Inner Parallelism

NODES offers a mechanism to parallelize inner runtime code using OmpSs-2 without having to pass through the compiler. Below we list the main features of this mechanism:

• It is enabled through the runtime.enable_inner_parallelism configure variable.
• At the moment, only specific parts of the taskiter code leverage its potential.
• InnerParallelism::taskLoop allows parallelizing an inner loop within the NODES runtime as-is.
• InnerParallelism::taskWait allows to synchronize the internally created tasks up until that point.
• Task synchronization falls entirely upon the developer, as the implicit taskwait in programs will not enforce their finalization.