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import ctypes
import inspect
import os
import subprocess
import sys
import tempfile
import numpy as np
from numba.core.typing.templates import AbstractTemplate, ConcreteTemplate
from numba.core import (types, typing, utils, funcdesc, serialize, config,
compiler, sigutils)
from numba.core.compiler_lock import global_compiler_lock
import numba
from .cudadrv.devices import get_context
from .cudadrv import nvvm, driver
from .errors import missing_launch_config_msg, normalize_kernel_dimensions
from .api import get_current_device
from .args import wrap_arg
@global_compiler_lock
def compile_cuda(pyfunc, return_type, args, debug=False, inline=False):
# First compilation will trigger the initialization of the CUDA backend.
from .descriptor import CUDATargetDesc
typingctx = CUDATargetDesc.typingctx
targetctx = CUDATargetDesc.targetctx
# TODO handle debug flag
flags = compiler.Flags()
# Do not compile (generate native code), just lower (to LLVM)
flags.set('no_compile')
flags.set('no_cpython_wrapper')
flags.set('no_cfunc_wrapper')
if debug:
flags.set('debuginfo')
if inline:
flags.set('forceinline')
# Run compilation pipeline
cres = compiler.compile_extra(typingctx=typingctx,
targetctx=targetctx,
func=pyfunc,
args=args,
return_type=return_type,
flags=flags,
locals={})
library = cres.library
library.finalize()
return cres
@global_compiler_lock
def compile_kernel(pyfunc, args, link, debug=False, inline=False,
fastmath=False, extensions=[], max_registers=None, opt=True):
cres = compile_cuda(pyfunc, types.void, args, debug=debug, inline=inline)
fname = cres.fndesc.llvm_func_name
lib, kernel = cres.target_context.prepare_cuda_kernel(cres.library, fname,
cres.signature.args,
debug=debug)
cukern = _Kernel(llvm_module=lib._final_module,
name=kernel.name,
pretty_name=cres.fndesc.qualname,
argtypes=cres.signature.args,
type_annotation=cres.type_annotation,
link=link,
debug=debug,
opt=opt,
call_helper=cres.call_helper,
fastmath=fastmath,
extensions=extensions,
max_registers=max_registers)
return cukern
@global_compiler_lock
def compile_ptx(pyfunc, args, debug=False, device=False, fastmath=False,
cc=None, opt=True):
"""Compile a Python function to PTX for a given set of argument types.
:param pyfunc: The Python function to compile.
:param args: A tuple of argument types to compile for.
:param debug: Whether to include debug info in the generated PTX.
:type debug: bool
:param device: Whether to compile a device function. Defaults to ``False``,
to compile global kernel functions.
:type device: bool
:param fastmath: Whether to enable fast math flags (ftz=1, prec_sqrt=0,
prec_div=, and fma=1)
:type fastmath: bool
:param cc: Compute capability to compile for, as a tuple ``(MAJOR, MINOR)``.
Defaults to ``(5, 2)``.
:type cc: tuple
:param opt: Enable optimizations. Defaults to ``True``.
:type opt: bool
:return: (ptx, resty): The PTX code and inferred return type
:rtype: tuple
"""
cres = compile_cuda(pyfunc, None, args, debug=debug)
resty = cres.signature.return_type
if device:
llvm_module = cres.library._final_module
nvvm.fix_data_layout(llvm_module)
else:
fname = cres.fndesc.llvm_func_name
tgt = cres.target_context
lib, kernel = tgt.prepare_cuda_kernel(cres.library, fname,
cres.signature.args, debug=debug)
llvm_module = lib._final_module
options = {
'debug': debug,
'fastmath': fastmath,
}
cc = cc or config.CUDA_DEFAULT_PTX_CC
opt = 3 if opt else 0
arch = nvvm.get_arch_option(*cc)
llvmir = str(llvm_module)
ptx = nvvm.llvm_to_ptx(llvmir, opt=opt, arch=arch, **options)
return ptx.decode('utf-8'), resty
def compile_ptx_for_current_device(pyfunc, args, debug=False, device=False,
fastmath=False, opt=True):
"""Compile a Python function to PTX for a given set of argument types for
the current device's compute capabilility. This calls :func:`compile_ptx`
with an appropriate ``cc`` value for the current device."""
cc = get_current_device().compute_capability
return compile_ptx(pyfunc, args, debug=-debug, device=device,
fastmath=fastmath, cc=cc, opt=True)
def disassemble_cubin(cubin):
# nvdisasm only accepts input from a file, so we need to write out to a
# temp file and clean up afterwards.
fd = None
fname = None
try:
fd, fname = tempfile.mkstemp()
with open(fname, 'wb') as f:
f.write(cubin)
try:
cp = subprocess.run(['nvdisasm', fname], check=True,
stdout=subprocess.PIPE,
stderr=subprocess.PIPE)
except FileNotFoundError as e:
if e.filename == 'nvdisasm':
msg = ("nvdisasm is required for SASS inspection, and has not "
"been found.\n\nYou may need to install the CUDA "
"toolkit and ensure that it is available on your "
"PATH.\n")
raise RuntimeError(msg)
return cp.stdout.decode('utf-8')
finally:
if fd is not None:
os.close(fd)
if fname is not None:
os.unlink(fname)
class DeviceFunctionTemplate(serialize.ReduceMixin):
"""Unmaterialized device function
"""
def __init__(self, pyfunc, debug, inline, opt):
self.py_func = pyfunc
self.debug = debug
self.inline = inline
self.opt = opt
self._compileinfos = {}
name = getattr(pyfunc, '__name__', 'unknown')
self.__name__ = f"{name} <CUDA device function>".format(name)
def _reduce_states(self):
return dict(py_func=self.py_func, debug=self.debug, inline=self.inline)
@classmethod
def _rebuild(cls, py_func, debug, inline):
return compile_device_template(py_func, debug=debug, inline=inline)
def compile(self, args):
"""Compile the function for the given argument types.
Each signature is compiled once by caching the compiled function inside
this object.
Returns the `CompileResult`.
"""
if args not in self._compileinfos:
cres = compile_cuda(self.py_func, None, args, debug=self.debug,
inline=self.inline)
first_definition = not self._compileinfos
self._compileinfos[args] = cres
libs = [cres.library]
if first_definition:
# First definition
cres.target_context.insert_user_function(self, cres.fndesc,
libs)
else:
cres.target_context.add_user_function(self, cres.fndesc, libs)
else:
cres = self._compileinfos[args]
return cres
def inspect_llvm(self, args):
"""Returns the LLVM-IR text compiled for *args*.
Parameters
----------
args: tuple[Type]
Argument types.
Returns
-------
llvmir : str
"""
# Force a compilation to occur if none has yet - this can be needed if
# the user attempts to inspect LLVM IR or PTX before the function has
# been called for the given arguments from a jitted kernel.
self.compile(args)
cres = self._compileinfos[args]
mod = cres.library._final_module
return str(mod)
def inspect_ptx(self, args, nvvm_options={}):
"""Returns the PTX compiled for *args* for the currently active GPU
Parameters
----------
args: tuple[Type]
Argument types.
nvvm_options : dict; optional
See `CompilationUnit.compile` in `numba/cuda/cudadrv/nvvm.py`.
Returns
-------
ptx : bytes
"""
llvmir = self.inspect_llvm(args)
# Make PTX
cuctx = get_context()
device = cuctx.device
cc = device.compute_capability
arch = nvvm.get_arch_option(*cc)
opt = 3 if self.opt else 0
ptx = nvvm.llvm_to_ptx(llvmir, opt=opt, arch=arch, **nvvm_options)
return ptx
def compile_device_template(pyfunc, debug=False, inline=False, opt=True):
"""Create a DeviceFunctionTemplate object and register the object to
the CUDA typing context.
"""
from .descriptor import CUDATargetDesc
dft = DeviceFunctionTemplate(pyfunc, debug=debug, inline=inline, opt=opt)
class device_function_template(AbstractTemplate):
key = dft
def generic(self, args, kws):
assert not kws
return dft.compile(args).signature
def get_template_info(cls):
basepath = os.path.dirname(os.path.dirname(numba.__file__))
code, firstlineno = inspect.getsourcelines(pyfunc)
path = inspect.getsourcefile(pyfunc)
sig = str(utils.pysignature(pyfunc))
info = {
'kind': "overload",
'name': getattr(cls.key, '__name__', "unknown"),
'sig': sig,
'filename': utils.safe_relpath(path, start=basepath),
'lines': (firstlineno, firstlineno + len(code) - 1),
'docstring': pyfunc.__doc__
}
return info
typingctx = CUDATargetDesc.typingctx
typingctx.insert_user_function(dft, device_function_template)
return dft
def compile_device(pyfunc, return_type, args, inline=True, debug=False):
return DeviceFunction(pyfunc, return_type, args, inline=True, debug=False)
def declare_device_function(name, restype, argtypes):
from .descriptor import CUDATargetDesc
typingctx = CUDATargetDesc.typingctx
targetctx = CUDATargetDesc.targetctx
sig = typing.signature(restype, *argtypes)
extfn = ExternFunction(name, sig)
class device_function_template(ConcreteTemplate):
key = extfn
cases = [sig]
fndesc = funcdesc.ExternalFunctionDescriptor(
name=name, restype=restype, argtypes=argtypes)
typingctx.insert_user_function(extfn, device_function_template)
targetctx.insert_user_function(extfn, fndesc)
return extfn
class DeviceFunction(serialize.ReduceMixin):
def __init__(self, pyfunc, return_type, args, inline, debug):
self.py_func = pyfunc
self.return_type = return_type
self.args = args
self.inline = True
self.debug = False
cres = compile_cuda(self.py_func, self.return_type, self.args,
debug=self.debug, inline=self.inline)
self.cres = cres
class device_function_template(ConcreteTemplate):
key = self
cases = [cres.signature]
cres.typing_context.insert_user_function(
self, device_function_template)
cres.target_context.insert_user_function(self, cres.fndesc,
[cres.library])
def _reduce_states(self):
return dict(py_func=self.py_func, return_type=self.return_type,
args=self.args, inline=self.inline, debug=self.debug)
@classmethod
def _rebuild(cls, py_func, return_type, args, inline, debug):
return cls(py_func, return_type, args, inline, debug)
def __repr__(self):
fmt = "<DeviceFunction py_func={0} signature={1}>"
return fmt.format(self.py_func, self.cres.signature)
class ExternFunction(object):
def __init__(self, name, sig):
self.name = name
self.sig = sig
class ForAll(object):
def __init__(self, kernel, ntasks, tpb, stream, sharedmem):
if ntasks < 0:
raise ValueError("Can't create ForAll with negative task count: %s"
% ntasks)
self.kernel = kernel
self.ntasks = ntasks
self.thread_per_block = tpb
self.stream = stream
self.sharedmem = sharedmem
def __call__(self, *args):
if self.ntasks == 0:
return
if self.kernel.specialized:
kernel = self.kernel
else:
kernel = self.kernel.specialize(*args)
blockdim = self._compute_thread_per_block(kernel)
griddim = (self.ntasks + blockdim - 1) // blockdim
return kernel[griddim, blockdim, self.stream, self.sharedmem](*args)
def _compute_thread_per_block(self, kernel):
tpb = self.thread_per_block
# Prefer user-specified config
if tpb != 0:
return tpb
# Else, ask the driver to give a good config
else:
ctx = get_context()
kwargs = dict(
func=kernel._func.get(),
b2d_func=0, # dynamic-shared memory is constant to blksz
memsize=self.sharedmem,
blocksizelimit=1024,
)
_, tpb = ctx.get_max_potential_block_size(**kwargs)
return tpb
class CachedPTX(object):
"""A PTX cache that uses compute capability as a cache key
"""
def __init__(self, name, llvmir, options):
self.name = name
self.llvmir = llvmir
self.cache = {}
self._extra_options = options.copy()
def get(self):
"""
Get PTX for the current active context.
"""
cuctx = get_context()
device = cuctx.device
cc = device.compute_capability
ptx = self.cache.get(cc)
if ptx is None:
arch = nvvm.get_arch_option(*cc)
ptx = nvvm.llvm_to_ptx(self.llvmir, arch=arch,
**self._extra_options)
self.cache[cc] = ptx
if config.DUMP_ASSEMBLY:
print(("ASSEMBLY %s" % self.name).center(80, '-'))
print(ptx.decode('utf-8'))
print('=' * 80)
return ptx
class CachedCUFunction(serialize.ReduceMixin):
"""
Get or compile CUDA function for the current active context
Uses device ID as key for cache.
"""
def __init__(self, entry_name, ptx, linking, max_registers):
self.entry_name = entry_name
self.ptx = ptx
self.linking = linking
self.cache = {}
self.ccinfos = {}
self.cubins = {}
self.max_registers = max_registers
def get(self):
cuctx = get_context()
device = cuctx.device
cufunc = self.cache.get(device.id)
if cufunc is None:
ptx = self.ptx.get()
# Link
linker = driver.Linker(max_registers=self.max_registers)
linker.add_ptx(ptx)
for path in self.linking:
linker.add_file_guess_ext(path)
cubin, size = linker.complete()
compile_info = linker.info_log
module = cuctx.create_module_image(cubin)
# Load
cufunc = module.get_function(self.entry_name)
# Populate caches
self.cache[device.id] = cufunc
self.ccinfos[device.id] = compile_info
# We take a copy of the cubin because it's owned by the linker
cubin_ptr = ctypes.cast(cubin, ctypes.POINTER(ctypes.c_char))
cubin_data = np.ctypeslib.as_array(cubin_ptr, shape=(size,)).copy()
self.cubins[device.id] = cubin_data
return cufunc
def get_sass(self):
self.get() # trigger compilation
device = get_context().device
return disassemble_cubin(self.cubins[device.id])
def get_info(self):
self.get() # trigger compilation
cuctx = get_context()
device = cuctx.device
ci = self.ccinfos[device.id]
return ci
def _reduce_states(self):
"""
Reduce the instance for serialization.
Pre-compiled PTX code string is serialized inside the `ptx` (CachedPTX).
Loaded CUfunctions are discarded. They are recreated when unserialized.
"""
if self.linking:
msg = ('cannot pickle CUDA kernel function with additional '
'libraries to link against')
raise RuntimeError(msg)
return dict(entry_name=self.entry_name, ptx=self.ptx,
linking=self.linking, max_registers=self.max_registers)
@classmethod
def _rebuild(cls, entry_name, ptx, linking, max_registers):
"""
Rebuild an instance.
"""
return cls(entry_name, ptx, linking, max_registers)
class _Kernel(serialize.ReduceMixin):
'''
CUDA Kernel specialized for a given set of argument types. When called, this
object launches the kernel on the device.
'''
def __init__(self, llvm_module, name, pretty_name, argtypes, call_helper,
link=(), debug=False, fastmath=False, type_annotation=None,
extensions=[], max_registers=None, opt=True):
super().__init__()
# initialize CUfunction
options = {
'debug': debug,
'fastmath': fastmath,
'opt': 3 if opt else 0
}
ptx = CachedPTX(pretty_name, str(llvm_module), options=options)
cufunc = CachedCUFunction(name, ptx, link, max_registers)
# populate members
self.entry_name = name
self.argument_types = tuple(argtypes)
self.linking = tuple(link)
self._type_annotation = type_annotation
self._func = cufunc
self.debug = debug
self.call_helper = call_helper
self.extensions = list(extensions)
@classmethod
def _rebuild(cls, name, argtypes, cufunc, link, debug, call_helper,
extensions):
"""
Rebuild an instance.
"""
instance = cls.__new__(cls)
# invoke parent constructor
super(cls, instance).__init__()
# populate members
instance.entry_name = name
instance.argument_types = tuple(argtypes)
instance.linking = tuple(link)
instance._type_annotation = None
instance._func = cufunc
instance.debug = debug
instance.call_helper = call_helper
instance.extensions = extensions
return instance
def _reduce_states(self):
"""
Reduce the instance for serialization.
Compiled definitions are serialized in PTX form.
Type annotation are discarded.
Thread, block and shared memory configuration are serialized.
Stream information is discarded.
"""
return dict(name=self.entry_name, argtypes=self.argument_types,
cufunc=self._func, link=self.linking, debug=self.debug,
call_helper=self.call_helper, extensions=self.extensions)
def __call__(self, *args, **kwargs):
assert not kwargs
griddim, blockdim = normalize_kernel_dimensions(self.griddim,
self.blockdim)
self._kernel_call(args=args,
griddim=griddim,
blockdim=blockdim,
stream=self.stream,
sharedmem=self.sharedmem)
def bind(self):
"""
Force binding to current CUDA context
"""
self._func.get()
@property
def ptx(self):
'''
PTX code for this kernel.
'''
return self._func.ptx.get().decode('utf8')
@property
def device(self):
"""
Get current active context
"""
return get_current_device()
def inspect_llvm(self):
'''
Returns the LLVM IR for this kernel.
'''
return str(self._func.ptx.llvmir)
def inspect_asm(self):
'''
Returns the PTX code for this kernel.
'''
return self._func.ptx.get().decode('ascii')
def inspect_sass(self):
'''
Returns the SASS code for this kernel.
Requires nvdisasm to be available on the PATH.
'''
return self._func.get_sass()
def inspect_types(self, file=None):
'''
Produce a dump of the Python source of this function annotated with the
corresponding Numba IR and type information. The dump is written to
*file*, or *sys.stdout* if *file* is *None*.
'''
if self._type_annotation is None:
raise ValueError("Type annotation is not available")
if file is None:
file = sys.stdout
print("%s %s" % (self.entry_name, self.argument_types), file=file)
print('-' * 80, file=file)
print(self._type_annotation, file=file)
print('=' * 80, file=file)
def launch(self, args, griddim, blockdim, stream=0, sharedmem=0):
# Prepare kernel
cufunc = self._func.get()
if self.debug:
excname = cufunc.name + "__errcode__"
excmem, excsz = cufunc.module.get_global_symbol(excname)
assert excsz == ctypes.sizeof(ctypes.c_int)
excval = ctypes.c_int()
excmem.memset(0, stream=stream)
# Prepare arguments
retr = [] # hold functors for writeback
kernelargs = []
for t, v in zip(self.argument_types, args):
self._prepare_args(t, v, stream, retr, kernelargs)
stream_handle = stream and stream.handle or None
# Invoke kernel
driver.launch_kernel(cufunc.handle,
*griddim,
*blockdim,
sharedmem,
stream_handle,
kernelargs)
if self.debug:
driver.device_to_host(ctypes.addressof(excval), excmem, excsz)
if excval.value != 0:
# An error occurred
def load_symbol(name):
mem, sz = cufunc.module.get_global_symbol("%s__%s__" %
(cufunc.name,
name))
val = ctypes.c_int()
driver.device_to_host(ctypes.addressof(val), mem, sz)
return val.value
tid = [load_symbol("tid" + i) for i in 'zyx']
ctaid = [load_symbol("ctaid" + i) for i in 'zyx']
code = excval.value
exccls, exc_args, loc = self.call_helper.get_exception(code)
# Prefix the exception message with the source location
if loc is None:
locinfo = ''
else:
sym, filepath, lineno = loc
filepath = os.path.abspath(filepath)
locinfo = 'In function %r, file %s, line %s, ' % (sym,
filepath,
lineno,)
# Prefix the exception message with the thread position
prefix = "%stid=%s ctaid=%s" % (locinfo, tid, ctaid)
if exc_args:
exc_args = ("%s: %s" % (prefix, exc_args[0]),) + \
exc_args[1:]
else:
exc_args = prefix,
raise exccls(*exc_args)
# retrieve auto converted arrays
for wb in retr:
wb()
def _prepare_args(self, ty, val, stream, retr, kernelargs):
"""
Convert arguments to ctypes and append to kernelargs
"""
# map the arguments using any extension you've registered
for extension in reversed(self.extensions):
ty, val = extension.prepare_args(
ty,
val,
stream=stream,
retr=retr)
if isinstance(ty, types.Array):
devary = wrap_arg(val).to_device(retr, stream)
c_intp = ctypes.c_ssize_t
meminfo = ctypes.c_void_p(0)
parent = ctypes.c_void_p(0)
nitems = c_intp(devary.size)
itemsize = c_intp(devary.dtype.itemsize)
data = ctypes.c_void_p(driver.device_pointer(devary))
kernelargs.append(meminfo)
kernelargs.append(parent)
kernelargs.append(nitems)
kernelargs.append(itemsize)
kernelargs.append(data)
for ax in range(devary.ndim):
kernelargs.append(c_intp(devary.shape[ax]))
for ax in range(devary.ndim):
kernelargs.append(c_intp(devary.strides[ax]))
elif isinstance(ty, types.Integer):
cval = getattr(ctypes, "c_%s" % ty)(val)
kernelargs.append(cval)
elif ty == types.float64:
cval = ctypes.c_double(val)
kernelargs.append(cval)
elif ty == types.float32:
cval = ctypes.c_float(val)
kernelargs.append(cval)
elif ty == types.boolean:
cval = ctypes.c_uint8(int(val))
kernelargs.append(cval)
elif ty == types.complex64:
kernelargs.append(ctypes.c_float(val.real))
kernelargs.append(ctypes.c_float(val.imag))
elif ty == types.complex128:
kernelargs.append(ctypes.c_double(val.real))
kernelargs.append(ctypes.c_double(val.imag))
elif isinstance(ty, (types.NPDatetime, types.NPTimedelta)):
kernelargs.append(ctypes.c_int64(val.view(np.int64)))
elif isinstance(ty, types.Record):
devrec = wrap_arg(val).to_device(retr, stream)
kernelargs.append(devrec)
else:
raise NotImplementedError(ty, val)
class _KernelConfiguration:
def __init__(self, dispatcher, griddim, blockdim, stream, sharedmem):
self.dispatcher = dispatcher
self.griddim = griddim
self.blockdim = blockdim
self.stream = stream
self.sharedmem = sharedmem
def __call__(self, *args):
return self.dispatcher.call(args, self.griddim, self.blockdim,
self.stream, self.sharedmem)
class Dispatcher(serialize.ReduceMixin):
'''
CUDA Dispatcher object. When configured and called, the dispatcher will
specialize itself for the given arguments (if no suitable specialized
version already exists) & compute capability, and launch on the device
associated with the current context.
Dispatcher objects are not to be constructed by the user, but instead are
created using the :func:`numba.cuda.jit` decorator.
'''
def __init__(self, func, sigs, bind, targetoptions):
super().__init__()
self.py_func = func
self.sigs = []
self._bind = bind
self.link = targetoptions.pop('link', (),)
self._can_compile = True
# keyed by a `(compute capability, args)` tuple
self.definitions = {}
self.specializations = {}
self.targetoptions = targetoptions
# defensive copy
self.targetoptions['extensions'] = \
list(self.targetoptions.get('extensions', []))
from .descriptor import CUDATargetDesc
self.typingctx = CUDATargetDesc.typingctx
if sigs:
if len(sigs) > 1:
raise TypeError("Only one signature supported at present")
self.compile(sigs[0])
self._can_compile = False
def configure(self, griddim, blockdim, stream=0, sharedmem=0):
griddim, blockdim = normalize_kernel_dimensions(griddim, blockdim)
return _KernelConfiguration(self, griddim, blockdim, stream, sharedmem)
def __getitem__(self, args):
if len(args) not in [2, 3, 4]:
raise ValueError('must specify at least the griddim and blockdim')
return self.configure(*args)
def forall(self, ntasks, tpb=0, stream=0, sharedmem=0):
"""Returns a 1D-configured kernel for a given number of tasks.
This assumes that:
- the kernel maps the Global Thread ID ``cuda.grid(1)`` to tasks on a
1-1 basis.
- the kernel checks that the Global Thread ID is upper-bounded by
``ntasks``, and does nothing if it is not.
:param ntasks: The number of tasks.
:param tpb: The size of a block. An appropriate value is chosen if this
parameter is not supplied.
:param stream: The stream on which the configured kernel will be
launched.
:param sharedmem: The number of bytes of dynamic shared memory required
by the kernel.
:return: A configured kernel, ready to launch on a set of arguments."""
return ForAll(self, ntasks, tpb=tpb, stream=stream, sharedmem=sharedmem)
@property
def extensions(self):
'''
A list of objects that must have a `prepare_args` function. When a
specialized kernel is called, each argument will be passed through
to the `prepare_args` (from the last object in this list to the
first). The arguments to `prepare_args` are:
- `ty` the numba type of the argument
- `val` the argument value itself
- `stream` the CUDA stream used for the current call to the kernel
- `retr` a list of zero-arg functions that you may want to append
post-call cleanup work to.
The `prepare_args` function must return a tuple `(ty, val)`, which
will be passed in turn to the next right-most `extension`. After all
the extensions have been called, the resulting `(ty, val)` will be
passed into Numba's default argument marshalling logic.
'''
return self.targetoptions['extensions']
def __call__(self, *args, **kwargs):
# An attempt to launch an unconfigured kernel
raise ValueError(missing_launch_config_msg)
def call(self, args, griddim, blockdim, stream, sharedmem):
'''
Compile if necessary and invoke this kernel with *args*.
'''
if self.specialized:
kernel = self.definition
else:
argtypes = tuple([self.typingctx.resolve_argument_type(a)
for a in args])
kernel = self.compile(argtypes)
kernel.launch(args, griddim, blockdim, stream, sharedmem)
def specialize(self, *args):
'''
Create a new instance of this dispatcher specialized for the given
*args*.
'''
cc = get_current_device().compute_capability
argtypes = tuple(
[self.typingctx.resolve_argument_type(a) for a in args])
if self.specialized:
raise RuntimeError('Dispatcher already specialized')
specialization = self.specializations.get((cc, argtypes))
if specialization:
return specialization
targetoptions = self.targetoptions
targetoptions['link'] = self.link
specialization = Dispatcher(self.py_func, [types.void(*argtypes)],
self._bind, targetoptions)
self.specializations[cc, argtypes] = specialization
return specialization
def disable_compile(self, val=True):
self._can_compile = not val
@property
def specialized(self):
"""
True if the Dispatcher has been specialized.
"""
return len(self.sigs) == 1 and not self._can_compile
@property
def definition(self):
# There is a single definition only when the dispatcher has been
# specialized.
if not self.specialized:
raise ValueError("Dispatcher needs to be specialized to get the "
"single definition")
return next(iter(self.definitions.values()))
@property
def _func(self, signature=None, compute_capability=None):
cc = compute_capability or get_current_device().compute_capability
if signature is not None:
return self.definitions[(cc, signature)]._func
elif self.specialized:
return self.definition._func
else:
return {sig: defn._func for sig, defn in self.definitions.items()}
def compile(self, sig):
'''
Compile and bind to the current context a version of this kernel
specialized for the given signature.
'''
argtypes, return_type = sigutils.normalize_signature(sig)
assert return_type is None or return_type == types.none
cc = get_current_device().compute_capability
if self.specialized:
return self.definition
else:
kernel = self.definitions.get((cc, argtypes))
if kernel is None:
if not self._can_compile:
raise RuntimeError("Compilation disabled")
kernel = compile_kernel(self.py_func, argtypes,
link=self.link,
**self.targetoptions)
self.definitions[(cc, argtypes)] = kernel
if self._bind:
kernel.bind()
self.sigs.append(sig)
return kernel
def inspect_llvm(self, signature=None, compute_capability=None):
'''
Return the LLVM IR for all signatures encountered thus far, or the LLVM
IR for a specific signature and compute_capability if given. If the
dispatcher is specialized, the IR for the single specialization is
returned.
'''
cc = compute_capability or get_current_device().compute_capability
if signature is not None:
return self.definitions[(cc, signature)].inspect_llvm()
elif self.specialized:
return self.definition.inspect_llvm()
else:
return dict((sig, defn.inspect_llvm())
for sig, defn in self.definitions.items())
def inspect_asm(self, signature=None, compute_capability=None):
'''
Return the generated PTX assembly code for all signatures encountered
thus far, or the PTX assembly code for a specific signature and
compute_capability if given. If the dispatcher is specialized, the
assembly code for the single specialization is returned.
'''
cc = compute_capability or get_current_device().compute_capability
if signature is not None:
return self.definitions[(cc, signature)].inspect_asm()
elif self.specialized:
return self.definition.inspect_asm()
else:
return dict((sig, defn.inspect_asm())
for sig, defn in self.definitions.items())
def inspect_sass(self, signature=None, compute_capability=None):
'''
Return the generated SASS code for all signatures encountered thus
far, or the SASS code for a specific signature and compute_capability
if given.
Requires nvdisasm to be available on the PATH.
'''
cc = compute_capability or get_current_device().compute_capability
if signature is not None:
return self.definitions[(cc, signature)].inspect_sass()
elif self.specialized:
return self.definition.inspect_sass()
else:
return dict((sig, defn.inspect_sass())
for sig, defn in self.definitions.items())
def inspect_types(self, file=None):
'''
Produce a dump of the Python source of this function annotated with the
corresponding Numba IR and type information. The dump is written to
*file*, or *sys.stdout* if *file* is *None*.
'''
if file is None:
file = sys.stdout
if self.specialized:
self.definition.inspect_types(file=file)
else:
for _, defn in self.definitions.items():
defn.inspect_types(file=file)
@property
def ptx(self):
if self.specialized:
return self.definition.ptx
else:
return dict((sig, defn.ptx)
for sig, defn in self.definitions.items())
def bind(self):
for defn in self.definitions.values():
defn.bind()
@classmethod
def _rebuild(cls, py_func, sigs, bind, targetoptions):
"""
Rebuild an instance.
"""
instance = cls(py_func, sigs, bind, targetoptions)
return instance
def _reduce_states(self):
"""
Reduce the instance for serialization.
Compiled definitions are discarded.
"""
return dict(py_func=self.py_func, sigs=self.sigs, bind=self._bind,
targetoptions=self.targetoptions)
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