Models, Mindsets, Meta: The What, the How, and the Why Not? by Tiziana Margaria & Susanne Graf & Kim G. Larsen

Author:Tiziana Margaria & Susanne Graf & Kim G. Larsen
Language: eng
Format: epub
ISBN: 9783030223489
Publisher: Springer International Publishing

Arguably, send-receive allows a more accurate performance model than collective operations do. Examples of well-suited models for finding efficient implementations are LogP and LogGP [19]. However, these models are overly detailed and difficult for an application programmer to use, as demonstrated by a comparison with batch-oriented models [2, 13].

Reality: Collective operations contribute to the challenging goal of predicting program characteristics during the design process, i.e. without actually running the program on a machine. The use of send-receive obviously makes the program’s performance much less predictable. Furthermore, the predictablity of collective operations greatly simplifies the modelling task at the application level, as compared with models like LogP.

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