Reexamining anomaly temporal behaviors in SPEC CPU workloads: self-similar or not?
This paper studies the correlation of memory accesses in high-performance computer systems from a time dependence perspective, and concludes that correlations in memory access-arrival times are inconsistent, either with little correlation or with evident and abundant correlations. Thus neither independent identically distributed or self-similar is appropriate to characterize all memory activities. For memory workload with evident correlations, we present both pictorial and statistical evidence that memory accesses have self-similar like behavior. In addition, we implement a memory access series generator in which the inputs are the measured properties of the available trace data. Experimental results show that this model can accurately emulate the complex access arrival behaviors in both workloads with little and strong correlations, particularly for the burstiness characteristics in the memory workloads.
self-similar memory workloads burstiness correlation study gaussian