Article

Article title APPLICATION OF DIRECT MEMORY ACCESS TO THE ORGANIZATION OF INFORMATION EXCHANGE
Authors V.F. Bezzubov, Yu.N. Muzelin, S.M. Alexankov, D.V. Demidov
Section SECTION I. PRINCIPLES OF CONSTRUCTION, ARCHITECTURE AND HARDWARE BASE SUPERCOMPUTERS
Month, Year 12, 2014 @en
Index UDC 681. 327. 62
DOI
Abstract The article considers the use of a purely internal communication method of exchange – direct memory access (DMA) for organizing the data exchange between the individual memory blocks of computing modules included in the computer system. It is accomplished a comparison of data exchange in small (local) systems between computing modules included in the computer system individual memory blocks using the intercomputer (inter-process) method, direct memory access method, and RDMA method developed by RDMA consortium and based on the direct memory access in a networked computer system structure. It is shown that the use of RDMA Consortium technology to organize the exchange in two-machine computer systems, as well as in small (local) systems is the cause of extra time on software processing of network protocols in the organization of mode of operation and RDMA channel. It is shown that, in accordance with the principle of import substitution, for the organization of high-speed information exchange in embedded (small) computer systems the most effective is to use the national data exchange method – intercomputer direct memory access implementing pipelined data transfer in comparison with the RDMA Consortium technology. In addition, the use of intercomputer (double) DMA a failed processor increases computer system survivability due to the reconfiguration of the complex’s structure on the basis of the units keeping a performance and the calculation result obtained before the fault.

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Keywords Safety; reliability; availability; excessiveness; excess; readiness; maintainability; repairability; fail-safe feature; resiliency.
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