理化学研究所 計算科学研究センター

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第171回 第2部

第171回 第2部
日時: 2019年6月11日(火)、14:40 - 15:05
場所: R-CCS 6階講堂

・講演題目: Meeting the performance challenges of spiking network simulations on general purpose computers
・講演者: Jari Pronold (PhD student, The Jülich Research Centre, Germany)
※発表・スライド共に英語

講演要旨: 詳細を見る

Today’s extremely scalable simulation technology for spiking neuronal networks enables the representation of models of more than a billion of neurons and their connections using the entire K computer. However, the runtimes of the largest possible simulations carried out so far were too long to allow for observations of the network dynamics over long periods of time, and also small to medium-scale simulations typically run in far more than real-time. The performance challenges for spiking neuronal network simulators such as NEST on general purpose computers arise from the inherent sparse but broad connectivity between neurons and from the unpredictable neuronal spiking activity. In distributed simulations of spiking networks, this requires frequent communication of spike data, and on each compute node routing of the incoming spikes to the local targets. This entails irregular memory access and hence constitutes a major performance bottleneck, which is a problem that I will address in my talk. I will present recent developments in simulation technology that aim at meeting such performance challenges.