Abstract
Intel’s Knights Landing processor (KNL) is the latest product in the Xeon Phi product line. As a self-hosted system it is the first commercially available many-core architecture which can run unmodified applications. This makes KNL a very interesting option for HPC centers which have to support many different applications including community and ISV codes, where code changes are hard or impossible. Of course running any application and running any application efficiently is not the same, so it remains to investigate how efficient KNL is in executing unmodified codes from x86 servers.
In this work we will investigate the Knights Landing architecture with a focus on its ability to run OpenMP applications efficiently. Kernel benchmarks are used to investigate basic characteristics like memory latency and bandwidth. Furthermore, application-like benchmarks like the NAS parallel benchmarks or SPEC OpenMP benchmarks are used as well as real applications from RWTH Aachen University. The performance is compared to a 2-socket Broadwell system. We consider this a fair comparison as both architectures are state-of-the-art today and both roughly cost the same amount of money and consume the same amount of energy.
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Schmidl, D., Wang, B., Müller, M.S. (2017). Assessing the Performance of OpenMP Programs on the Knights Landing Architecture. In: de Supinski, B., Olivier, S., Terboven, C., Chapman, B., Müller, M. (eds) Scaling OpenMP for Exascale Performance and Portability. IWOMP 2017. Lecture Notes in Computer Science(), vol 10468. Springer, Cham. https://doi.org/10.1007/978-3-319-65578-9_20
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