The DEGIMA (DEstination for Gpu Intensive MAchine) is a high performance

computer cluster A computer cluster is a set of computers that work together so that they can be viewed as a single system. Unlike grid computers, computer clusters have each node set to perform the same task, controlled and scheduled by software. The newes ...

used for hierarchical

N-body simulation In physics and astronomy, an ''N''-body simulation is a simulation of a dynamical system of particles, usually under the influence of physical forces, such as gravity (see n-body problem, ''n''-body problem for other applications). ''N''-body ...

s at the Nagasaki Advanced Computing Center,

Nagasaki University is a national university of Japan. Its nickname is ''Chōdai'' (). The main campus is located in Bunkyo-machi, Nagasaki City, Nagasaki Prefecture, Japan. History Nagasaki University was established in 1949 by incorporating several nation ...

. The system consists of a 144-node cluster of PCs connected via an

InfiniBand InfiniBand (IB) is a computer networking communications standard used in high-performance computing that features very high throughput and very low latency. It is used for data interconnect both among and within computers. InfiniBand is also used ...

interconnect. Each node is composed of 2.66 GHz

Intel Core i7 Intel Core is a line of multi-core (with the exception of Core Solo and Core 2 Solo) central processing units (CPUs) for midrange, embedded, workstation, high-end and enthusiast computer markets marketed by Intel Corporation. These processors ...

920 processor, two GeForce GTX295 graphics cards, 12 GB DDR3-1333 memory and

Mellanox Mellanox Technologies Ltd. () was an Israeli-American multinational supplier of computer networking products based on InfiniBand and Ethernet technology. Mellanox offered adapters, switches, software, cables and silicon for markets including high ...

MHES14-XTC SDR InfiniBand host adapter on MSI X58 pro-E motherboard. Each graphics card has two GT200 GPU chips. As a whole, the system has 144

CPU A central processing unit (CPU), also called a central processor, main processor, or just processor, is the primary processor in a given computer. Its electronic circuitry executes instructions of a computer program, such as arithmetic, log ...

s and 576

GPU A graphics processing unit (GPU) is a specialized electronic circuit designed for digital image processing and to accelerate computer graphics, being present either as a discrete video card or embedded on motherboards, mobile phones, personal ...

s. It runs astrophysical

s with over 3,000,000,000 particles using the Multiple-Walk parallel treecode. The system is noted for being highly cost and energy-efficient, having a peak performance of 111

TFLOPS Floating point operations per second (FLOPS, flops or flop/s) is a measure of computer performance in computing, useful in fields of scientific computations that require floating-point calculations. For such cases, it is a more accurate measur ...

with an

energy efficiency Energy efficiency may refer to: * Energy efficiency (physics), the ratio between the useful output and input of an energy conversion process ** Electrical efficiency, useful power output per electrical power consumed ** Mechanical efficiency, a rat ...

of 1376 MFLOPS/watt. The overall cost of the hardware was approximately US$500,000.Hamada T., Nitadori K. (2010) 190 TFlops astrophysical N-body simulation on a cluster of GPUs. In ''Proceedings of the 2010 ACM/IEEE International Conference for High Performance Computing, Networking, Storage and Analysis'' (SC '10). IEEE Computer Society, Washington, DC, USA, 1-9. The name of the system is also derived from the name of a small artificial island called "

Dejima or Deshima, in the 17th century also called , was an artificial island off Nagasaki, Japan, that served as a trading post for the Portuguese (1570–1639) and subsequently the Dutch (1641–1858). For 220 years, it was the central con ...

" in

Nagasaki , officially , is the capital and the largest Cities of Japan, city of Nagasaki Prefecture on the island of Kyushu in Japan. Founded by the Portuguese, the port of Portuguese_Nagasaki, Nagasaki became the sole Nanban trade, port used for tr ...

References

X86 supercomputers MSI supercomputers {{super-compu-stub

See also

References