A Variant of Concurrent Constraint Programming on GPU

Pierre Talbot, Frederic Pinel, Pascal Bouvry
Interdisciplinary Centre for Security, Reliability and Trust (SnT), University of Luxembourg, Esch-sur-Alzette L-4243, Luxembourg
36th AAAI Conference on Artificial Intelligence (AAAI 2022), 2022


   title={A Variant of Concurrent Constraint Programming on GPU},

   author={Talbot, Pierre and Pinel, Fr{‘e}d{‘e}ric and Bouvry, Pascal},



The number of cores on graphical computing units (GPUs) is reaching thousands nowadays, whereas the clock speed of processors stagnates. Unfortunately, constraint programming solvers do not take advantage yet of GPU parallelism. One reason is that constraint solvers were primarily designed within the mental frame of sequential computation. To solve this issue, we take a step back and contribute to a simple, intrinsically parallel, lock-free and formally correct programming language based on concurrent constraint programming. We then re-examine parallel constraint solving on GPUs within this formalism, and develop TURBO, a simple constraint solver entirely programmed on GPUs. TURBO validates the correctness of our approach and compares positively to a parallel CPU-based solver.
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