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Return MPS compiled library in get_native_library() #1241

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Return MPS compiled library in get_native_library() #1241

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5af7ea3
* the compiled library for MPS is now returned. This allows axolotl t…
sealad886 Jun 5, 2024
5b9d5c0
Merge branch 'TimDettmers:multi-backend-refactor' into multi-backend-…
sealad886 Jun 7, 2024
851b3b2
Merge branch 'TimDettmers:multi-backend-refactor' into multi-backend-…
sealad886 Jun 24, 2024
4be0a01
Merge branch 'bitsandbytes-foundation:multi-backend-refactor' into mu…
sealad886 Jul 12, 2024
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7 changes: 7 additions & 0 deletions bitsandbytes/cextension.py
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Original file line number Diff line number Diff line change
Expand Up @@ -100,11 +100,18 @@ def get_native_library() -> BNBNativeLibrary:
binary_path = cuda_binary_path
else:
logger.warning("Could not find the bitsandbytes CUDA binary at %r", cuda_binary_path)
elif torch.backends.mps.is_built():
binary_path = PACKAGE_DIR / f"libbitsandbytes_mps{DYNAMIC_LIBRARY_SUFFIX}"
logger.debug(f"Loading bitsandbytes native library from: {binary_path}")
dll = ct.cdll.LoadLibrary(str(binary_path))

if hasattr(dll, "get_context"): # only a CUDA-built library exposes this
return CudaBNBNativeLibrary(dll)

if "_mps" in str(binary_path):
logger.warning("The installed version of bitsandbytes was compiled with alpha MPS support. "
"This version may become unstable unexpectedly.")
return BNBNativeLibrary(dll)

logger.warning(
"The installed version of bitsandbytes was compiled without GPU support. "
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