DArray/stencil: Allocate HaloArray outside spawn_datadeps#703
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jpsamaroo wants to merge 3 commits into
Open
DArray/stencil: Allocate HaloArray outside spawn_datadeps#703jpsamaroo wants to merge 3 commits into
jpsamaroo wants to merge 3 commits into
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This PR changes the stencil code to allocate
HaloArrayobjects outside of thespawn_datadepsregion, allowing Datadeps to properly parallelize stencil tasks accessing them (no more serial dependency because ofUnknownAliasing). This appears to improve performance by about 3x on a 512x512 benchmark with 8 threads, which is pretty nice! I expect that improvement to scale as we increase threads as well.This PR also caches and reuses allocated
HaloArrayobjects on the same task (caching byDArrayand per-chunk-index), netting another 2x performance benefit.Written by Claude Sonnet