David Eberius David Böhme Olga Pearce Did the GPU obfuscate the load imbalance in my MPI simulation? 20-29 2021 HiPar@SC https://doi.org/10.1109/HiPar54615.2021.00008 conf/sc/2021hipar db/conf/sc/hipar2021.html#EberiusBP21