NumaMMA: NUMA MeMory Analyzer

François Trahay 1, 2 Manuel Selva 3 Lionel Morel 4 Kevin Marquet 5, 6
2 ACMES-SAMOVAR - Algorithmes, Composants, Modèles Et Services pour l'informatique répartie
SAMOVAR - Services répartis, Architectures, MOdélisation, Validation, Administration des Réseaux
3 CORSE - Compiler Optimization and Run-time Systems
Inria Grenoble - Rhône-Alpes, LIG - Laboratoire d'Informatique de Grenoble
5 SOCRATE - Software and Cognitive radio for telecommunications
Inria Grenoble - Rhône-Alpes, CITI - CITI Centre of Innovation in Telecommunications and Integration of services
Abstract : Non Uniform Memory Access (NUMA) architectures are nowadays common for running High-Performance Computing (HPC) applications. In such architectures, several distinct physical memories are assembled to create a single shared memory. Nevertheless, because there are several physical memories, access times to these memories are not uniform depending on the location of the core performing the memory request and on the location of the target memory. Hence, threads and data placement are crucial to efficiently exploit such architectures. To help in taking decision about this placement, profiling tools are needed. In this work, we propose NUMA MeMory Ana-lyzer (NumaMMA), a new profiling tool for understanding the memory access patterns of HPC applications. NumaMMA combines efficient collection of memory traces using hardware mechanisms with original visualization means allowing to see how memory access patterns evolve over time. The information reported by NumaMMA allows to understand the nature of these access patterns inside each object allocated by the application. We show how NumaMMA can help understanding the memory patterns of several HPC applications in order to optimize them and get speedups up to 28% over the standard non optimized version.
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Contributor : Lionel Morel <>
Submitted on : Friday, December 14, 2018 - 4:14:43 PM
Last modification on : Tuesday, June 11, 2019 - 11:15:37 AM
Long-term archiving on : Friday, March 15, 2019 - 5:18:38 PM


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François Trahay, Manuel Selva, Lionel Morel, Kevin Marquet. NumaMMA: NUMA MeMory Analyzer. ICPP 2018 - 47th International Conference on Parallel Processing, Aug 2018, Eugene, United States. pp.1-10, ⟨10.1145/3225058.3225094⟩. ⟨cea-01854072v2⟩



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