HCW 2023 Keynote Heterogeneity and the Problem that Shall Not Be Named.

Heterogeneity is clearly increasing, especially as “accelerators” burrow deeper and deeper into different parts of an architecture. What is new, however, is a rapid change in not only the number of such heterogeneous cores, but in their characteristics, such as ISA or memory architecture. This talk is focused on the problem of how to construct efficient programs that combine multiple heterogeneous concurrent threads. We focus on the need today to invoke significant software stacks to cross any of these new boundaries. A suggestion is made of using migrating threads as the glue.