Search Results - "Bo Peng, Ivy"

Scaling the Ion Inertial Length and Its Implications for Modeling Reconnection in Global Simulations by Tóth, Gábor, Chen, Yuxi, Gombosi, Tamas I., Cassak, Paul, Markidis, Stefano, Peng, Ivy Bo

“…We investigate the use of artificially increased ion and electron kinetic scales in global plasma simulations. We argue that as long as the global and ion…”
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Global Three‐Dimensional Simulation of Earth's Dayside Reconnection Using a Two‐Way Coupled Magnetohydrodynamics With Embedded Particle‐in‐Cell Model: Initial Results by Chen, Yuxi, Tóth, Gábor, Cassak, Paul, Jia, Xianzhe, Gombosi, Tamas I., Slavin, James A., Markidis, Stefano, Peng, Ivy Bo, Jordanova, Vania K., Henderson, Michael G.

“…We perform a three‐dimensional (3‐D) global simulation of Earth's magnetosphere with kinetic reconnection physics to study the flux transfer events (FTEs) and…”
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MAGNETIC NULL POINTS IN KINETIC SIMULATIONS OF SPACE PLASMAS by Olshevsky, Vyacheslav, Deca, Jan, Divin, Andrey, Peng, Ivy Bo, Markidis, Stefano, Innocenti, Maria Elena, Cazzola, Emanuele, Lapenta, Giovanni

“…ABSTRACT We present a systematic attempt to study magnetic null points and the associated magnetic energy conversion in kinetic particle-in-cell simulations of…”
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Extended Magnetohydrodynamics with Embedded Particle-in-Cell Simulation of Ganymede's Magnetosphere by Toth, Gabor, Jia, Xianzhe, Markidis, Stefano, Peng, Ivy Bo, Chen, Yuxi, Daldorff, Lars K. S., Tenishev, Valeriy M., Borovikov, Dmitry, Haiducek, John D., Gombosi, Tamas I., Glocer, Alex, Dorelli, John C.

“…We have recently developed a new modeling capability to embed the implicit particle-in-cell (PIC) model iPIC3D into the…”
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Idle Period Propagation in Message-Passing Applications by Bo Peng, Ivy, Markidis, Stefano, Laure, Erwin, Kestor, Gokcen, Gioiosa, Roberto

“…Idle periods on different processes of Message Passing applications are unavoidable. While the origin of idle periods on a single process is well understood as…”
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Kub: Enabling Elastic HPC Workloads on Containerized Environments by Medeiros, Daniel, Wahlgren, Jacob, Schieffer, Gabin, Peng, Ivy

“…The conventional model of resource allocation in HPC systems is static. Thus, a job cannot leverage newly available resources in the system or release…”
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PIC simulations of wave-particle interactions with an initial electron velocity distribution from a kinetic ring current model by Yu, Yiqun, Delzanno, Gian Luca, Jordanova, Vania, Peng, Ivy Bo, Markidis, Stefano

“…Whistler wave-particle interactions play an important role in the Earth inner magnetospheric dynamics and have been the subject of numerous investigations. By…”
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MPI windows on storage for HPC applications by Rivas-Gomez, Sergio, Gioiosa, Roberto, Peng, Ivy Bo, Kestor, Gokcen, Narasimhamurthy, Sai, Laure, Erwin, Markidis, Stefano

“…•The use of MPI one-sided communication and MPI windows on storage is proposed.•The approach is based on the memory-mapped IO mechanism of the…”
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SAGE: Percipient Storage for Exascale Data Centric Computing by Narasimhamurthy, Sai, Danilov, Nikita, Wu, Sining, Umanesan, Ganesan, Markidis, Stefano, Rivas-Gomez, Sergio, Peng, Ivy Bo, Laure, Erwin, Pleiter, Dirk, Witt, Shaun de

“…•A storage system, termed “SAGE”, capable for handling extreme volumes of data suitable for Exascale supercomputers.•SAGE is driven by an object storage…”
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NVIDIA Tensor Core Programmability, Performance & Precision by Markidis, Stefano, Chien, Steven Wei Der, Laure, Erwin, Peng, Ivy Bo, Vetter, Jeffrey S.

“…The NVIDIA Volta GPU microarchitecture introduces a specialized unit, called Tensor Core that performs one matrix-multiply-and-accumulate on 4x4 matrices per…”
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Reconnection in the Martian Magnetotail: Hall‐MHD With Embedded Particle‐in‐Cell Simulations by Ma, Yingjuan, Russell, Christopher T., Toth, Gabor, Chen, Yuxi, Nagy, Andrew F., Harada, Yuki, McFadden, James, Halekas, Jasper S., Lillis, Rob, Connerney, John E. P., Espley, Jared, DiBraccio, Gina A., Markidis, Stefano, Peng, Ivy Bo, Fang, Xiaohua, Jakosky, Bruce M.

“…Mars Atmosphere and Volatile EvolutioN (MAVEN) mission observations show clear evidence of the occurrence of the magnetic reconnection process in the Martian…”
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Characterizing the performance benefit of hybrid memory system for HPC applications by Peng, Ivy Bo, Gioiosa, Roberto, Kestor, Gokcen, Vetter, Jeffrey S., Cicotti, Pietro, Laure, Erwin, Markidis, Stefano

“…•We perform memory-centric analysis of tested applications.•We quantify the performance impact of using different memory configurations (HBM-only, cache and…”
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Global three-dimensional simulation of Earth's dayside reconnection using a two-way coupled magnetohydrodynamics with embedded particle-in-cell model: initial results: 3D MHD-EPIC simulation of magnetosphere by Chen, Yuxi, Tóth, Gábor, Cassak, Paul, Jia, Xianzhe, Gombosi, Tamas I., Slavin, James A., Markidis, Stefano, Peng, Ivy Bo, Jordanova, Vania K., Henderson, Michael G.

“…Here, we perform a three-dimensional (3D) global simulation of Earth's magnetosphere with kinetic reconnection physics to study the flux transfer events (FTEs)…”
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The Cost of Synchronizing Imbalanced Processes in Message Passing Systems by Peng, Ivy Bo, Markidis, Stefano, Laure, Erwin

“…Synchronization in message passing systems is achieved by communication among processes. System and architectural noise and different workloads cause processes…”
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Preparing HPC Applications for the Exascale Era: A Decoupling Strategy by Peng, Ivy Bo, Gioiosa, Roberto, Kestor, Gokcen, Laure, Erwin, Markidis, Stefano

“…Production-quality parallel applications are often a mixture of diverse operations, such as computation- and communication-intensive, regular and irregular,…”
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Evaluation of Parallel Communication Models in Nekbone, a Nek5000 Mini-Application by Ivanov, Ilya, Jing Gong, Akhmetova, Dana, Peng, Ivy Bo, Markidis, Stefano, Laure, Erwin, Machado, Rui, Rahn, Mirko, Bartsch, Valeria, Hart, Alistair, Fischer, Paul

“…Nekbone is a proxy application of Nek5000, a scalable Computational Fluid Dynamics (CFD) code used for modelling incompressible flows. The Nekbone…”
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Idle waves in high-performance computing by Markidis, Stefano, Vencels, Juris, Peng, Ivy Bo, Akhmetova, Dana, Laure, Erwin, Henri, Pierre

“…The vast majority of parallel scientific applications distributes computation among processes that are in a busy state when computing and in an idle state when…”
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A Quantitative Approach for Adopting Disaggregated Memory in HPC Systems by Wahlgren, Jacob, Schieffer, Gabin, Gokhale, Maya, Peng, Ivy

“…Memory disaggregation has recently been adopted in data centers to improve resource utilization, motivated by cost and sustainability. Recent studies on…”
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On the Rise of AMD Matrix Cores: Performance, Power Efficiency, and Programmability by Schieffer, Gabin, De Medeiros, Daniel Araujo, Faj, Jennifer, Marathe, Aniruddha, Peng, Ivy

“…Matrix multiplication is a core computational part of deep learning and scientific workloads. The emergence of Matrix Cores in high-end AMD GPUs, a building…”
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Exploring the Performance Benefit of Hybrid Memory System on HPC Environments by Peng, Ivy Bo, Gioiosa, Roberto, Kestor, Gokcen, Cicotti, Pietro, Laure, Erwin, Markidis, Stefano

“…Hardware accelerators have become a de-facto standard to achieve high performance on current supercomputers and there are indications that this trend will…”
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