration file under /ChampSim/champsim_config.json as
"branch_predictor": "gshare" or
"branch_predictor": "perceptron" or
"branch_predictor": "tage" or
"branch_predictor": "hybrid_pt" or
"branch_predictor": "hybrid_gp" or
"branch_predictor": "hybrid_tg"
Run the following commands
$ ./config.sh champsim_config.json
$ make
Optional step to save terminal output to file:
$ script gshare_602.txt
Download the following traces from https://dpc3.compas.cs.stonybrook.edu/champsim-traces/speccpu/
$ 602.gcc_s-2226B.champsimtrace.xz
$ 605.mcf_s-472B.champsimtrace.xz
$ 625.x264_s-18B.champsimtrace.xz
Add them under the Champsim folder.
Execute the binary directly.
$ bin/champsim --warmup_instructions 200000000 --simulation_instructions 500000000 602.gcc_s-2226B.champsimtrace.xz
$ bin/champsim --warmup_instructions 200000000 --simulation_instructions 500000000 605.mcf_s-472B.champsimtrace.xz
$ bin/champsim --warmup_instructions 200000000 --simulation_instructions 500000000 625.x264_s-18B.champsimtrace.xz
ChampSim gives results for Instructions per Cycle, MPKI, Prediction Accuracy and MPKI lost to various branch types.
There are some other useful metrics printed out at the end of simulation.
This folder also contains the output generated and saved from the terminal that were used by us in the report.