# Paper notes Iben prefetchers

## Analysis and Optimization of the Memory Hierarchy for Graph Processing Workloads
- Heterogeneous reuse distances of different data types lead to intensive DRAM accesses to retrieve structure and property data. Property data are the vertex data array accesses
- Low MLP due to load-load dependency chains, limiting the possibility of overlapping DRAM accesses.

### Droplet
- Consists of 2 different HW prefetchers
- The first one at the L2 cache, according to the simulations, the private L2 cache does not make the performance a lot better, since the reuse distance is too big. So it only brings structure data that is smaller so the reuse distance can be bigger to be effective.
- The seconde one at the Memory Controller level