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Fix: fix activation and loss #12

Merged
merged 1 commit into from
Jun 25, 2024
Merged

Fix: fix activation and loss #12

merged 1 commit into from
Jun 25, 2024

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anyangml
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@anyangml anyangml commented Jun 21, 2024

Summary by CodeRabbit

  • New Features

    • Improved initialization and configuration of Vision Transformer (ViT) and GPT models for better performance.
    • Enhanced loss computation in CLIPLoss class with flexible device parameter handling.
    • Optimized temperature handling, linear projections, and normalization in CLIP model for more accurate results.
  • Bug Fixes

    • Fixed shape assertion in GPT model test case to align with updated configuration.
  • Refactor

    • Simplified constructor and forward method in CLIPLoss class for improved clarity and maintainability.

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Codecov Report

Attention: Patch coverage is 68.42105% with 6 lines in your changes missing coverage. Please review.

Project coverage is 88.44%. Comparing base (7c06a93) to head (09d7887).

Files Patch % Lines
clip/clip/loss.py 0.00% 6 Missing ⚠️

❗ Your organization needs to install the Codecov GitHub app to enable full functionality.

Additional details and impacted files
@@            Coverage Diff             @@
##             main      #12      +/-   ##
==========================================
- Coverage   88.70%   88.44%   -0.27%     
==========================================
  Files           6        6              
  Lines         248      251       +3     
==========================================
+ Hits          220      222       +2     
- Misses         28       29       +1     

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

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coderabbitai bot commented Jun 21, 2024

Walkthrough

Walkthrough

The recent updates focused on refining various components of the CLIP model, particularly within its Vision Transformer (ViT) and GPT architectures. This involved adjustments to embedding dimensions, layer normalization, MLP structures, and loss computations. The CLIP model now features more robust temperature handling and normalization within its forward method. Additionally, tests were updated to reflect these changes.

Changes

Files Change Summary
clip/clip/image/vit.py Modified ViT model initialization, embedding dimensions, layer normalization, and MLP head structure.
clip/clip/languange/gpt.py Added mlp_size and out_dim to GPTConfig, updated GPT's MLP computations and output dimensions.
clip/clip/loss.py Altered CLIPLoss constructor to use device parameter, adjusted loss computation in forward method.
clip/clip/model.py Improved temperature handling, projections, normalization in CLIP class, updated forward calculations.
clip/tests/language/test_gpt.py Changed test assertion to expect shape using config.out_dim.

Sequence Diagrams

sequenceDiagram
    participant User
    participant ViT
    participant GPT
    participant CLIP
    
    Note over User,CLIP: Data passes through different stages

    User ->> ViT: Image data
    ViT ->> CLIP: Extracted features
    User ->> GPT: Text data
    GPT ->> CLIP: Encoded text features
    CLIP ->> CLIP: Normalize and compute logits
    CLIP ->> User: Similarity results
Loading

Poem

Amidst the code in silence deep,
Transformations made to make us leap.
ViT and GPT refined anew,
With norms and embeddings all in queue.
Now CLIP shines with clearer sight,
Our models soar to greater height.
🎉🐰✨


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Actionable comments posted: 2

Outside diff range and nitpick comments (1)
clip/clip/model.py (1)

Line range hint 4-4: Remove Unused Import

The import of numpy is unused and should be removed to clean up the code.

- import numpy as np
Tools
Ruff

11-11: Yoda conditions are discouraged, use temperature > 0 instead (SIM300)

Replace Yoda condition with temperature > 0

Review details

Configuration used: CodeRabbit UI
Review profile: CHILL

Commits

Files that changed from the base of the PR and between 7c06a93 and 09d7887.

Files selected for processing (5)
  • clip/clip/image/vit.py (1 hunks)
  • clip/clip/languange/gpt.py (4 hunks)
  • clip/clip/loss.py (1 hunks)
  • clip/clip/model.py (1 hunks)
  • clip/tests/language/test_gpt.py (1 hunks)
Files not reviewed due to errors (1)
  • clip/clip/languange/gpt.py (no review received)
Additional context used
Ruff
clip/clip/model.py

4-4: numpy imported but unused (F401)

Remove unused import: numpy


11-11: Yoda conditions are discouraged, use temperature > 0 instead (SIM300)

Replace Yoda condition with temperature > 0

Additional comments not posted (5)
clip/clip/loss.py (2)

7-9: Constructor Simplification

The constructor of CLIPLoss has been simplified to only require a device parameter. This change makes the class more flexible and easier to use in different contexts.


15-18: Dynamic Batch Size Handling

The update to dynamically determine the batch size based on the input tensor is a good improvement. It enhances the flexibility of the loss function to handle varying batch sizes.

clip/clip/model.py (1)

24-24: Temperature Parameter Handling

The change to handle the temperature as a log-transformed parameter using nn.Parameter is a clever way to ensure that the temperature remains positive and within a specific range during training.

clip/clip/image/vit.py (2)

53-57: Refactor of MLP head in ViT class approved

The new MLP head structure introduces additional layers and normalization, which are likely to improve the model's ability to learn complex patterns. However, consider adding comments to explain the design choice, especially the introduction of the intermediate layer normalization and the two-stage linear transformation.

[REFACTOR_SUGGESTion]

+        # Layer normalization is applied before the MLP layers to ensure that the features are normalized
+        # The MLP consists of two linear transformations with an intermediate layer normalization to enhance learning stability and performance

Line range hint 1-57: Overall architecture and initialization method of ViT class are well-implemented

The overall architecture of the ViT class, including transformer blocks and attention mechanisms, is robust. The custom weight initialization method is appropriate for the network's layers, ensuring good model convergence. No further action is needed here.
[APROVED]

@@ -12,4 +12,4 @@ def test_GPT_forward_shape():
dummy_txts[1, 928] = 50256

ecoded = gpt(dummy_txts)
assert ecoded.shape == (2, config.vocab_size)
assert ecoded.shape == (2, config.out_dim)
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Typographical Error in Variable Name

The variable ecoded should be corrected to encoded to match the variable name used in the test function.

- ecoded = gpt(dummy_txts)
+ encoded = gpt(dummy_txts)

Committable suggestion was skipped due to low confidence.

@@ -8,28 +8,29 @@ class CLIP(nn.Module):
def __init__(self, txt_encoder, img_encoder, embd_dim, temperature):
super().__init__()

assert 0 <= temperature <= 1, "temperature must be in range [0,1]"
assert 0 < temperature, "temperature must be greater than zero."
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Use of Yoda Conditions

Replace the Yoda condition with a more conventional conditional expression for better readability.

- assert 0 < temperature, "temperature must be greater than zero."
+ assert temperature > 0, "Temperature must be greater than zero."
Committable suggestion

‼️ IMPORTANT
Carefully review the code before committing. Ensure that it accurately replaces the highlighted code, contains no missing lines, and has no issues with indentation. Thoroughly test & benchmark the code to ensure it meets the requirements.

Suggested change
assert 0 < temperature, "temperature must be greater than zero."
assert temperature > 0, "Temperature must be greater than zero."
Tools
Ruff

11-11: Yoda conditions are discouraged, use temperature > 0 instead (SIM300)

Replace Yoda condition with temperature > 0

@anyangml anyangml merged commit 39f93a2 into main Jun 25, 2024
1 check passed
@anyangml anyangml deleted the fix/activation-func branch July 31, 2024 10:00
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2 participants