You can fingerprint your exact GPU with a single torch.index_add_ call
CatAstro_Piyush · x · 2026-10-31
A new writeup shows that a single default torch.indexadd call can fingerprint the exact GPU you're running on — even among otherwise identical GPUs.
The trick works because floating-point math depends on operation order, and every GPU has its own. The resulting fingerprint survives reboots and cannot be faked, with implications for device tracking and numerical reproducibility.
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