PREDICTION OF EXASCALE COMPUTER SUBSYSTEM PARAMETERS
Yu. G. Bartenev, Yu. A. Bondarenko, V. F. Spiridonov
VANT. Ser.: Mat. Mod. Fiz. Proc 2012. Вып.3. С. 15-23.
Results of the analysis of relationships between parameters of exascale computer subsystems are reported. As a computing algorithm model we used explicit difference schemes for 3D gas dynamics problems. Assuming that the runtime of each problem in the entire computing field is the same, formulas for the growth of the interconnect bandwidth as a whole, memory size and memory speed at all tiers and performance of the graphics subsystem were obtained depending on the increase in the number of computing nodes (servers) and their performance for transition from an existing computer to a designed supercomputer. Application of these formulas enables balanced design of computers using performance parameters of existing computers, if their subsystem parameters are balanced. The results predicted by the formulas are shown to be close to the 2018 exascale computer performance predictions made by J. Dongarra. Methods and factors that in some sense simplify the design of such computers are described.Keywords: supercomputer, computer parameters, computer scaling, interconnect bandwidth, speed and size of main and external storage, speed of graphics processing system, 3D non-steady-state problems, explicit difference schemes.
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