Output-stationary (OS)
Beginner
A way of running a grid of calculators where each cell keeps its own running total and both kinds of input flow past it.
Novice
A dataflow in which each processing element owns one output and accumulates it in place while activations and weights stream in. Partial sums never move until the output is finished.
Expert
Minimizes partial-sum traffic and keeps the wide accumulator local; both narrow operands must be streamed, and a new output tile means re-reading the other operand. Eyeriss distinguishes several variants by which outputs are computed together.
Explained in Systolic arrays (Architectures).
See also: Weight-stationary (WS), Partial sum.