[https://nvbugs/1234567][fix] Revert https://github.com/NVIDIA/TensorRT-LLM/pull/7768/files #7813
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…ce NCCL on pre-Blackwell arch (NVIDIA#7768)" This reverts commit 88fe78e. Signed-off-by: Tao Li <tali@nvidia.com>
📝 WalkthroughWalkthroughSimplified AllReduce usage in LLaMA model by removing explicit AllReduceStrategy selection and SM-version checks. AllReduce is now instantiated with only the mapping parameter. Also removed AllReduceStrategy from the public import surface. No public APIs changed. Changes
Sequence Diagram(s)sequenceDiagram
participant Model as LLaMA Model
participant HW as GPU Runtime
participant AR as AllReduce
rect rgb(235, 245, 255)
note over Model,AR: Previous flow
Model->>Model: get_sm_version()
alt SM supports NCCL
Model->>AR: AllReduce(mapping, strategy=NCCL)
else Other
Model->>AR: AllReduce(mapping, strategy=Default)
end
AR->>HW: Execute collective
end
rect rgb(240, 255, 240)
note over Model,AR: New flow
Model->>AR: AllReduce(mapping) Note: strategy implicit (default)
AR->>HW: Execute collective
end
Estimated code review effort🎯 2 (Simple) | ⏱️ ~10 minutes Pre-merge checks and finishing touches❌ Failed checks (2 warnings)
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🧹 Nitpick comments (1)
tensorrt_llm/_torch/models/modeling_llama.py (1)
14-14: Style: keep module namespace for imports (nit).Per repo guidelines, prefer importing the module then referencing symbols via the module to avoid expanding the public symbol surface of this file.
Example:
from tensorrt_llm._torch import distributed as dist # usage: dist.AllReduce, dist.AllReduceParams, dist.AllReduceFusionOp, dist.MoEAllReduce
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tensorrt_llm/_torch/models/modeling_llama.py(2 hunks)
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tensorrt_llm/_torch/models/modeling_llama.py
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tensorrt_llm/_torch/models/modeling_llama.py (3)
tensorrt_llm/functional.py (1)
AllReduceParams(3899-3938)tensorrt_llm/_torch/distributed/ops.py (1)
AllReduce(362-491)tensorrt_llm/_torch/models/checkpoints/base_weight_mapper.py (1)
mapping(152-153)
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tensorrt_llm/_torch/models/modeling_llama.py (1)
298-301: Make AllReduce strategy handling consistent (revert intent).Found explicit strategy usage in tensorrt_llm/_torch/models/modeling_llama.py at lines 298–300 and 449–451; LlamaDecoderLayer at 649 uses mapping-only. Choose one approach and apply uniformly.
Option A (recommended — drop explicit strategy):
@@ - self.all_reduce = AllReduce( - mapping=model_config.mapping, - strategy=model_config.allreduce_strategy, - ) + self.all_reduce = AllReduce(mapping=model_config.mapping)Apply to Llama4MoE.init (298–301) and Llama4DecoderLayer.init (448–451).
Option B: add strategy at 649 instead if explicit control is required.
Note: repo also contains explicit AllReduce uses in modeling_qwen3_moe.py, modeling_deepseekv3.py, tensorrt_llm/_torch/modules/linear.py, modules/fused_moe/* and tests — consider repo-wide consistency.
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PR_Github #19018 [ run ] completed with state |
…RT-LLM/pull/7768/files (NVIDIA#7813) Signed-off-by: Tao Li
…RT-LLM/pull/7768/files (NVIDIA#7813) Signed-off-by: Tao Li Signed-off-by: Wangshanshan <30051912+dominicshanshan@users.noreply.github.com>
…RT-LLM/pull/7768/files (NVIDIA#7813) Signed-off-by: Tao Li Signed-off-by: Wangshanshan <30051912+dominicshanshan@users.noreply.github.com>
…RT-LLM/pull/7768/files (NVIDIA#7813) Signed-off-by: Tao Li Signed-off-by: Wangshanshan <30051912+dominicshanshan@users.noreply.github.com>
…RT-LLM/pull/7768/files (NVIDIA#7813) Signed-off-by: Tao Li Signed-off-by: Wangshanshan <30051912+dominicshanshan@users.noreply.github.com>
…RT-LLM/pull/7768/files (NVIDIA#7813) Signed-off-by: Tao Li Signed-off-by: Wangshanshan <30051912+dominicshanshan@users.noreply.github.com>
…RT-LLM/pull/7768/files (NVIDIA#7813) Signed-off-by: Tao Li Signed-off-by: Wangshanshan <30051912+dominicshanshan@users.noreply.github.com>
…RT-LLM/pull/7768/files (NVIDIA#7813) Signed-off-by: Tao Li Signed-off-by: Wangshanshan <30051912+dominicshanshan@users.noreply.github.com>
…RT-LLM/pull/7768/files (NVIDIA#7813) Signed-off-by: Tao Li Signed-off-by: Wangshanshan <30051912+dominicshanshan@users.noreply.github.com>
…RT-LLM/pull/7768/files (NVIDIA#7813) Signed-off-by: Tao Li Signed-off-by: Wangshanshan <30051912+dominicshanshan@users.noreply.github.com>
…RT-LLM/pull/7768/files (NVIDIA#7813) Signed-off-by: Tao Li Signed-off-by: Wangshanshan <30051912+dominicshanshan@users.noreply.github.com>
…RT-LLM/pull/7768/files (#7813) Signed-off-by: Tao Li Signed-off-by: Wangshanshan <30051912+dominicshanshan@users.noreply.github.com>
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…ce NCCL on pre-Blackwell arch (#7768)"
This reverts commit 88fe78e.
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