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[https://nvbugs/5374016][fix] improve error message #6893

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Merged
QiJune merged 3 commits into from
Aug 19, 2025
Merged

[https://nvbugs/5374016][fix] improve error message #6893

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72b334e
improve error message
QiJune Aug 14, 2025
f751b56
Merge branch 'release/1.0' into error_message
QiJune Aug 14, 2025
613407e
Merge branch 'release/1.0' into error_message
QiJune Aug 15, 2025
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8 changes: 7 additions & 1 deletion tensorrt_llm/_torch/attention_backend/trtllm.py
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Original file line number Diff line number Diff line change
Expand Up @@ -763,8 +763,14 @@ def prepare(self) -> None:
self.kv_cache_block_offsets[:, :self.num_seqs].copy_(
self.host_kv_cache_block_offsets[:, :self.num_seqs],
non_blocking=True)

error_message = (
f"The max KV cache length of input sequences ({self.kv_lens[:self.num_seqs].max()}) "
f"exceeds the KV cache manager's maximum supported length "
f"({self.kv_cache_manager.max_seq_len}).")

assert self.kv_lens[:self.num_seqs].max(
) <= self.kv_cache_manager.max_seq_len, f"Please set max_seq_len to at least {self.kv_lens[:self.num_seqs].max()} for kv cache manager."
) <= self.kv_cache_manager.max_seq_len, error_message

self.kv_lens_cuda_runtime = self.kv_lens_cuda[:self.num_seqs]
self.kv_lens_runtime = self.kv_lens[:self.num_seqs]
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