Evaluation of microarchitectures: challenges and metrics
Leonel Sousa,
R – INESC-ID Lisboa –
Abstract:
The midlifekicker metric is presented, mainly for evaluating microarchitectures mostly during the design process. We assume a microarchitecture designed at a time T-1 and estimate if a new microarchitecture projected for time T has really advantages over the microarchitecture designed at T-1 and remapped on the same technology at time T. We consider that microarchitects minimize the product cycles per instruction (CPI) x cycle time and estimate performance based on CPI with a “soft-threshold” to include cycle time product effects. Experimental results are presented for different IA-32 based processors. For the considered microarchitectures, it is shown that the performance has not been significantly improved in the last few years.
Date: 2005-Sep-14 Time: 11:00:00 Room: INESC-ID, Room 425
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