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Add SDPABackend for SD and SDXL #2061

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Add SDPABackend for SD and SDXL #2061

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@rockerBOO rockerBOO commented Apr 22, 2025 •
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Note have not tried this myself yet. Same implementation as I have for flux.

Flash Attention maybe won't work because we are using an attention mask.
cuDNN may have issues but you can enable it via TORCH_CUDNN_SDPA_ENABLED=1.

FLASH_ATTENTION: The flash attention backend for scaled dot product attention.
CUDNN_ATTENTION: The cuDNN backend for scaled dot product attention.
EFFICIENT_ATTENTION: The efficient attention backend for scaled dot product attention.
MATH: The math backend for scaled dot product attention.

Related: #2045

@rockerBOO rockerBOO mentioned this pull request Apr 22, 2025
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