Abstract
Heterogeneous architectures have become increasingly common. From co-packaging small and large cores, to GPUs alongside CPUs, to general-purpose heterogeneous-ISA architectures with cores implementing different ISAs. As diversity of execution cores grows, predictive models become of paramount importance for scheduling and resource allocation. In this paper, we investigate the capabilities of performance predictors in a heterogeneous-ISA setting, as well as the predictors’ effects on scheduler quality. We follow an unbiased feature selection methodology to identify the optimal set of features for this task, instead of pre-selecting features before training. Finally, we incorporate our findings in ML-based schedulers and evaluate their sensitivity to the underlying system’s level of heterogeneity. We show our schedulers to perform within 2–11% of an oracular scheduler across a variety of underlying heterogeneous-ISA multicore systems without modification.
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Acknowledgments
The authors would like to thank the anonymous reviewers for their helpful insights. This research was supported in part by NSF Grant CNS-1652925, NSF/Intel Foundational Microarchitecture Research Grant CCF-1823444, and a gift from Huawei.
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Prodromou, A., Venkat, A., Tullsen, D.M. (2019). Platform-Agnostic Learning-Based Scheduling. In: Pnevmatikatos, D., Pelcat, M., Jung, M. (eds) Embedded Computer Systems: Architectures, Modeling, and Simulation. SAMOS 2019. Lecture Notes in Computer Science(), vol 11733. Springer, Cham. https://doi.org/10.1007/978-3-030-27562-4_10
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DOI: https://doi.org/10.1007/978-3-030-27562-4_10
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