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Uses MPS (Mac acceleration) by default when available #382

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Uses MPS (Mac acceleration) by default when available #382

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bdd0d79
MPS (Mac acceleration) by default if available
dwarkeshsp Oct 21, 2022
2c91499
Merge branch 'main' into main
jongwook Jan 18, 2023
4b77a81
hasattr check for torch.backends.mps
jongwook Jan 18, 2023
51c785f
add another hasattr check for torch.backends.mps
jongwook Jan 18, 2023
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7 changes: 6 additions & 1 deletion whisper/__init__.py
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Original file line number Diff line number Diff line change
Expand Up @@ -92,7 +92,12 @@ def load_model(name: str, device: Optional[Union[str, torch.device]] = None, dow
"""

if device is None:
device = "cuda" if torch.cuda.is_available() else "cpu"
if torch.cuda.is_available():
device = "cuda"
elif hasattr(torch.backends, "mps") and torch.backends.mps.is_available():
device = "mps"
else:
device = "cpu"
if download_root is None:
download_root = os.getenv(
"XDG_CACHE_HOME",
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2 changes: 2 additions & 0 deletions whisper/transcribe.py
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Expand Up @@ -75,6 +75,8 @@ def transcribe(
if model.device == torch.device("cpu"):
if torch.cuda.is_available():
warnings.warn("Performing inference on CPU when CUDA is available")
if hasattr(torch.backends, "mps") and torch.backends.mps.is_available():
warnings.warn("Performing inference on CPU when MPS is available")
if dtype == torch.float16:
warnings.warn("FP16 is not supported on CPU; using FP32 instead")
dtype = torch.float32
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