TSS: Applying Two-Stage Sampling in Micro-Architecture Simulations

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Provided by: Huazhong University of Science & Technology
Topic: Hardware
Format: PDF
Accelerating micro-architecture simulation is becoming increasingly urgent as the complexity of workload and simulated processor increases. This paper presents a novel Two-Stage Sampling (TSS) scheme to accelerate the sampling-based simulation. It firstly selects some large samples from a dynamic instruction stream as candidates of detail simulation and then samples some small groups from each selected first stage sample to do detail simulation. Since the distribution of standard deviation of Cycle Per Instruction (CPI) is insensitive to micro-architecture, TSS could be used to speedup design space exploration by splitting the sampling process into two stages, which is able to remove redundant instruction samples from detail simulation when the program is in stable program phase (standard deviation of CPI is near zero).
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