Interval Simulation: Raising the Level of Abstraction in Architectural Simulation
Davy Genbrugge, Stijn Eyerman and Lieven Eeckhout
Published at the 16th International Symposium on High Performance Computer Architecture (HPCA-16), 2010
Abstract
Detailed architectural simulators suffer from a long development cycle and extremely long evaluation times. This longstanding problem is further exacerbated in the multicore processor era. Existing solutions address the simulation problem by either sampling the simulated instruction stream or by mapping the simulation models on FPGAs; these approaches achieve substantial simulation speedups while simulating performance in a cycle-accurate manner.
Interval simulation raises the level of abstraction and replaces the core-level cycleaccurate simulation model by a mechanistic analytical model. The analytical model estimates core-level performance by analyzing intervals, or the timing between two miss events (branch mispredictions and TLB/cache misses); the miss events are determined through simulation of the memory hierarchy, cache coherence protocol, interconnection network and branch predictor. By raising the level of abstraction, interval simulation reduces both development time and evaluation time.
