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- # -------------------------------------------------------------------------
- # Copyright (c) Microsoft Corporation. All rights reserved.
- # Licensed under the MIT License.
- # --------------------------------------------------------------------------
- import ctypes
- import sys
- import warnings
- def find_cudart_versions(build_env=False, build_cuda_version=None):
- # ctypes.CDLL and ctypes.util.find_library load the latest installed library.
- # it may not the the library that would be loaded by onnxruntime.
- # for example, in an environment with Cuda 11.1 and subsequently
- # conda cudatoolkit 10.2.89 installed. ctypes will find cudart 10.2. however,
- # onnxruntime built with Cuda 11.1 will find and load cudart for Cuda 11.1.
- # for the above reason, we need find all versions in the environment and
- # only give warnings if the expected cuda version is not found.
- # in onnxruntime build environment, we expected only one Cuda version.
- if not sys.platform.startswith("linux"):
- warnings.warn("find_cudart_versions only works on Linux")
- return None
- cudart_possible_versions = {None, build_cuda_version}
- def get_cudart_version(find_cudart_version=None):
- cudart_lib_filename = "libcudart.so"
- if find_cudart_version:
- cudart_lib_filename = cudart_lib_filename + "." + find_cudart_version
- try:
- cudart = ctypes.CDLL(cudart_lib_filename)
- cudart.cudaRuntimeGetVersion.restype = int
- cudart.cudaRuntimeGetVersion.argtypes = [ctypes.POINTER(ctypes.c_int)]
- version = ctypes.c_int()
- status = cudart.cudaRuntimeGetVersion(ctypes.byref(version))
- if status != 0:
- return None
- except Exception:
- return None
- return version.value
- # use set to avoid duplications
- cudart_found_versions = {get_cudart_version(cudart_version) for cudart_version in cudart_possible_versions}
- # convert to list and remove None
- return [ver for ver in cudart_found_versions if ver]
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