The drcachesim tool was designed to be extensible, allowing users to easily model different caching devices, implement different models, and gather custom statistics.

To model different caching devices, subclass the simulator_t, caching_device_t, caching_device_block_t, caching_device_stats_t classes.

To implement a different cache model, subclass the cache_t class and override the request(), access_update(), and/or replace_which_way() method(s).

Statistics gathering is separated out into the caching_device_stats_t class. To implement custom statistics, subclass caching_device_stats_t and override the access(), child_access(), flush(), and/or print_stats() methods.