GB10 GPU flips between a fast and a slow hidden state (decode 63 vs 94 ms/step); nvidia-smi shows nothing
Users are experiencing inconsistent GPU performance on GB10 hardware, with decode speeds fluctuating significantly between fast (63 ms/step) and slow (94 ms/step) states. This performance degradation occurs even when `nvidia-smi` reports stable clock speeds and no throttling. The issue is reproducible with a standalone PyTorch script, suggesting a potential hardware or low-level driver problem.