SCHEDULE: NOV 10-16, 2012
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GRAPE-8 - An Accelerator for Gravitational N-Body Simulation with 20.5GFLOPS/W Performance
SESSION: New Computer Systems
EVENT TYPE: Papers
TIME: 4:00PM - 4:30PM
SESSION CHAIR: Jeffrey Vetter
AUTHOR(S):Junichiro Makino, Hiroshi Daisaka
ROOM:255-BC
ABSTRACT:
In this paper, we describe the design and performance of GRAPE-8
accelerator processor for gravitational N-body simulations. It is
designed to evaluate gravitational interaction with cutoff between
particles. The cutoff function is useful for schemes like TreePM or
Particle-Particle Particle-Tree, in which gravitational force is
divided to short-range and long-range components. A single GRAPE-8
processor chip integrates 48 pipeline processors. The effective number
of floating-point operations per interaction is around 40. Thus the
peak performance of a single GRAPE-8 processor chip is 480 Gflops. A
GRAPE-8 processor card houses two GRAPE-8 chips and one FPGA chip for
PCI-Express interface. The total power consumption of the board is
46W. Thus, theoretical peak performance per wattage is 20.5 Gflops/W.
The effective performance of the total system, including the host
computer, is around 5Gflops/W. This is more than a factor of two
higher than the highest number in the current Green500 list.
Chair/Author Details:
Jeffrey Vetter (Chair) - Oak Ridge National Laboratory and Georgia Tech
Junichiro Makino - Tokyo Institute of Technology
Hiroshi Daisaka - Hitotsubashi University
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GRAPE-8 - An Accelerator for Gravitational N-Body Simulation with 20.5GFLOPS/W Performance
SESSION: New Computer Systems
EVENT TYPE:
TIME: 4:00PM - 4:30PM
SESSION CHAIR: Jeffrey Vetter
AUTHOR(S):Junichiro Makino, Hiroshi Daisaka
ROOM:255-BC
ABSTRACT:
In this paper, we describe the design and performance of GRAPE-8
accelerator processor for gravitational N-body simulations. It is
designed to evaluate gravitational interaction with cutoff between
particles. The cutoff function is useful for schemes like TreePM or
Particle-Particle Particle-Tree, in which gravitational force is
divided to short-range and long-range components. A single GRAPE-8
processor chip integrates 48 pipeline processors. The effective number
of floating-point operations per interaction is around 40. Thus the
peak performance of a single GRAPE-8 processor chip is 480 Gflops. A
GRAPE-8 processor card houses two GRAPE-8 chips and one FPGA chip for
PCI-Express interface. The total power consumption of the board is
46W. Thus, theoretical peak performance per wattage is 20.5 Gflops/W.
The effective performance of the total system, including the host
computer, is around 5Gflops/W. This is more than a factor of two
higher than the highest number in the current Green500 list.
Chair/Author Details:
Jeffrey Vetter (Chair) - Oak Ridge National Laboratory and Georgia Tech
Junichiro Makino - Tokyo Institute of Technology
Hiroshi Daisaka - Hitotsubashi University
Click here to download .ics calendar file