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The Trace CPU model plays back elastic traces, which are dependency and timing annotated traces generated by the Elastic Trace Probe attached to the O3 CPU model. The focus of the Trace CPU model is to achieve memory-system (cache-hierarchy, interconnects and main memory) performance exploration in a fast and reasonably accurate way instead of using the detailed but slow O3 CPU model.

The traces have been developed for single-threaded benchmarks simulating in both SE and FS mode. They have been correlated for 15 memory-sensitive SPEC 2006 benchmarks and a handful of HPC proxy apps by interfacing the Trace CPU with classic memory system and varying cache design parameters and DRAM memory type. In general, elastic traces can be ported to other simulation environments.

Etrace methodology.jpg