SMT at the Universities of Washington and San Diego - Instruction fetching schemes
The ICOUNT policy proved as superior!
The ICOUNT.2.8 fetching strategy reached a IPC of about 5.4 (the RR.2.8 reached about 4.2 only).
Most interesting is that neither mispredicted branches nor blocking due to cache misses, but a mix of both and perhaps some other effects showed as the best fetching strategy.
Recently, simultaneous multithreading has been evaluated with
- database workloads,
- and multimedia workloads.
Both achieving roughly a 3-fold IPC increase with an eight-threaded SMT over a single-threaded superscalar with similar resources.