def _adjust_target(self, spec):
"""Assumes that the architecture and the compiler have been
set already and checks if the current target microarchitecture
is the default and can be optimized by the compiler.
If not, downgrades the microarchitecture until a suitable one
is found. If none can be found raise an error.
Args:
spec: spec to be concretized
Returns:
True if any modification happened, False otherwise
"""
import archspec.cpu
# Try to adjust the target only if it is the default
# target for this platform
current_target = spec.architecture.target
current_platform = spack.architecture.get_platform(
spec.architecture.platform
)
default_target = current_platform.target('default_target')
if PackagePrefs.has_preferred_targets(spec.name):
default_target = self.target_from_package_preferences(spec)
if current_target != default_target or (
self.abstract_spec and
self.abstract_spec.architecture and
self.abstract_spec.architecture.concrete):
return False
try:
current_target.optimization_flags(spec.compiler)
except archspec.cpu.UnsupportedMicroarchitecture:
microarchitecture = current_target.microarchitecture
for ancestor in microarchitecture.ancestors:
candidate = None
try:
candidate = spack.architecture.Target(ancestor)
candidate.optimization_flags(spec.compiler)
except archspec.cpu.UnsupportedMicroarchitecture:
continue
if candidate is not None:
msg = ('{0.name}@{0.version} cannot build optimized '
'binaries for "{1}". Using best target possible: '
'"{2}"')
msg = msg.format(spec.compiler, current_target, candidate)
tty.warn(msg)
spec.architecture.target = candidate
return True
else:
raise
return False
def concretize_architecture(self, spec):
"""If the spec is empty provide the defaults of the platform. If the
architecture is not a string type, then check if either the platform,
target or operating system are concretized. If any of the fields are
changed then return True. If everything is concretized (i.e the
architecture attribute is a namedtuple of classes) then return False.
If the target is a string type, then convert the string into a
concretized architecture. If it has no architecture and the root of the
DAG has an architecture, then use the root otherwise use the defaults
on the platform.
"""
# ensure type safety for the architecture
if spec.architecture is None:
spec.architecture = spack.spec.ArchSpec()
if spec.architecture.platform and \
(spec.architecture.os and spec.architecture.target):
return False
# Get platform of nearest spec with a platform, including spec
# If spec has a platform, easy
if spec.architecture.platform:
new_plat = spack.architecture.get_platform(
spec.architecture.platform)
else:
# Else if anyone else has a platform, take the closest one
# Search up, then down, along build/link deps first
# Then any nearest. Algorithm from compilerspec search
platform_spec = find_spec(
spec, lambda x: x.architecture and x.architecture.platform)
if platform_spec:
new_plat = spack.architecture.get_platform(
platform_spec.architecture.platform)
else:
# If no platform anywhere in this spec, grab the default
new_plat = spack.architecture.platform()
# Get nearest spec with relevant platform and an os
# Generally, same algorithm as finding platform, except we only
# consider specs that have a platform
if spec.architecture.os:
new_os = spec.architecture.os
else:
new_os_spec = find_spec(
spec, lambda x: (x.architecture and x.architecture.platform ==
str(new_plat) and x.architecture.os))
if new_os_spec:
new_os = new_os_spec.architecture.os
else:
new_os = new_plat.operating_system('default_os')
# Get the nearest spec with relevant platform and a target
# Generally, same algorithm as finding os
if spec.architecture.target:
new_target = spec.architecture.target
else:
new_target_spec = find_spec(
spec, lambda x: (x.architecture and x.architecture.platform ==
str(new_plat) and x.architecture.target))
if new_target_spec:
new_target = new_target_spec.architecture.target
else:
# To get default platform, consider package prefs
if PackagePrefs.has_preferred_targets(spec.name):
target_prefs = PackagePrefs(spec.name, 'target')
target_specs = [
spack.spec.Spec('target=%s' % tname)
for tname in cpu.targets
]
def tspec_filter(s):
# Filter target specs by whether the architecture
# family is the current machine type. This ensures
# we only consider x86_64 targets when on an
# x86_64 machine, etc. This may need to change to
# enable setting cross compiling as a default
target = cpu.targets[str(s.architecture.target)]
arch_family_name = target.family.name
return arch_family_name == platform.machine()
# Sort filtered targets by package prefs
target_specs = list(filter(tspec_filter, target_specs))
target_specs.sort(key=target_prefs)
new_target = target_specs[0].architecture.target
else:
new_target = new_plat.target('default_target')
# Construct new architecture, compute whether spec changed
arch_spec = (str(new_plat), str(new_os), str(new_target))
new_arch = spack.spec.ArchSpec(arch_spec)
spec_changed = new_arch != spec.architecture
spec.architecture = new_arch
return spec_changed
def concretize_architecture(self, spec):
"""If the spec is empty provide the defaults of the platform. If the
architecture is not a string type, then check if either the platform,
target or operating system are concretized. If any of the fields are
changed then return True. If everything is concretized (i.e the
architecture attribute is a namedtuple of classes) then return False.
If the target is a string type, then convert the string into a
concretized architecture. If it has no architecture and the root of the
DAG has an architecture, then use the root otherwise use the defaults
on the platform.
"""
# ensure type safety for the architecture
if spec.architecture is None:
spec.architecture = spack.spec.ArchSpec()
if spec.architecture.concrete:
return False
# Get platform of nearest spec with a platform, including spec
# If spec has a platform, easy
if spec.architecture.platform:
new_plat = spack.architecture.get_platform(
spec.architecture.platform)
else:
# Else if anyone else has a platform, take the closest one
# Search up, then down, along build/link deps first
# Then any nearest. Algorithm from compilerspec search
platform_spec = find_spec(
spec, lambda x: x.architecture and x.architecture.platform
)
if platform_spec:
new_plat = spack.architecture.get_platform(
platform_spec.architecture.platform)
else:
# If no platform anywhere in this spec, grab the default
new_plat = spack.architecture.platform()
# Get nearest spec with relevant platform and an os
# Generally, same algorithm as finding platform, except we only
# consider specs that have a platform
if spec.architecture.os:
new_os = spec.architecture.os
else:
new_os_spec = find_spec(
spec, lambda x: (x.architecture and
x.architecture.platform == str(new_plat) and
x.architecture.os)
)
if new_os_spec:
new_os = new_os_spec.architecture.os
else:
new_os = new_plat.operating_system('default_os')
# Get the nearest spec with relevant platform and a target
# Generally, same algorithm as finding os
curr_target = None
if spec.architecture.target:
curr_target = spec.architecture.target
if spec.architecture.target and spec.architecture.target_concrete:
new_target = spec.architecture.target
else:
new_target_spec = find_spec(
spec, lambda x: (x.architecture and
x.architecture.platform == str(new_plat) and
x.architecture.target and
x.architecture.target != curr_target)
)
if new_target_spec:
if curr_target:
# constrain one target by the other
new_target_arch = spack.spec.ArchSpec(
(None, None, new_target_spec.architecture.target))
curr_target_arch = spack.spec.ArchSpec(
(None, None, curr_target))
curr_target_arch.constrain(new_target_arch)
new_target = curr_target_arch.target
else:
new_target = new_target_spec.architecture.target
else:
# To get default platform, consider package prefs
if PackagePrefs.has_preferred_targets(spec.name):
new_target = self.target_from_package_preferences(spec)
else:
new_target = new_plat.target('default_target')
if curr_target:
# convert to ArchSpec to compare satisfaction
new_target_arch = spack.spec.ArchSpec(
(None, None, str(new_target)))
curr_target_arch = spack.spec.ArchSpec(
(None, None, str(curr_target)))
if not new_target_arch.satisfies(curr_target_arch):
# new_target is an incorrect guess based on preferences
# and/or default
valid_target_ranges = str(curr_target).split(',')
for target_range in valid_target_ranges:
t_min, t_sep, t_max = target_range.partition(':')
if not t_sep:
new_target = t_min
break
elif t_max:
new_target = t_max
break
elif t_min:
# TODO: something better than picking first
new_target = t_min
break
# Construct new architecture, compute whether spec changed
arch_spec = (str(new_plat), str(new_os), str(new_target))
new_arch = spack.spec.ArchSpec(arch_spec)
spec_changed = new_arch != spec.architecture
spec.architecture = new_arch
return spec_changed
def concretize_architecture(self, spec):
"""If the spec is empty provide the defaults of the platform. If the
architecture is not a string type, then check if either the platform,
target or operating system are concretized. If any of the fields are
changed then return True. If everything is concretized (i.e the
architecture attribute is a namedtuple of classes) then return False.
If the target is a string type, then convert the string into a
concretized architecture. If it has no architecture and the root of the
DAG has an architecture, then use the root otherwise use the defaults
on the platform.
"""
# ensure type safety for the architecture
if spec.architecture is None:
spec.architecture = spack.spec.ArchSpec()
if spec.architecture.platform and \
(spec.architecture.os and spec.architecture.target):
return False
# Get platform of nearest spec with a platform, including spec
# If spec has a platform, easy
if spec.architecture.platform:
new_plat = spack.architecture.get_platform(
spec.architecture.platform)
else:
# Else if anyone else has a platform, take the closest one
# Search up, then down, along build/link deps first
# Then any nearest. Algorithm from compilerspec search
platform_spec = find_spec(
spec, lambda x: x.architecture and x.architecture.platform)
if platform_spec:
new_plat = spack.architecture.get_platform(
platform_spec.architecture.platform)
else:
# If no platform anywhere in this spec, grab the default
new_plat = spack.architecture.platform()
# Get nearest spec with relevant platform and an os
# Generally, same algorithm as finding platform, except we only
# consider specs that have a platform
if spec.architecture.os:
new_os = spec.architecture.os
else:
new_os_spec = find_spec(
spec, lambda x: (x.architecture and x.architecture.platform ==
str(new_plat) and x.architecture.os))
if new_os_spec:
new_os = new_os_spec.architecture.os
else:
new_os = new_plat.operating_system('default_os')
# Get the nearest spec with relevant platform and a target
# Generally, same algorithm as finding os
if spec.architecture.target:
new_target = spec.architecture.target
else:
new_target_spec = find_spec(
spec, lambda x: (x.architecture and x.architecture.platform ==
str(new_plat) and x.architecture.target))
if new_target_spec:
new_target = new_target_spec.architecture.target
else:
# To get default platform, consider package prefs
if PackagePrefs.has_preferred_targets(spec.name):
new_target = self.target_from_package_preferences(spec)
else:
new_target = new_plat.target('default_target')
# Construct new architecture, compute whether spec changed
arch_spec = (str(new_plat), str(new_os), str(new_target))
new_arch = spack.spec.ArchSpec(arch_spec)
spec_changed = new_arch != spec.architecture
spec.architecture = new_arch
return spec_changed