[Gems-users] How to get L1 miss statistics for SNUCA

[Monobrata Debnath <mono0908@xxxxxxxxx>]

Hello gems Group:


I have been running gems for a while.Initially I could not have managed to print any L1 miss statistics. What I had is given below:

  1D_cache cache stats: 
  L1D_cache_total_misses: 0


  L1D_cache_total_demand_misses: 0
  L1D_cache_total_prefetches: 0
  L1D_cache_total_sw_prefetches: 0
  L1D_cache_total_hw_prefetches: 0
  L1D_cache_misses_per_transaction: 0
  L1D_cache_misses_per_instruction: 0


  L1D_cache_instructions_per_misses: NaN


Then I reset the "REMOVE_SINGLE_CYCLE_DCACHE_FAST_PATH"  flag to false. Now I have miss rate data for both L1D and L1I caches.


However it is mentioned in gems documentation wiki /CMP-NUCA for SNUCA "REMOVE_SINGLE_CYCLE_DCACHE_FAST_PATH" must be set to true. Please let me know , if there is any easy way to get  the statistics for L1 cache miss/hit choosing SNUCA as cache design without altering ruby's code.


Also if the g_cache_design is CMP_TOKEN , what kind of cache design for this category?  from the available information I can say CMP_token is a cache cohrency protocol.

Any advise is deeply appreciated


Thanks,
Monobrata