Notes on how agglomeration works in MLMG #4602
Open
Conversation
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
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. | ||
|
|
||
| - :cpp:`LPInfo::setAgglomerationGridSize(int)` (by default 8 in 1D, 16 in 2D, 32 in 3D) |
There was a problem hiding this comment.
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.)
There was a problem hiding this comment.
@ajnonaka -- do you want to go ahead and fix this PR then we can merge?
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment
Add this suggestion to a batch that can be applied as a single commit.
This suggestion is invalid because no changes were made to the code.
Suggestions cannot be applied while the pull request is closed.
Suggestions cannot be applied while viewing a subset of changes.
Only one suggestion per line can be applied in a batch.
Add this suggestion to a batch that can be applied as a single commit.
Applying suggestions on deleted lines is not supported.
You must change the existing code in this line in order to create a valid suggestion.
Outdated suggestions cannot be applied.
This suggestion has been applied or marked resolved.
Suggestions cannot be applied from pending reviews.
Suggestions cannot be applied on multi-line comments.
Suggestions cannot be applied while the pull request is queued to merge.
Suggestion cannot be applied right now. Please check back later.
Summary
Notes on how agglomeration works in MLMG
Additional background
Checklist
The proposed changes: