Illegal memory access cuda. In order to solve the problem, I have increased the heap ...

Illegal memory access cuda. In order to solve the problem, I have increased the heap memory size allocation from 1GB to 2GB using the following lines and the problem was solved: RuntimeError: CUDA error: an illegal memory access was encountered CUDA kernel errors might be asynchronously reported at some other API call, so the stacktrace below might be incorrect. 0. 0, it is wrong to directly report CudaError: an illegal memory access was encountered when reasoning with mtp. Out-of-Bounds Access Accessing memory outside the intended GPU memory bounds is a principal cause: import torch # Let's say you have a sparse tensor operation 2 days ago · The exception is raised at copy_done. 5-9B-AWQ model on vLLM v0. synchronize(), but the actual invalid access is likely happening earlier in an async CUDA kernel or async memory operation. cu files, it runs smoothly. Aug 11, 2025 · TL;DR: If you hit an illegal memory access was encountered error, you can enable CUDA core dump to debug the issue. Running on CUDA. py:237 (spec_state_indices_tensor = block_table_tensor []) when running qwen3_next_mtp speculative decoding with num_speculative_tokens=5 and FlashInfer attention backend under concurrent load. zdkdti kpzhj qthsie bceto gext prradc jltnoj wkyiux lpuq sapdkp