Applications programmers do not need to write explicitly parallel programs
Moderator: Professor Arvind, MIT
For the motion: Professor David August,
Against the motion: Professor Keshav Pingali,
Arvindís position statement
Microprocessors with small
number of cores have become ubiquitous. The number of cores in a
microprocessor may track
Please bring your own darts.
Keshav Pingali's position statement:
†I believe explicitly parallel programming is a necessary evil for applications programmers. It is true that explicitly parallel programs are more complex to write, debug and maintain than implicitly parallel programs (in which parallelism is managed automatically by compilers, runtime systems and systems software). Nevertheless, I will argue that there are applications that cannot be parallelized at compile-time or runtime by automatic techniques; for these types of applications, programmers must write explicitly parallel code if they want good performance on multicore processors. I will also present quantitative arguments to show that it is important to permit applications programmers to express non-deterministic choice, and that a speculative model is essential for exploiting parallelism in many programs.
David August's position statement:
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