Je viens d'écrire un pur script Python qui fait certaines des choses dont vous semblez avoir besoin (j'en ai pris beaucoup dans le projet pystream). Il s'agit simplement d'un wrapper pour certaines fonctions de la bibliothèque d'exécution CUDA (elle utilise ctypes). Regardez la fonction main() pour voir l'exemple d'utilisation. Aussi, sachez que je viens de l'écrire, donc il est susceptible de contenir des bugs. Utiliser avec précaution.
#!/bin/bash
import sys
import platform
import ctypes
"""
cudart.py: used to access pars of the CUDA runtime library.
Most of this code was lifted from the pystream project (it's BSD licensed):
http://code.google.com/p/pystream
Note that this is likely to only work with CUDA 2.3
To extend to other versions, you may need to edit the DeviceProp Class
"""
cudaSuccess = 0
errorDict = {
1: 'MissingConfigurationError',
2: 'MemoryAllocationError',
3: 'InitializationError',
4: 'LaunchFailureError',
5: 'PriorLaunchFailureError',
6: 'LaunchTimeoutError',
7: 'LaunchOutOfResourcesError',
8: 'InvalidDeviceFunctionError',
9: 'InvalidConfigurationError',
10: 'InvalidDeviceError',
11: 'InvalidValueError',
12: 'InvalidPitchValueError',
13: 'InvalidSymbolError',
14: 'MapBufferObjectFailedError',
15: 'UnmapBufferObjectFailedError',
16: 'InvalidHostPointerError',
17: 'InvalidDevicePointerError',
18: 'InvalidTextureError',
19: 'InvalidTextureBindingError',
20: 'InvalidChannelDescriptorError',
21: 'InvalidMemcpyDirectionError',
22: 'AddressOfConstantError',
23: 'TextureFetchFailedError',
24: 'TextureNotBoundError',
25: 'SynchronizationError',
26: 'InvalidFilterSettingError',
27: 'InvalidNormSettingError',
28: 'MixedDeviceExecutionError',
29: 'CudartUnloadingError',
30: 'UnknownError',
31: 'NotYetImplementedError',
32: 'MemoryValueTooLargeError',
33: 'InvalidResourceHandleError',
34: 'NotReadyError',
0x7f: 'StartupFailureError',
10000: 'ApiFailureBaseError'}
try:
if platform.system() == "Microsoft":
_libcudart = ctypes.windll.LoadLibrary('cudart.dll')
elif platform.system()=="Darwin":
_libcudart = ctypes.cdll.LoadLibrary('libcudart.dylib')
else:
_libcudart = ctypes.cdll.LoadLibrary('libcudart.so')
_libcudart_error = None
except OSError, e:
_libcudart_error = e
_libcudart = None
def _checkCudaStatus(status):
if status != cudaSuccess:
eClassString = errorDict[status]
# Get the class by name from the top level of this module
eClass = globals()[eClassString]
raise eClass()
def _checkDeviceNumber(device):
assert isinstance(device, int), "device number must be an int"
assert device >= 0, "device number must be greater than 0"
assert device < 2**8-1, "device number must be < 255"
# cudaDeviceProp
class DeviceProp(ctypes.Structure):
_fields_ = [
("name", 256*ctypes.c_char), # < ASCII string identifying device
("totalGlobalMem", ctypes.c_size_t), # < Global memory available on device in bytes
("sharedMemPerBlock", ctypes.c_size_t), # < Shared memory available per block in bytes
("regsPerBlock", ctypes.c_int), # < 32-bit registers available per block
("warpSize", ctypes.c_int), # < Warp size in threads
("memPitch", ctypes.c_size_t), # < Maximum pitch in bytes allowed by memory copies
("maxThreadsPerBlock", ctypes.c_int), # < Maximum number of threads per block
("maxThreadsDim", 3*ctypes.c_int), # < Maximum size of each dimension of a block
("maxGridSize", 3*ctypes.c_int), # < Maximum size of each dimension of a grid
("clockRate", ctypes.c_int), # < Clock frequency in kilohertz
("totalConstMem", ctypes.c_size_t), # < Constant memory available on device in bytes
("major", ctypes.c_int), # < Major compute capability
("minor", ctypes.c_int), # < Minor compute capability
("textureAlignment", ctypes.c_size_t), # < Alignment requirement for textures
("deviceOverlap", ctypes.c_int), # < Device can concurrently copy memory and execute a kernel
("multiProcessorCount", ctypes.c_int), # < Number of multiprocessors on device
("kernelExecTimeoutEnabled", ctypes.c_int), # < Specified whether there is a run time limit on kernels
("integrated", ctypes.c_int), # < Device is integrated as opposed to discrete
("canMapHostMemory", ctypes.c_int), # < Device can map host memory with cudaHostAlloc/cudaHostGetDevicePointer
("computeMode", ctypes.c_int), # < Compute mode (See ::cudaComputeMode)
("__cudaReserved", 36*ctypes.c_int),
]
def __str__(self):
return """NVidia GPU Specifications:
Name: %s
Total global mem: %i
Shared mem per block: %i
Registers per block: %i
Warp size: %i
Mem pitch: %i
Max threads per block: %i
Max treads dim: (%i, %i, %i)
Max grid size: (%i, %i, %i)
Total const mem: %i
Compute capability: %i.%i
Clock Rate (GHz): %f
Texture alignment: %i
""" % (self.name, self.totalGlobalMem, self.sharedMemPerBlock,
self.regsPerBlock, self.warpSize, self.memPitch,
self.maxThreadsPerBlock,
self.maxThreadsDim[0], self.maxThreadsDim[1], self.maxThreadsDim[2],
self.maxGridSize[0], self.maxGridSize[1], self.maxGridSize[2],
self.totalConstMem, self.major, self.minor,
float(self.clockRate)/1.0e6, self.textureAlignment)
def cudaGetDeviceCount():
if _libcudart is None: return 0
deviceCount = ctypes.c_int()
status = _libcudart.cudaGetDeviceCount(ctypes.byref(deviceCount))
_checkCudaStatus(status)
return deviceCount.value
def getDeviceProperties(device):
if _libcudart is None: return None
_checkDeviceNumber(device)
props = DeviceProp()
status = _libcudart.cudaGetDeviceProperties(ctypes.byref(props), device)
_checkCudaStatus(status)
return props
def getDriverVersion():
if _libcudart is None: return None
version = ctypes.c_int()
_libcudart.cudaDriverGetVersion(ctypes.byref(version))
v = "%d.%d" % (version.value//1000,
version.value%100)
return v
def getRuntimeVersion():
if _libcudart is None: return None
version = ctypes.c_int()
_libcudart.cudaRuntimeGetVersion(ctypes.byref(version))
v = "%d.%d" % (version.value//1000,
version.value%100)
return v
def getGpuCount():
count=0
for ii in range(cudaGetDeviceCount()):
props = getDeviceProperties(ii)
if props.major!=9999: count+=1
return count
def getLoadError():
return _libcudart_error
version = getDriverVersion()
if version is not None and not version.startswith('2.3'):
sys.stdout.write("WARNING: Driver version %s may not work with %s\n" %
(version, sys.argv[0]))
version = getRuntimeVersion()
if version is not None and not version.startswith('2.3'):
sys.stdout.write("WARNING: Runtime version %s may not work with %s\n" %
(version, sys.argv[0]))
def main():
sys.stdout.write("Driver version: %s\n" % getDriverVersion())
sys.stdout.write("Runtime version: %s\n" % getRuntimeVersion())
nn = cudaGetDeviceCount()
sys.stdout.write("Device count: %s\n" % nn)
for ii in range(nn):
props = getDeviceProperties(ii)
sys.stdout.write("\nDevice %d:\n" % ii)
#sys.stdout.write("%s" % props)
for f_name, f_type in props._fields_:
attr = props.__getattribute__(f_name)
sys.stdout.write(" %s: %s\n" % (f_name, attr))
gpuCount = getGpuCount()
if gpuCount > 0:
sys.stdout.write("\n")
sys.stdout.write("GPU count: %d\n" % getGpuCount())
e = getLoadError()
if e is not None:
sys.stdout.write("There was an error loading a library:\n%s\n\n" % e)
if __name__=="__main__":
main()
On peut éviter de maintenir et de compiler un programme séparé en utilisant à la place CMake pour exécuter un outil installé en même temps que le moteur d'exécution CUDA, comme nvidia-smi. Vois ma réponse. – mabraham