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173f224570
Summary: Pull Request resolved: https://github.com/pytorch/pytorch/pull/18598 ghimport-source-id: c74597e5e7437e94a43c163cee0639b20d0d0c6a Stack from [ghstack](https://github.com/ezyang/ghstack): * **#18598 Turn on F401: Unused import warning.** This was requested by someone at Facebook; this lint is turned on for Facebook by default. "Sure, why not." I had to noqa a number of imports in __init__. Hypothetically we're supposed to use __all__ in this case, but I was too lazy to fix it. Left for future work. Be careful! flake8-2 and flake8-3 behave differently with respect to import resolution for # type: comments. flake8-3 will report an import unused; flake8-2 will not. For now, I just noqa'd all these sites. All the changes were done by hand. Signed-off-by: Edward Z. Yang <ezyang@fb.com> Differential Revision: D14687478 fbshipit-source-id: 30d532381e914091aadfa0d2a5a89404819663e3
111 lines
3.3 KiB
Python
111 lines
3.3 KiB
Python
import os
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import subprocess
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import glob
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from .env import IS_CONDA, IS_WINDOWS, CONDA_DIR, check_env_flag, check_negative_env_flag, gather_paths
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# On ROCm, RCCL development isn't complete. https://github.com/ROCmSoftwarePlatform/rccl
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USE_DISTRIBUTED = not check_negative_env_flag("USE_DISTRIBUTED") and not IS_WINDOWS and not check_env_flag("USE_ROCM")
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USE_GLOO_IBVERBS = False
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IB_DEVINFO_CMD = "ibv_devinfo"
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def get_command_path(command):
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"""
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Helper function that checks if the command exists in the path and gets the
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full path of a given linux command if it exists.
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"""
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def excutable(command_path):
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return os.path.isfile(command_path) and os.access(command_path, os.X_OK)
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for path in os.environ["PATH"].split(os.pathsep):
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command_path = os.path.join(path, command)
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if excutable(command_path):
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return command_path
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return None
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def should_build_ib():
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"""
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Helper function that detects the system's IB support and returns if we
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should build with IB support.
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"""
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ib_util_found = False
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ib_lib_found = False
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ib_header_found = False
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try:
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# If the command doesn't exist, we can directly return instead of
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# making a subprocess call
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full_cmd_path = get_command_path(IB_DEVINFO_CMD)
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if not full_cmd_path:
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ib_util_found = False
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subprocess.check_output([full_cmd_path, "--list"])
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# Here we just would like to simply run the command to test if IB
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# related tools / lib are installed without parsing the output. We
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# will enable IB build as long as the command runs successfully.
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#
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# The output should look like either:
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#
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# > ibv_devinfo --list
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# 0 HCAs founds:
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#
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# or
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#
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# > ibv_devinfo --list
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# 4 HCAs found:
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# mlx5_3
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# mlx5_2
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# mlx5_1
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# mlx5_0
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ib_util_found = True
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except Exception:
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# We just take all the exceptions here without affecting the build
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ib_util_found = False
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lib_paths = list(filter(bool, [
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"/usr/lib/",
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"/usr/lib/x86_64-linux-gnu/",
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"/usr/lib/powerpc64le-linux-gnu/",
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"/usr/lib/aarch64-linux-gnu/",
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] + gather_paths([
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"LIBRARY_PATH",
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]) + gather_paths([
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"LD_LIBRARY_PATH",
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])))
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include_paths = [
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"/usr/include/",
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]
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if IS_CONDA:
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lib_paths.append(os.path.join(CONDA_DIR, "lib"))
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include_paths.append(os.path.join(CONDA_DIR, "include"))
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for path in lib_paths:
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if path is None or not os.path.exists(path):
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continue
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ib_libraries = sorted(glob.glob(os.path.join(path, "libibverbs*")))
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if ib_libraries:
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ib_lib_found = True
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break
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for path in include_paths:
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if path is None or not os.path.exists(path):
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continue
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if os.path.exists(os.path.join(path, "infiniband/verbs.h")):
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ib_header_found = True
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break
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return ib_util_found and ib_lib_found and ib_lib_found
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if USE_DISTRIBUTED:
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# If the env variable is specified, use the value,
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# otherwise only build with IB when IB support is detected on the system
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if "USE_GLOO_IBVERBS" in os.environ:
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USE_GLOO_IBVERBS = check_env_flag("USE_GLOO_IBVERBS")
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else:
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USE_GLOO_IBVERBS = should_build_ib()
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