Design of a Flexible In Situ Framework with a Temporal Buffer for Data Processing and Visualization of Time-Varying Datasets

  • Kenji OnoEmail author
  • Jorji Nonaka
  • Hiroyuki Yoshikawa
  • Takeshi Nanri
  • Yoshiyuki Morie
  • Tomohiro Kawanabe
  • Fumiyoshi Shoji
Conference paper
Part of the Lecture Notes in Computer Science book series (LNCS, volume 11203)


This paper presents an in situ framework focused on time-varying simulations, and uses a novel temporal buffer for storing simulation results sampled at user-defined intervals. This framework has been designed to provide flexible data processing and visualization capabilities in modern HPC operational environments composed of powerful front-end systems, for pre-and post-processing purposes, along with traditional back-end HPC systems. The temporal buffer is implemented using the functionalities provided by Open Address Space (OpAS) library, which enables asynchronous one-sided communication from outside processes to any exposed memory region on the simulator side. This buffer can store time-varying simulation results, and can be processed via in situ approaches with different proximities. We present a prototype of our framework, and code integration process with a target simulation code. The proposed in situ framework utilizes separate files to describe the initialization and execution codes, which are in the form of Python scripts. This framework also enables the runtime modification of these Python-based files, thus providing greater flexibility to the users, not only for data processing, such as visualization and analysis, but also for the simulation steering.


Temporal buffer Time-varying data Heterogeneous architecture 



This research has used the computational resources of the K computer at RIKEN Center for Computational Science (R-CCS) in Kobe, Japan. This work is partially supported by the “Joint Usage/Research Center for Interdisciplinary Large-scale Information Infrastructures” in Japan (Project ID: jh180060-NAH), and also by the Japanese Ministry of Education, Culture, Sports, Science and Technology (MEXT) as a social and scientific priority issue (Development of Innovative Design and Production Processes that Lead the Way for the Manufacturing Industry in the Near Future) to be tackled by using the post-K supercomputer.


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Copyright information

© Springer Nature Switzerland AG 2018

Authors and Affiliations

  1. 1.Research Institute for Information TechnologyKyushu UniversityFukuokaJapan
  2. 2.RIKEN Center for Computational ScienceKobeJapan
  3. 3.Fujitsu LimitedTokyoJapan

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