ABSTRACT
Computer simulations are essential to elucidate natural phenomena such as global circulation of atmosphere, and to analyze artificial structures such as automobiles and buildings. The performance of supercomputers has been increased; however, it is still insufficient to generate precise and accurate high-resolutions of simulations. The objectives of the project are to develop the most advanced and high performance supercomputer system in the world and to develop and deploy its usage technologies including development of application software for various computational sciences. The newly developed Tofu network, which is a six-dimensional mesh/torus network, is implemented in the K computer for data communication among the compute nodes. The K computer employs a three-level parallel programming model to attain highly sustainable performance. To allow use of a large number of K computer cores effectively, users were required to achieve a certain sustained performance for their applications.
