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[docs] Attention checks - #12486
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[docs] Attention checks#12486
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sayakpaul
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Oct 15, 2025
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| try: | ||
| with attention_backend("flash"): | ||
| output = dispatch_attention_fn(query, key, value) | ||
| print("✓ Flash Attention works with checks enabled") | ||
| except Exception as e: | ||
| print(f"✗ Flash Attention failed: {e}") |
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I think this needs to be set as export DIFFUSERS_ATTN_CHECKS=yes before running any execution because of how DIFFUSERS_ATTN_CHECKS is used:
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this should be enabled here https://github.com/huggingface/diffusers/pull/12486/files#diff-249c332f10872ba150d634947de12055f99d9db5c3dbf2bef092ccba775f39bdR98 with os.environ["DIFFUSERS_ATTN_CHECKS"] = "1" no?
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Yeah DIFFUSERS_ATTN_CHECKS is determined at the module-level so I am not sure setting it that way would be effective.
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Ah ok, updated to use export DIFFUSERS_ATTN_CHECKS=yes then!
sayakpaul
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Oct 16, 2025
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Adds docs for how to enable checks when using different attention backends