Software technologies for homogenous computing environment

Homogeneous computing environment (HCE) it's special-purpose computer systems, which are represents as the mesh-connected identical processing elements (PE), each of which is configured to perform arithmetic or logic functions and certain kind connections with the "neighboring" PE. HCE programming is a PE array set-up process for the implementation of data processing and transmission algorithm. The main result of programming is "laying" algorithm graphs on lattice of PE. To date, numerous projects dedicated to applying of general-purpose vectorizing compilers for adaptation the common programming languages to systems with massively parallel data processing have not been any success with respect to the parallel programs of any kind. At the same time, some of new languages for parallel programming are not getting noticeable proliferation, indicating that the limited capacity of traditional methods for systems programming of massively parallel computing. The results of numerous researches show that the one of key factor for the efficiency of parallel programming is a radical change of the concept of variable and assignment procedures. That is why the platform of software for parallel data processing based on imperative programming languages, are forced to adopt the basic principles of declarative programming concepts. As examples of such language implementation the FPGA-coprocessor software based on a hybrid language Mitrion-C programming and parallel computing platform based on a declarative language SquenceL are described in article. Analysis of the current status and trends of software techniques for massively parallel computing allows define the basic requirements for the structure and functions of the components of the software platform of HCE. The main components of such a platform are programming system and the subsystem of code layout. The programming system should be based on the declarative language and provide debugging on syntactic and semantic levels and accuracy control. The layout system should be based on the modular principle in order to ensure the iterative adaptation of the object code for optimizes the building boot code and the possibility of further development of the system. In case of HCE both time (data streams computation on PE arrays) and space (rectangular matrix locally connected PE) metric of computations are taking place. It is causes the "geometric" nature of the operation of the compiler. It must take into account the possible propagation path data streams in two-dimensional space of PE and optimize the lengths of these "trajectories". This fact fundamentally distinguishes the principles of construction and functioning of compilers for HCE and usual parallel computer systems.

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