Follow these steps to get DRAMSys as part of gem5

1. Go to ext/dramsys (this directory)
2. Clone DRAMSys: 'git clone --recursive git@github.com:tukl-msd/DRAMSys.git DRAMSys'
3. Change directory to DRAMSys: 'cd DRAMSys'
4. Checkout the correct commit: 'git checkout -b gem5 09f6dcbb91351e6ee7cadfc7bc8b29d97625db8f'

If you wish to run a simulation using the gem5 processor cores, make sure to enable the storage mode in DRAMSys.
This is done by setting the value of the "StoreMode" key to "Store" in the base configuration file.
Those configuration file can be found in 'DRAMSys/library/resources/configs/simulator'.