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Test KernelAbstractions launches by their behavior, not the launch kind - #582

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maleadt merged 1 commit into
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tb/ka-fold-launch-tests
Oct 23, 2026
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maleadt merged 1 commit into
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tb/ka-fold-launch-tests

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@maleadt

@maleadt maleadt commented Oct 23, 2026 •

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The launch configuration tests asserted which kind of launch KernelAbstractions picks for a few shapes. That choice is KernelAbstractions' policy, not something the back end controls, and the assertions break whenever it changes: JuliaGPU/KernelAbstractions.jl#919 launches 4-d ranges on the N-d grid, which fails them on every back end.

This keeps the checks of what the back end does affect: that a dynamic 3-d range is indexed without divisions, and that iteration spaces too large for 32-bit indices are indexed correctly. The latter now covers a 4-d range that is launched on the N-d grid with JuliaGPU/KernelAbstractions.jl#919, and one that is only large along its last dimension.

The tests pass with KernelAbstractions main and with JuliaGPU/KernelAbstractions.jl#919, so this can be merged first.

The launch configuration tests asserted which kind of launch
KernelAbstractions picks for a few shapes. That is KernelAbstractions'
policy, not something the back end controls, and the assertions break
whenever it changes (JuliaGPU/KernelAbstractions.jl#912 launches 4-d
ranges on the N-d grid).

Keep the checks of what the back end does affect: that a dynamic 3-d
range is indexed without divisions, and that iteration spaces too large
for 32-bit indices are indexed correctly, now also one that is only
large along its last dimension.
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codecov Bot commented Oct 23, 2026

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Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 89.30%. Comparing base (0739da8) to head (06d6119).

Additional details and impacted files
@@           Coverage Diff           @@
##             main     #582   +/-   ##
=======================================
  Coverage   89.30%   89.30%           
=======================================
  Files          18       18           
  Lines        1748     1748           
=======================================
  Hits         1561     1561           
  Misses        187      187           

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@maleadt
maleadt merged commit 6ae75fd into main Oct 23, 2026
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@maleadt
maleadt deleted the tb/ka-fold-launch-tests branch October 23, 2026 20:03
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