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- """
- Copyright 2020 The Microsoft DeepSpeed Team
- """
- import distutils.spawn
- import subprocess
- from .builder import OpBuilder
- class AsyncIOBuilder(OpBuilder):
- BUILD_VAR = "DS_BUILD_AIO"
- NAME = "async_io"
- def __init__(self):
- super().__init__(name=self.NAME)
- def absolute_name(self):
- return f'deepspeed.ops.aio.{self.NAME}_op'
- def sources(self):
- return [
- 'csrc/aio/py_lib/deepspeed_py_copy.cpp',
- 'csrc/aio/py_lib/py_ds_aio.cpp',
- 'csrc/aio/py_lib/deepspeed_py_aio.cpp',
- 'csrc/aio/py_lib/deepspeed_py_aio_handle.cpp',
- 'csrc/aio/py_lib/deepspeed_aio_thread.cpp',
- 'csrc/aio/common/deepspeed_aio_utils.cpp',
- 'csrc/aio/common/deepspeed_aio_common.cpp',
- 'csrc/aio/common/deepspeed_aio_types.cpp'
- ]
- def include_paths(self):
- return ['csrc/aio/py_lib', 'csrc/aio/common']
- def cxx_args(self):
- # -O0 for improved debugging, since performance is bound by I/O
- CPU_ARCH = self.cpu_arch()
- SIMD_WIDTH = self.simd_width()
- return [
- '-g',
- '-Wall',
- '-O0',
- '-std=c++14',
- '-shared',
- '-fPIC',
- '-Wno-reorder',
- CPU_ARCH,
- '-fopenmp',
- SIMD_WIDTH,
- '-laio',
- ]
- def extra_ldflags(self):
- return ['-laio']
- def check_for_libaio_pkg(self):
- libs = dict(
- dpkg=["-l",
- "libaio-dev",
- "apt"],
- pacman=["-Q",
- "libaio",
- "pacman"],
- rpm=["-q",
- "libaio-devel",
- "yum"],
- )
- found = False
- for pkgmgr, data in libs.items():
- flag, lib, tool = data
- path = distutils.spawn.find_executable(pkgmgr)
- if path is not None:
- cmd = f"{pkgmgr} {flag} {lib}"
- result = subprocess.Popen(cmd,
- stdout=subprocess.PIPE,
- stderr=subprocess.PIPE,
- shell=True)
- if result.wait() == 0:
- found = True
- else:
- self.warning(
- f"{self.NAME}: please install the {lib} package with {tool}")
- break
- return found
- def is_compatible(self):
- # Check for the existence of libaio by using distutils
- # to compile and link a test program that calls io_submit,
- # which is a function provided by libaio that is used in the async_io op.
- # If needed, one can define -I and -L entries in CFLAGS and LDFLAGS
- # respectively to specify the directories for libaio.h and libaio.so.
- aio_compatible = self.has_function('io_submit', ('aio', ))
- if not aio_compatible:
- self.warning(
- f"{self.NAME} requires the dev libaio .so object and headers but these were not found."
- )
- # Check for the libaio package via known package managers
- # to print suggestions on which package to install.
- self.check_for_libaio_pkg()
- self.warning(
- "If libaio is already installed (perhaps from source), try setting the CFLAGS and LDFLAGS environment variables to where it can be found."
- )
- return super().is_compatible() and aio_compatible
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