Notes on how agglomeration works in MLMG #4602
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WeiqunZhang
reviewed
Aug 7, 2025
| boxes. Two advantages of using this option is that the bottom solver will become | ||
| smaller, and communication overhead is reduced. | ||
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| - :cpp:`LPInfo::setAgglomerationGridSize(int)` (by default 8 in 1D, 16 in 2D, 32 in 3D) |
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If it's a GPU build, it's 32 be default. If it's a CPU build, it's 32 in 1D, 16 in 2D and 8 in 3D. (The order in the original commit is incorrect.)
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Summary
Notes on how agglomeration works in MLMG
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The proposed changes: