tailieunhanh - High Performance Computing on Vector Systems-P5

High Performance Computing on Vector Systems-P5: In March 2005 about 40 scientists from Europe, Japan and the US came together the second time to discuss ways to achieve sustained performance on supercomputers in the range of Teraflops. The workshop held at the High Performance Computing Center Stuttgart (HLRS) was the second of this kind. The first one had been held in May 2004. | The Role of Supercomputing in Industrial Combustion Modeling 115 parameter sweep. The control block is the program object which allows the changing of the sequence of execution operation according to a specified criterion. Figure 2 shows an example of task flow. After execution of Task block block and block are activated simultaneously. In each of these blocks a process is executed. After having worked with the first set of data in block the first process in block is activated. After execution of the first process in block the first process in block and the second process in block are started according to the logic of the experiment. The input data for the second and the following processes in block are prepared in block and so on. Data Flow Level Figure 3 presents an example of a solver block Block . At this level the user can describe the manipulation of data in a very fine grained way. The solver block consists of computation C replacement R parameterization P modules and a database. These are connected to each other with arrowed lines showing the direction of data transfer between modules and the sequence of execution during the computation process. Each module is a Java object which has a standard structure and consists of several sections. For example each computation module C consists of four sections. The first section organizes the preparation of input data. The second generates the job and controls its execution. The third initializes and controls the record of the result in the experiment database. The fourth section controls the execution of module operation. It also informs the main program of the block about the manipulation of certain sets of data and when execution within a block is complete. After a block is started the parameterization module P and replacement module R wait for the request from the corresponding inputs of the computation module C . After that they generate a set of input data .

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