[https://nvbugs/5461712] [fix] Use DG for Qwen3 Linear layers - #8030
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Signed-off-by: Aurelien Chartier <2567591+achartier@users.noreply.github.com>
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📝 WalkthroughWalkthroughRemoves legacy deep_gemm disable flag usage in Qwen3 attention/decoder constructors. Adds post_load_weights to Qwen3ForCausalLM to re-smooth weights and scales into FP8 layout after loading when specific FP8 conditions are met. Introduces supporting imports (tqdm, is_sm_100f, FP8 utilities). Changes
Sequence Diagram(s)sequenceDiagram
autonumber
participant User
participant Qwen3ForCausalLM as Qwen3ForCausalLM
participant Modules as Model Modules
participant FP8Utils as FP8 Utils
User->>Qwen3ForCausalLM: load_state_dict(...)
Note over Qwen3ForCausalLM: Weights loaded
User->>Qwen3ForCausalLM: post_load_weights()
Qwen3ForCausalLM->>Modules: iterate all modules
alt Module meets FP8 conditions
Qwen3ForCausalLM->>FP8Utils: transform_sf_into_required_layout(scale_factors)
FP8Utils-->>Qwen3ForCausalLM: transformed scales
Qwen3ForCausalLM->>FP8Utils: resmooth_to_fp8_e8m0(weights, scales)
FP8Utils-->>Qwen3ForCausalLM: fp8_weights, fp8_scales
Qwen3ForCausalLM->>Modules: update module.weight, module.weight_scale
else Not FP8 or conditions unmet
Note over Modules: No changes
end
Qwen3ForCausalLM-->>User: post-load complete
Estimated code review effort🎯 3 (Moderate) | ⏱️ ~25 minutes Pre-merge checks and finishing touches❌ Failed checks (2 warnings)
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tensorrt_llm/_torch/models/modeling_qwen3.py(2 hunks)
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tensorrt_llm/_torch/models/modeling_qwen3.py
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Files:
tensorrt_llm/_torch/models/modeling_qwen3.py
🧬 Code graph analysis (1)
tensorrt_llm/_torch/models/modeling_qwen3.py (4)
tensorrt_llm/_utils.py (1)
is_sm_100f(695-698)tensorrt_llm/quantization/utils/fp8_utils.py (2)
resmooth_to_fp8_e8m0(82-92)transform_sf_into_required_layout(169-217)tensorrt_llm/_torch/models/modeling_deepseekv3.py (1)
post_load_weights(1522-1549)tensorrt_llm/module.py (1)
named_modules(102-114)
…#8030) Signed-off-by: Aurelien Chartier <2567591+achartier@users.noreply.github.com>
…#8030) Signed-off-by: Aurelien Chartier <2567591+achartier@users.noreply.github.com>
…#8030) Signed-off-by: Aurelien Chartier <2567591+achartier@users.noreply.github.com>
…#8030) Signed-off-by: Aurelien Chartier <2567591+achartier@users.noreply.github.com>
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