Initialising ...
Initialising ...
Initialising ...
Initialising ...
Initialising ...
Initialising ...
Initialising ...
Abe, Takato*; Sato, Takuto; Boku, Taisuke*; Fujita, Norihisa*; Kusaka, Hiroyuki*
Joho Shori Gakkai Kenkyu Hokoku, p.1 - 11, 2025/05
no abstracts in English
Tsujita, Yuichi*; Arima, Tatsumi*; Idemitsu, Kazuya*; Suzuki, Yoshio; Kimura, Hideo
Joho Shori Gakkai Kenkyu Hokoku 2008-ARC-177, 2008-HPC-114, p.103 - 108, 2008/03
Recently, many research works for Pu-recycle have been done. We proposed a molecular dynamics method to have deep understandings in nuclear materials. We adopted a parallel computing technique by using an ITBL's computing environment in our simulation program because a huge amount of computations and time steps is required. We received a request from application users to incorporate a user friendly interface in a computing environment for specifying parameters in a simulation program and successive operations of parallel computation and visualization on a user's terminal. So, we have built a GUI computing environment to realize such the functionalities by using an ITBL's client API. In this paper, we report objectives of this development, implementation method of this application, and examples of the computing environment. Finally, we mention its future plan.
Imamura, Toshiyuki*; Yamada, Susumu; Machida, Masahiko
Joho Shori Gakkai Kenkyu Hokoku 2007-HPC-111, p.167 - 172, 2007/08
no abstracts in English
Tsujita, Yuichi; Yamagishi, Nobuhiro*; Kimura, Kazuyuki*; Otani, Takayuki; Tsuruoka, Nobuhiko*; Fujita, Naoyuki*
Joho Shori Gakkai Kenkyu Hokoku 2002-HPC-92, p.7 - 12, 2002/10
SCore system has been developed to provide flat computing infrastructure for parallel computing without awareness of each compute host in a PC cluster system. An SCore cluster system can be handled as a single computer. MPICH-SCore, which is an MPI library in SCore, is not available across multiple SCore cluster systems as well as multiple platforms. We have implemented an MPI communication library, Stampi in SCore cluster system to enable MPI communication between SCore cluster systems and measured communication performance of the library using SCore cluster systems.
Itakura, Kenichi; Yokokawa, Mitsuo; Shimizu, Futoshi; Kimizuka, Hajime*; Kaburaki, Hideo
Joho Shori Gakkai Kenkyu Hokoku 2001-HPC-88, p.67 - 72, 2001/10
he Earth Simulator which is under development has 640 processor nodes and its peak performance is 40 Tflop/s. In this study, we have evaluated performance of solid molecular dynamics simulation on an SMP node of the Earth Simulator. In molecular dynamics simulation, each particle is influenced by all particles within a cut-off region and the representation of these pairs of particles is made by a matrix. Two matrix representations, compressed row form and jagged diagonal form, are considered for vectorization. The jagged diagonal form is better than the compressed row form in performance on a vector processor for the force calculation of every pairs, because the vector length of the former is longer than that of the latter. However, computational cost for converting the normal matrix form to the jagged diagonal form is quite expensive and the total performance in using the jagged diagonal form is low. Speedup by parallelization with the compressed row form is 2.4 to 2.7 with 8 vector processors.
Uehara, Hitoshi; Tsuda, Yoshinori*; Yokokawa, Mitsuo
Joho Shori Gakkai Kenkyu Hokoku 2001-HPC-87, 2001(77), p.67 - 72, 2001/07
MPI is one of major message communication interfaces for application programs. The MPI consists of an MPI-1 as a basic specification, and an MPI-2 as extensions.Some benchmark program for MPI-1 had been proposed already. However benchmark programs for MPI-2 are a little and their measurements are limited. We have developed an MPI benchmark program library for MPI-2 (MBL2) which measures the detail performance of MPI-I/O and RMA functions of MPI-2. In this report, we describe the MBL2 and performance data of MPI-2 on VPP5000, which we measured using MBL2.
Imamura, Toshiyuki; Muramatsu, Kazuhiro; Kitabata, Hideyuki*; Kaneko, Isamu*; Yamagishi, Nobuhiro*; Hasegawa, Yukihiro*; Takemiya, Hiroshi*; Hirayama, Toshio
Joho Shori Gakkai Kenkyu Hokoku 2001-ARC-142, p.49 - 54, 2001/03
no abstracts in English
Tsujita, Yuichi; Imamura, Toshiyuki; Takemiya, Hiroshi*; Yamagishi, Nobuhiro*
Joho Shori Gakkai Kenkyu Hokoku 2000-HPC-84, p.43 - 48, 2000/12
no abstracts in English
Yokokawa, Mitsuo; ; Hagiwara, Takashi*; Isobe, Yoko*; ; ; Tani, Keiji;
Joho Shori Gakkai Kenkyu Hokoku, 99(21), p.55 - 60, 1999/00
no abstracts in English
Takemiya, Hiroshi*; Imamura, Toshiyuki; ; ; Higuchi, Kenji;
Joho Shori Gakkai Kenkyu Hokoku HPC-67-17, 67(17), p.97 - 102, 1997/00
no abstracts in English
; ; ; ; ; ; ; Yokokawa, Mitsuo;
Joho Shori Gakkai Kenkyu Hokoku, 96(81), p.129 - 134, 1996/08
no abstracts in English
Joho Shori Gakkai Kenkyu Hokoku, 96(82), p.1 - 6, 1996/08
no abstracts in English
Imamura, Toshiyuki
Joho Shori Gakkai Kenkyu Hokoku, 96(81), p.13 - 18, 1996/08
no abstracts in English
Muramatsu, Kazuhiro; Takei, Toshifumi*; Matsumoto, H.*; Doi, Shun*
Joho Shori Gakkai Kenkyu Hokoku, 96(50), p.27 - 32, 1996/05
no abstracts in English
Yokokawa, Mitsuo;
Joho Shori Gakkai Kenkyu Hokoku, 93(33), p.37 - 44, 1993/04
no abstracts in English
; Minami, Kazuyoshi*; ; Masukawa, Fumihiro; Naito, Yoshitaka
Joho Shori Gakkai Kenkyu Hokoku, 91(61), p.25 - 32, 1991/07
no abstracts in English
Watanabe, Kenji*; ; Yokokawa, Mitsuo; ;
Joho Shori Gakkai Kenkyu Hokoku, 91(61), p.17 - 24, 1991/07
no abstracts in English
