[https://nvbugs/5537348][fix] Use device tensor index for MTP #8062
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📝 WalkthroughWalkthroughRemoves host last-token tracking from prepare_position_ids_and_last_tokens, now returning only position_ids and last_tokens_idx. Updates all call sites accordingly. Renames MTPEagleWorker.prepare_drafter_inputs parameter from last_tokens_idx_host to last_tokens_idx and updates internal references and argument passing. No broader control flow or error handling changes. Changes
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tensorrt_llm/_torch/speculative/mtp.py (1)
1-1: Add NVIDIA Apache-2.0 header (2025) at file top.Required by coding guidelines; prepend the standard header.
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+# Copyright (c) 2025, NVIDIA CORPORATION & AFFILIATES. All rights reserved. +# Licensed under the Apache License, Version 2.0 (the "License"); +# you may not use this file except in compliance with the License. +# You may obtain a copy of the License at +# http://www.apache.org/licenses/LICENSE-2.0 +# Unless required by applicable law or agreed to in writing, software +# distributed under the License is distributed on an "AS IS" BASIS, +# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +# See the License for the specific language governing permissions and +# limitations under the License.As per coding guidelines.
🧹 Nitpick comments (1)
tensorrt_llm/_torch/speculative/mtp.py (1)
1351-1360: Update method doc/comments to reflect new last_tokens_idx param.Add a brief docstring noting last_tokens_idx is CUDA long indices from seq_lens_cuda; helps future maintainers and prevents accidental CPU use.
Apply:
@torch.compile(options={"max-autotune": True}) def prepare_drafter_inputs( self, input_ids: torch.IntTensor, position_ids: torch.IntTensor, last_tokens_idx: torch.LongTensor, hidden_states: torch.Tensor, accepted_tokens: torch.Tensor, attn_metadata: AttentionMetadata, spec_metadata: MTPSpecMetadata, ): + """ + Prepare drafter inputs for Eagle. + + Args: + last_tokens_idx (torch.LongTensor): CUDA indices (one per seq) of the last token, + computed from attn_metadata.seq_lens_cuda via cumsum-1. Must be on device. + """As per coding guidelines.
Also applies to: 1370-1370
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tensorrt_llm/_torch/speculative/mtp.py(3 hunks)
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tensorrt_llm/_torch/speculative/mtp.py (2)
tensorrt_llm/_torch/pyexecutor/cuda_graph_runner.py (2)
attn_metadata(119-120)spec_metadata(111-112)tensorrt_llm/_torch/attention_backend/interface.py (2)
num_contexts(195-196)num_contexts(199-202)
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🔇 Additional comments (2)
tensorrt_llm/_torch/speculative/mtp.py (2)
1202-1208: Call site updated to pass device index — LGTM.Signature/argument alignment looks correct for MTPEagleWorker.
1194-1199: Fix quoting error in the grep pattern and re-run verification:#!/bin/bash # Find any remaining host-based index usage rg -nP "last_tokens_idx_host|to\s*\(\s*['\"]cpu['\"]\s*\)\s*.*last_tokens_idx"
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PR_Github #20267 [ run ] completed with state |
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PR_Github #20498 [ run ] triggered by Bot |
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PR_Github #20498 [ run ] completed with state |
Signed-off-by: Jin Li <59594262+liji-nv@users.noreply.github.com>
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…#8062) Signed-off-by: Jin Li <59594262+liji-nv@users.noreply.github.com>
…#8062) Signed-off-by: Jin Li <59594262+liji-nv@users.noreply.github.com> Signed-off-by: Mike Iovine <6158008+mikeiovine@users.noreply.github.com>
…#8062) Signed-off-by: Jin Li <59594262+liji-nv@users.noreply.github.com> Signed-off-by: Mike Iovine <6158008+mikeiovine@users.noreply.github.com>
…#8062) Signed-off-by: Jin Li <59594262+liji-nv@users.noreply.github.com> Signed-off-by: Mike Iovine <6158008+mikeiovine@users.noreply.github.com>
…#8062) Signed-off-by: Jin Li <59594262+liji-nv@users.noreply.github.com> Signed-off-by: Mike Iovine <6158008+mikeiovine@users.noreply.github.com>
…#8062) Signed-off-by: Jin Li <59594262+liji-nv@users.noreply.github.com> Signed-off-by: Mike Iovine <6158008+mikeiovine@users.noreply.github.com>
…#8062) Signed-off-by: Jin Li <59594262+liji-nv@users.noreply.github.com> Signed-off-by: Mike Iovine <6158008+mikeiovine@users.noreply.github.com>
…#8062) Signed-off-by: Jin Li <59594262+liji-nv@users.noreply.github.com> Signed-off-by: Mike Iovine <6158008+mikeiovine@users.noreply.github.com>
…#8062) Signed-off-by: Jin Li <59594262+liji-nv@users.noreply.github.com> Signed-off-by: Mike Iovine <6158008+mikeiovine@users.noreply.github.com>
Signed-off-by: Jin Li <59594262+liji-nv@users.noreply.github.com> Signed-off-by: Mike Iovine <6158008+mikeiovine@users.noreply.github.com>
…#8062) Signed-off-by: Jin Li <59594262+liji-nv@users.noreply.github.com> Signed-off-by: Mike Iovine <6158008+mikeiovine@users.noreply.github.com>
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