Tesis doctoral de Joan Manel Parcerisa Bundó
The objective of this thesis is to propose new techniques to design efficient clustered superscalar microarchitectures. Clustered microarchitectures partition the layout of several critical hardware components as a means to keep most of the parallelism while improving the scalability. A clustered processor core, made up of several low complex blocks or clusters, can efficiently execute chains of dependent instructions without paying the overheads of a long issue, register read or bypass latencies. Of course, when two dependent instructions execute in different clusters, an inter-cluster communication penalty is incurred. Moreover, distributed structures usually imply lower dynamic power requirements, and simplify power management via techniques such a selective clock/power gating and voltage scaling. the first target of this research is the assignment of instructions to clusters, since it plays a major role on performance, with the goals of keeping the workload of clusters balanced and reducing the penalty of critical communications. Two different approaches are proposed: first, a family of new schemes that dynamically identify groups of data-dependent instructions called slices, and make cluster assignments on a per-slice basis. The proposed schemes differ from previous approaches either because they are dynamic and/or because they include new mechanisms to deal explicitly with workload balance information gathered at runtime. Second, it proposes a family of new dynamic schemes that assign instructions to clusters in a per-instruction basis, based on prior assignment of the source register producers, on the cluster location of the source physical registers, and on the workload of clusters. the second contribution proposes value prediction as a means to mitigate the penalties of wire delays and, in particular, to hide inter-cluster communications while also improving workload balance. First, it is proven that the benefit of breaking de
Datos académicos de la tesis doctoral «Design of clustered superscalar microarchitectures«
- Título de la tesis: Design of clustered superscalar microarchitectures
- Autor: Joan Manel Parcerisa Bundó
- Universidad: Politécnica de catalunya
- Fecha de lectura de la tesis: 17/06/2004
Dirección y tribunal
- Director de la tesis
- Antonio Gonzalez Colas
- Tribunal
- Presidente del tribunal: emilio Lopez zapata
- Ana María Ripoll aracil (vocal)
- michael Tullsen dean (vocal)
- n Patt yale (vocal)