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Use SDP on BF16 in GPU/HPU migration #12310

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Merged
merged 2 commits into from
Sep 12, 2025
Merged

Use SDP on BF16 in GPU/HPU migration #12310

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8e73b58
Use SDP on BF16 in GPU/HPU migration
dsocek Sep 10, 2025
b05259a
Formatting fix for enabling SDP with BF16 precision on HPU
dsocek Sep 12, 2025
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7 changes: 7 additions & 0 deletions src/diffusers/pipelines/pipeline_utils.py
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Original file line number Diff line number Diff line change
Expand Up @@ -504,6 +504,13 @@ def module_is_offloaded(module):
os.environ["PT_HPU_MAX_COMPOUND_OP_SIZE"] = "1"
logger.debug("Environment variable set: PT_HPU_MAX_COMPOUND_OP_SIZE=1")

if dtype in (torch.bfloat16, None) and kwargs.pop("sdp_on_bf16", True):
if hasattr(torch._C, "_set_math_sdp_allow_fp16_bf16_reduction"):
torch._C._set_math_sdp_allow_fp16_bf16_reduction(True)
logger.warning(
"Enabled SDP with BF16 precision on HPU. To disable, please use `.to('hpu', sdp_on_bf16=False)`"
)

module_names, _ = self._get_signature_keys(self)
modules = [getattr(self, n, None) for n in module_names]
modules = [m for m in modules if isinstance(m, torch.nn.Module)]
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