Add grouped RaggedShard bucket layout#3407
Closed
weifengpy wants to merge 2 commits into
Closed
Conversation
meta-cla
Bot
added
the
CLA Signed
weifengpy
added a commit
that referenced
this pull request
Jun 3, 2026
Introduce an explicit bucket-level layout contract for placements that need grouped planning, and add GroupedRaggedShard with param-major gathered storage for view-in/view-out unshard. Tests: python -m pytest -q torchtitan/experiments/flex_shard/tests/test_flex_shard_ragged_shard.py; python -m pytest -q torchtitan/experiments/flex_shard/tests/test_flex_shard_buckets.py ghstack-source-id: 6336f93 Pull-Request: #3407
Contributor
Author
|
Squashed into #3239 via ghstack; the grouped RaggedShard layout now lands as part of that PR. |
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
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment
1 participant
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Outdated suggestions cannot be applied.This suggestion has been applied or marked resolved.Suggestions cannot be applied from pending reviews.Suggestions cannot be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.
Stack from ghstack (oldest at bottom):
Introduce an explicit bucket-level layout contract for placements that need grouped planning, and add GroupedRaggedShard with param-major gathered storage for view-in/view-out unshard.
Tests: python -m pytest -q torchtitan/experiments/flex_shard/tests/test_flex_shard_ragged_shard.py; python -m pytest -q torchtitan/experiments/flex_shard/tests/test_flex_shard_buckets.py