Methodology.md

Documentation on the methodology work for DRAM cache experiments

This is not a very detailed or formal document, but tries to at least point to the relevant links or paths and important notes.

• DRAM cache component is part of the stdlib in this repo ("src/python/gem5/components/memory/dcache.py").
• Octopi-cache is a three level MESI cache hiearchy

gem5 scripts used to take checkpoints

• NPB D Class: Octopi-cache/riscv-2channel-1ccd-checkpoint-timing.py

• NPB C Class: ctopi-cache/riscv-2channel-1ccd-checkpoint-timing.py

• GAPBS (2^25 vertices): Octopi-cache/riscv-2channel-1ccd-checkpoint-timing-gapbs.py

Bash scripts used (will show the directory where the checkpoints and results are)

• NPB: npb_checkpoint.sh and npb_checkpoint_c_class.sh
• GAPBS: gapbs_checkpoint.sh

The gem5 directory I have been using is here: /home/aakahlow/Dcache_Src/dramCacheController. D Class and GAPBS checkpoints will go there. The C class checkpoints will be stored in /projects (exact path in the npb_checkpoint_c_class.sh script).

Looppoint stuff

• The branch with O3 loop point analysis stuff: https://github.com/darchr/gem5/commits/looppointAnalysis-Ayaz
• example.py script in the above branch is a modified version of Zhantong's example script to use looppoint analysis probe and print most recent PC + count.