I am reading the documentation on multi-GPU and multi-stack programming, specifically Work scheduling and distribution . According to this, the partitioning of work-groups to stacks (in the composite mode) follows a simple rule:
... the slowest moving dimension is divided in number-of-stacks chunks and distributed round-robin between stacks ...
For SYCL, the slowest moving dimension is the first element of global range.
I cannot understand what is meant by "first element of global range", even tough numerical examples are given:
For example, for global range {38,512,512} with local range {2,1,8} the driver would partition the y-dimension, while for local range {1,1,16} the driver would partition the z-dimension.
Could anybody give me some hints to understand what the slowest dimension is in this context?
