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As the class of datacenters recently coined as warehouse scale computers (WSCs) continues to leverage commodity multicore processors with increasing core counts, there is a growing need to consolidate various workloads on these machines to fully utilize their computation power. However, it is well known that when multiple applications are co-located on a multicore machine, contention for shared memory resources can cause severe cross-core performance interference. To ensure that the quality of service (QoS) of user-facing applications does not suffer from performance interference, WSC operators resort to disallowing co-location of latency-sensitive applications with other applications. This policy translates to low machine utilization and millions of dollars wasted in WSCs.
Tang et al. (Sat,) studied this question.