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2018 GTC San Jose
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S8805 - Managing Memory of Complex Aggregate Data Structures in OpenACC

Session Speakers
Session Description

It is extremely challenging to move data between host and device memories when deep nested complex aggregate data structures are commonly used in an application. This talk will bring users diving into VASP, ICON, and other real-world applications and see how the deep copy issue is solved in these real-world applications with PGI compiler and OpenACC APIs. The OpenACC 2.6 specification includes directives and rules that enable programmer-controlled manual deep copy, albeit in a form that can be intrusive in terms of the number of directives required. The OpenACC committee is designing new directives to extend explicit data management to aggregate data structures in a form that is more elegant and concise. The talk will also cover comparison of unified memory, manual deepcopy, full deepcopy, and true deepcopy.


Additional Information
Performance Optimization, Programming Languages
Software
Intermediate technical
Talk
25 minutes
Session Schedule