Building and Auto-Tuning Computing Kernels: Experimenting with Boast and Starpu in the Gysela CodeJulien Bigot, Virginie Grandgirard, Guillaume Latu, Jean-Francois Mehaut, Luís Felipe Millani, Chantal Passeron, Steven Quinito Masnada, Jérôme Richard and Brice VideauESAIM: ProcS, 63 (2018) 152-178DOI: https://doi.org/10.1051/proc/201863152