GRAPE-4: a teraFLOPS massively parallel special-purpose computer system for astrophysical N-body simulations

2002 ◽  
Author(s):  
M. Taiji ◽  
J. Makino ◽  
T. Ebisuzaki ◽  
D. Sugimoto
Keyword(s):  
Computer System ◽  
Massively Parallel ◽  
Purpose Computer ◽  
Special Purpose Computer

scholarly journals Grape-4: A Teraflops Machine for N-Body Simulations

1996 ◽  
Vol 174 ◽  
pp. 141-150 ◽  
Author(s):  
Makoto Taiji ◽  
Junichiro Makino ◽  
Toshiyuki Fukushige ◽  
Toshikazu Ebisuzaki ◽  
Daiichiro Sugimoto
Keyword(s):  
Computer System ◽  
High Accuracy ◽  
Massively Parallel ◽  
Stellar Systems ◽  
Gravitational Forces ◽  
The Individual ◽  
Peak Speed ◽  
Purpose Computer ◽  
Special Purpose Computer

We have developed a massively parallel special-purpose computer system for N-body simulations, GRAPE-4 (GRAvity-PipE 4). The GRAPE-4 system is designed for high-accuracy simulations of dense stellar systems. The GRAPE-4 calculates gravitational forces, their derivatives in time and potential energies. It has a hardware for prediction of positions and velocities, which is used for the individual timestep scheme. Using multi-chip module technology, we integrated 1692 chips of 640 megaflops performance. The peak speed of GRAPE-4 is 1.08 teraflops.

scholarly journals Grape-4: A Teraflops Machine for N-Body Simulations

1998 ◽  
Vol 11 (2) ◽  
pp. 600-602
Author(s):  
Makoto Taiji
Keyword(s):  
Computer System ◽  
High Accuracy ◽  
Massively Parallel ◽  
Stellar Systems ◽  
Gravitational Forces ◽  
The Individual ◽  
Peak Speed ◽  
Purpose Computer ◽  
Special Purpose Computer

Abstract.We have developed a massively parallel special-purpose computer system for N-body simulations, GRAPE-4 (GRAvity-PipE 4). The GRAPE-4 system is designed for high-accuracy simulations of dense stellar systems. The GRAPE-4 calculates gravitational forces, their derivatives in time and potential energies. It has a hardware for prediction of positions and velocities, which is used for the individual timestep scheme. We integrated 1692 chips of 640 megaflops performance to achieve the peak speed of 1.08 teraflops.

scholarly journals MDGRAPE-4: a special-purpose computer system for molecular dynamics simulations

2014 ◽  
Vol 372 (2021) ◽  
pp. 20130387 ◽  
Author(s):  
Itta Ohmura ◽  
Gentaro Morimoto ◽  
Yousuke Ohno ◽  
Aki Hasegawa ◽  
Makoto Taiji
Keyword(s):  
Molecular Dynamics ◽  
Molecular Dynamics Simulations ◽  
Computer System ◽  
Three Dimensional ◽  
Md Simulations ◽  
Particle Simulation ◽  
Peak Performance ◽  
Dynamics Simulations ◽  
Purpose Computer ◽  
Special Purpose Computer

We are developing the MDGRAPE-4, a special-purpose computer system for molecular dynamics (MD) simulations. MDGRAPE-4 is designed to achieve strong scalability for protein MD simulations through the integration of general-purpose cores, dedicated pipelines, memory banks and network interfaces (NIFs) to create a system on chip (SoC). Each SoC has 64 dedicated pipelines that are used for non-bonded force calculations and run at 0.8 GHz. Additionally, it has 65 Tensilica Xtensa LX cores with single-precision floating-point units that are used for other calculations and run at 0.6 GHz. At peak performance levels, each SoC can evaluate 51.2 G interactions per second. It also has 1.8 MB of embedded shared memory banks and six network units with a peak bandwidth of 7.2 GB s −1 for the three-dimensional torus network. The system consists of 512 (8×8×8) SoCs in total, which are mounted on 64 node modules with eight SoCs. The optical transmitters/receivers are used for internode communication. The expected maximum power consumption is 50 kW. While MDGRAPE-4 software has still been improved, we plan to run MD simulations on MDGRAPE-4 in 2014. The MDGRAPE-4 system will enable long-time molecular dynamics simulations of small systems. It is also useful for multiscale molecular simulations where the particle simulation parts often become bottlenecks.

scholarly journals Special purpose computer system for flow visualization using holography technology

2008 ◽  
Vol 16 (11) ◽  
pp. 7686 ◽  
Author(s):  
Yukio Abe ◽  
Nobuyuki Masuda ◽  
Hideaki Wakabayashi ◽  
Yuta Kazo ◽  
Tomoyoshi Ito ◽  
...  
Keyword(s):  
Flow Visualization ◽  
Computer System ◽  
Purpose Computer ◽  
Special Purpose Computer

scholarly journals GRAPE-6: Massively-Parallel Special-Purpose Computer for Astrophysical Particle Simulations

2003 ◽  
Vol 55 (6) ◽  
pp. 1163-1187 ◽  
Author(s):  
Junichiro Makino ◽  
Toshiyuki Fukushige ◽  
Masaki Koga ◽  
Ken Namura
Keyword(s):  
Massively Parallel ◽  
Particle Simulations ◽  
Purpose Computer ◽  
Special Purpose Computer

Special purpose computer system for Ising models

1988 ◽  
Vol 59 (11) ◽  
pp. 2483-2487 ◽  
Author(s):  
Makoto Taiji ◽  
Nobuyasu Ito ◽  
Masuo Suzuki
Keyword(s):  
Computer System ◽  
Ising Models ◽  
Purpose Computer ◽  
Special Purpose Computer
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