Explain the scheduler's placement decisions for a computation.

Runs the placement pass over the plan the same way collect(distributed = TRUE) would, and returns its decision table: one row per fusable source -> compute chain with the decision, the modelled costs (cost mode), and the reason. Placement depends on runtime resources, so pool widths are read from the live garry_daemons() pools when present; pass read / compute to ask "what would the pass do with this topology" without daemons running.

Usage

garry_explain_placement(
  x,
  read = NULL,
  compute = NULL,
  mode = garry_opt("placement")
)

Arguments

x

A LazyRaster, a named list of them (multi-export), or a Plan.

read, compute

Pool widths to assume; default = the live pools (0 when none are running).

mode

"rules" or "cost"; default garry_opt("placement").

Value

A data.frame with columns source, compute, bands, flops_px, move_mb, cost_fuse_s, cost_mat_s, decision, reason.

See also

garry_options(), garry_task_report()