Meaning of DMM_MEMORY_TILE_SIZE

[CPA872]

Hi, I was wondering what is the meaning of DMM_MEMORY_TILE_SIZE_N and DMM_MEMORY_TILE_SIZE_M parameters.

Additionally, how will these parameters affect the performance? For example, in the given default parameters, -DMM_PARALLELISM_N=32 -DMM_PARALLELISM_M=8 -DMM_MEMORY_TILE_SIZE_N=512 -DMM_MEMORY_TILE_SIZE_M=512, Does reducing MEMORY_TILE_SIZES to 256 affect performance? If so, in what way?

Thanks in advance.

[definelicht]

Hi there, there's an in-depth description of the parameters in the paper. The memory tile sizes indirectly affect the performance in at least two ways:

• If there are too few tiles, the double buffering strategy will not be able to feed enough new data for the next tile before the previous tile has been computed.
• A smaller memory tile will require more memory bandwidth, so eventually this can become a memory bottleneck.