NDLI: MUSA: a multi-level simulation approach for next-generation HPC machines

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MUSA: a multi-level simulation approach for next-generation HPC machines

Content Provider	ACM Digital Library
Author	Rico, Alejandro Ayguadé, Eduard Labarta, Jesus Casas, Marc Allande, César Grass, Thomas Valero, Mateo Armejach, Adrià Moreto, Miquel
Abstract	The complexity of High Performance Computing (HPC) systems is increasing in the number of components and their heterogeneity. Interactions between software and hardware involve many different aspects which are typically not transparent to scientific programmers and system architects. Therefore, predicting the behavior of current scientific applications on future HPC infrastructures is a challenging task. In this paper we present MUSA, an end-to-end methodology that employs a multi-level simulation infrastructure. By combining different levels of abstraction, MUSA is able to model the communication network, microarchitectural details and system software interactions, providing different trade-offs in terms of simulation cost and accuracy. We compare detailed MUSA simulations with native executions of up to 2,048 cores and find relative errors that are within 10% in the common case. In addition, we use MUSA to simulate up to 16,384 cores and successfully identify scalability bottlenecks due to different factors, e.g. memory contention or load imbalance. We also compare different system configurations, showing how MUSA can help system designers to assess the usefulness of future technologies in next-generation HPC machines.
Starting Page	1
Ending Page	12
Page Count	12
File Format	PDF
ISBN	9781467388153
Language	English
Publisher	Association for Computing Machinery (ACM)
Publisher Date	2016-11-13
Access Restriction	Subscribed
Content Type	Text
Resource Type	Article

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