Skip to content

build fa2 from source for base image with torch2.6 and cu124#2867

Merged
winglian merged 3 commits into
mainfrom
fa2-build
Jul 5, 2025
Merged

build fa2 from source for base image with torch2.6 and cu124#2867
winglian merged 3 commits into
mainfrom
fa2-build

Conversation

@winglian
Copy link
Copy Markdown
Collaborator

@winglian winglian commented Jul 5, 2025

fa2 builds are broken when using torch 2.6.0 + cu124. let's build it from source on these base images

Summary by CodeRabbit

  • Chores
    • Improved Docker image build process to conditionally install the flash-attn package for specific PyTorch and CUDA versions.
    • Updated workflow triggers to include additional Dockerfile for automated testing on code changes.

@coderabbitai
Copy link
Copy Markdown
Contributor

coderabbitai Bot commented Jul 5, 2025

Warning

Rate limit exceeded

@winglian has exceeded the limit for the number of commits or files that can be reviewed per hour. Please wait 28 minutes and 33 seconds before requesting another review.

⌛ How to resolve this issue?

After the wait time has elapsed, a review can be triggered using the @coderabbitai review command as a PR comment. Alternatively, push new commits to this PR.

We recommend that you space out your commits to avoid hitting the rate limit.

🚦 How do rate limits work?

CodeRabbit enforces hourly rate limits for each developer per organization.

Our paid plans have higher rate limits than the trial, open-source and free plans. In all cases, we re-allow further reviews after a brief timeout.

Please see our FAQ for further information.

📥 Commits

Reviewing files that changed from the base of the PR and between 3ec7cf6 and 92b78e4.

📒 Files selected for processing (2)
  • .github/workflows/base.yml (1 hunks)
  • docker/Dockerfile-base (1 hunks)

Walkthrough

A conditional installation step for the flash-attn Python package was added to the Dockerfile, triggered only when building with PyTorch version 2.6.0 and CUDA 12.4. The installation is forced from source using an environment variable during the pip install process. The GitHub Actions workflow was updated to trigger on changes to Dockerfile-uv-base.

Changes

File(s) Change Summary
docker/Dockerfile-base Added a conditional RUN command to install flash-attn==2.8.0.post2 for specific PyTorch and CUDA versions.
.github/workflows/base.yml Added Dockerfile-uv-base to workflow trigger paths for push and pull_request events on the main branch.

Sequence Diagram(s)

sequenceDiagram
    participant BuildProcess
    participant Dockerfile
    participant pip

    BuildProcess->>Dockerfile: Build with PYTORCH_VERSION and CUDA args
    alt PYTORCH_VERSION==2.6.0 and CUDA==124
        Dockerfile->>pip: Install flash-attn==2.8.0.post2 (force build from source)
    else Other versions
        Dockerfile-->>pip: Skip flash-attn install
    end
Loading

Possibly related PRs

Suggested labels

ready to merge

Suggested reviewers

  • NanoCode012
  • djsaunde

Poem

In Docker’s den, a change appears,
For PyTorch and CUDA, the path now steers.
If versions match, a build from source—
Flash-attn joins the install course!
Rabbits hop with glee and cheer,
For tidy builds are always near.
🐇✨


Thanks for using CodeRabbit! It's free for OSS, and your support helps us grow. If you like it, consider giving us a shout-out.

❤️ Share
🪧 Tips

Chat

There are 3 ways to chat with CodeRabbit:

  • Review comments: Directly reply to a review comment made by CodeRabbit. Example:
    • I pushed a fix in commit <commit_id>, please review it.
    • Explain this complex logic.
    • Open a follow-up GitHub issue for this discussion.
  • Files and specific lines of code (under the "Files changed" tab): Tag @coderabbitai in a new review comment at the desired location with your query. Examples:
    • @coderabbitai explain this code block.
    • @coderabbitai modularize this function.
  • PR comments: Tag @coderabbitai in a new PR comment to ask questions about the PR branch. For the best results, please provide a very specific query, as very limited context is provided in this mode. Examples:
    • @coderabbitai gather interesting stats about this repository and render them as a table. Additionally, render a pie chart showing the language distribution in the codebase.
    • @coderabbitai read src/utils.ts and explain its main purpose.
    • @coderabbitai read the files in the src/scheduler package and generate a class diagram using mermaid and a README in the markdown format.
    • @coderabbitai help me debug CodeRabbit configuration file.

Support

Need help? Create a ticket on our support page for assistance with any issues or questions.

Note: Be mindful of the bot's finite context window. It's strongly recommended to break down tasks such as reading entire modules into smaller chunks. For a focused discussion, use review comments to chat about specific files and their changes, instead of using the PR comments.

CodeRabbit Commands (Invoked using PR comments)

  • @coderabbitai pause to pause the reviews on a PR.
  • @coderabbitai resume to resume the paused reviews.
  • @coderabbitai review to trigger an incremental review. This is useful when automatic reviews are disabled for the repository.
  • @coderabbitai full review to do a full review from scratch and review all the files again.
  • @coderabbitai summary to regenerate the summary of the PR.
  • @coderabbitai generate docstrings to generate docstrings for this PR.
  • @coderabbitai generate sequence diagram to generate a sequence diagram of the changes in this PR.
  • @coderabbitai resolve resolve all the CodeRabbit review comments.
  • @coderabbitai configuration to show the current CodeRabbit configuration for the repository.
  • @coderabbitai help to get help.

Other keywords and placeholders

  • Add @coderabbitai ignore anywhere in the PR description to prevent this PR from being reviewed.
  • Add @coderabbitai summary to generate the high-level summary at a specific location in the PR description.
  • Add @coderabbitai anywhere in the PR title to generate the title automatically.

CodeRabbit Configuration File (.coderabbit.yaml)

  • You can programmatically configure CodeRabbit by adding a .coderabbit.yaml file to the root of your repository.
  • Please see the configuration documentation for more information.
  • If your editor has YAML language server enabled, you can add the path at the top of this file to enable auto-completion and validation: # yaml-language-server: $schema=https://coderabbit.ai/integrations/schema.v2.json

Documentation and Community

  • Visit our Documentation for detailed information on how to use CodeRabbit.
  • Join our Discord Community to get help, request features, and share feedback.
  • Follow us on X/Twitter for updates and announcements.

Copy link
Copy Markdown
Contributor

@coderabbitai coderabbitai Bot left a comment

Choose a reason for hiding this comment

The reason will be displayed to describe this comment to others. Learn more.

Actionable comments posted: 1

📜 Review details

Configuration used: CodeRabbit UI
Review profile: CHILL
Plan: Pro

📥 Commits

Reviewing files that changed from the base of the PR and between 70ca1b2 and 356acca.

📒 Files selected for processing (1)
  • docker/Dockerfile-base (1 hunks)
🧰 Additional context used
🧠 Learnings (2)
📓 Common learnings
Learnt from: NanoCode012
PR: axolotl-ai-cloud/axolotl#2854
File: README.md:73-77
Timestamp: 2025-07-02T02:56:20.788Z
Learning: For Axolotl Docker commands, the `--ipc=host` flag should be included by default to prevent shared memory failures that commonly occur with PyTorch DataLoaders and multiprocessing during machine learning training workflows.
docker/Dockerfile-base (1)
Learnt from: NanoCode012
PR: axolotl-ai-cloud/axolotl#2854
File: README.md:73-77
Timestamp: 2025-07-02T02:56:20.788Z
Learning: For Axolotl Docker commands, the `--ipc=host` flag should be included by default to prevent shared memory failures that commonly occur with PyTorch DataLoaders and multiprocessing during machine learning training workflows.
🔇 Additional comments (1)
docker/Dockerfile-base (1)

41-43: Implementation looks technically sound.

The conditional installation logic is well-implemented:

  • Proper bash conditional syntax with string comparison
  • Inline environment variable setting for forcing source build
  • Appropriate package version pinning
  • Good placement in the Dockerfile after core dependencies

Comment thread docker/Dockerfile-base Outdated
@codecov
Copy link
Copy Markdown

codecov Bot commented Jul 5, 2025

Codecov Report

All modified and coverable lines are covered by tests ✅

📢 Thoughts on this report? Let us know!

@winglian winglian added the scheduled_release This PR is slated for the upcoming release label Jul 5, 2025
@winglian winglian merged commit a5946ff into main Jul 5, 2025
20 of 22 checks passed
@winglian winglian deleted the fa2-build branch July 5, 2025 13:21
@winglian winglian removed the scheduled_release This PR is slated for the upcoming release label Mar 22, 2026
Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment

Labels

None yet

Projects

None yet

Development

Successfully merging this pull request may close these issues.

1 participant