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pynvml.py
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#####
# Copyright (c) 2011-2015, NVIDIA Corporation. All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions are met:
#
# * Redistributions of source code must retain the above copyright notice,
# this list of conditions and the following disclaimer.
# * Redistributions in binary form must reproduce the above copyright
# notice, this list of conditions and the following disclaimer in the
# documentation and/or other materials provided with the distribution.
# * Neither the name of the NVIDIA Corporation nor the names of its
# contributors may be used to endorse or promote products derived from
# this software without specific prior written permission.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
# AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
# ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
# LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
# CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
# SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
# INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
# CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
# ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
# THE POSSIBILITY OF SUCH DAMAGE.
#####
##
# Python bindings for the NVML library
##
from ctypes import *
from ctypes.util import find_library
import sys
import os
import threading
import string
## C Type mappings ##
## Enums
_nvmlEnableState_t = c_uint
NVML_FEATURE_DISABLED = 0
NVML_FEATURE_ENABLED = 1
_nvmlBrandType_t = c_uint
NVML_BRAND_UNKNOWN = 0
NVML_BRAND_QUADRO = 1
NVML_BRAND_TESLA = 2
NVML_BRAND_NVS = 3
NVML_BRAND_GRID = 4
NVML_BRAND_GEFORCE = 5
NVML_BRAND_COUNT = 6
_nvmlTemperatureThresholds_t = c_uint
NVML_TEMPERATURE_THRESHOLD_SHUTDOWN = 0
NVML_TEMPERATURE_THRESHOLD_SLOWDOWN = 1
NVML_TEMPERATURE_THRESHOLD_COUNT = 1
_nvmlTemperatureSensors_t = c_uint
NVML_TEMPERATURE_GPU = 0
NVML_TEMPERATURE_COUNT = 1
_nvmlComputeMode_t = c_uint
NVML_COMPUTEMODE_DEFAULT = 0
NVML_COMPUTEMODE_EXCLUSIVE_THREAD = 1
NVML_COMPUTEMODE_PROHIBITED = 2
NVML_COMPUTEMODE_EXCLUSIVE_PROCESS = 3
NVML_COMPUTEMODE_COUNT = 4
_nvmlMemoryLocation_t = c_uint
NVML_MEMORY_LOCATION_L1_CACHE = 0
NVML_MEMORY_LOCATION_L2_CACHE = 1
NVML_MEMORY_LOCATION_DEVICE_MEMORY = 2
NVML_MEMORY_LOCATION_REGISTER_FILE = 3
NVML_MEMORY_LOCATION_TEXTURE_MEMORY = 4
NVML_MEMORY_LOCATION_COUNT = 5
# These are deprecated, instead use _nvmlMemoryErrorType_t
_nvmlEccBitType_t = c_uint
NVML_SINGLE_BIT_ECC = 0
NVML_DOUBLE_BIT_ECC = 1
NVML_ECC_ERROR_TYPE_COUNT = 2
_nvmlEccCounterType_t = c_uint
NVML_VOLATILE_ECC = 0
NVML_AGGREGATE_ECC = 1
NVML_ECC_COUNTER_TYPE_COUNT = 2
_nvmlMemoryErrorType_t = c_uint
NVML_MEMORY_ERROR_TYPE_CORRECTED = 0
NVML_MEMORY_ERROR_TYPE_UNCORRECTED = 1
NVML_MEMORY_ERROR_TYPE_COUNT = 2
_nvmlClockType_t = c_uint
NVML_CLOCK_GRAPHICS = 0
NVML_CLOCK_SM = 1
NVML_CLOCK_MEM = 2
NVML_CLOCK_COUNT = 3
_nvmlDriverModel_t = c_uint
NVML_DRIVER_WDDM = 0
NVML_DRIVER_WDM = 1
_nvmlPstates_t = c_uint
NVML_PSTATE_0 = 0
NVML_PSTATE_1 = 1
NVML_PSTATE_2 = 2
NVML_PSTATE_3 = 3
NVML_PSTATE_4 = 4
NVML_PSTATE_5 = 5
NVML_PSTATE_6 = 6
NVML_PSTATE_7 = 7
NVML_PSTATE_8 = 8
NVML_PSTATE_9 = 9
NVML_PSTATE_10 = 10
NVML_PSTATE_11 = 11
NVML_PSTATE_12 = 12
NVML_PSTATE_13 = 13
NVML_PSTATE_14 = 14
NVML_PSTATE_15 = 15
NVML_PSTATE_UNKNOWN = 32
_nvmlInforomObject_t = c_uint
NVML_INFOROM_OEM = 0
NVML_INFOROM_ECC = 1
NVML_INFOROM_POWER = 2
NVML_INFOROM_COUNT = 3
_nvmlReturn_t = c_uint
NVML_SUCCESS = 0
NVML_ERROR_UNINITIALIZED = 1
NVML_ERROR_INVALID_ARGUMENT = 2
NVML_ERROR_NOT_SUPPORTED = 3
NVML_ERROR_NO_PERMISSION = 4
NVML_ERROR_ALREADY_INITIALIZED = 5
NVML_ERROR_NOT_FOUND = 6
NVML_ERROR_INSUFFICIENT_SIZE = 7
NVML_ERROR_INSUFFICIENT_POWER = 8
NVML_ERROR_DRIVER_NOT_LOADED = 9
NVML_ERROR_TIMEOUT = 10
NVML_ERROR_IRQ_ISSUE = 11
NVML_ERROR_LIBRARY_NOT_FOUND = 12
NVML_ERROR_FUNCTION_NOT_FOUND = 13
NVML_ERROR_CORRUPTED_INFOROM = 14
NVML_ERROR_GPU_IS_LOST = 15
NVML_ERROR_RESET_REQUIRED = 16
NVML_ERROR_OPERATING_SYSTEM = 17
NVML_ERROR_LIB_RM_VERSION_MISMATCH = 18
NVML_ERROR_UNKNOWN = 999
_nvmlFanState_t = c_uint
NVML_FAN_NORMAL = 0
NVML_FAN_FAILED = 1
_nvmlLedColor_t = c_uint
NVML_LED_COLOR_GREEN = 0
NVML_LED_COLOR_AMBER = 1
_nvmlGpuOperationMode_t = c_uint
NVML_GOM_ALL_ON = 0
NVML_GOM_COMPUTE = 1
NVML_GOM_LOW_DP = 2
_nvmlPageRetirementCause_t = c_uint
NVML_PAGE_RETIREMENT_CAUSE_DOUBLE_BIT_ECC_ERROR = 0
NVML_PAGE_RETIREMENT_CAUSE_MULTIPLE_SINGLE_BIT_ECC_ERRORS = 1
NVML_PAGE_RETIREMENT_CAUSE_COUNT = 2
_nvmlRestrictedAPI_t = c_uint
NVML_RESTRICTED_API_SET_APPLICATION_CLOCKS = 0
NVML_RESTRICTED_API_SET_AUTO_BOOSTED_CLOCKS = 1
NVML_RESTRICTED_API_COUNT = 2
_nvmlBridgeChipType_t = c_uint
NVML_BRIDGE_CHIP_PLX = 0
NVML_BRIDGE_CHIP_BRO4 = 1
NVML_MAX_PHYSICAL_BRIDGE = 128
_nvmlValueType_t = c_uint
NVML_VALUE_TYPE_DOUBLE = 0
NVML_VALUE_TYPE_UNSIGNED_INT = 1
NVML_VALUE_TYPE_UNSIGNED_LONG = 2
NVML_VALUE_TYPE_UNSIGNED_LONG_LONG = 3
NVML_VALUE_TYPE_COUNT = 4
_nvmlPerfPolicyType_t = c_uint
NVML_PERF_POLICY_POWER = 0
NVML_PERF_POLICY_THERMAL = 1
NVML_PERF_POLICY_COUNT = 2
_nvmlSamplingType_t = c_uint
NVML_TOTAL_POWER_SAMPLES = 0
NVML_GPU_UTILIZATION_SAMPLES = 1
NVML_MEMORY_UTILIZATION_SAMPLES = 2
NVML_ENC_UTILIZATION_SAMPLES = 3
NVML_DEC_UTILIZATION_SAMPLES = 4
NVML_PROCESSOR_CLK_SAMPLES = 5
NVML_MEMORY_CLK_SAMPLES = 6
NVML_SAMPLINGTYPE_COUNT = 7
_nvmlPcieUtilCounter_t = c_uint
NVML_PCIE_UTIL_TX_BYTES = 0
NVML_PCIE_UTIL_RX_BYTES = 1
NVML_PCIE_UTIL_COUNT = 2
_nvmlGpuTopologyLevel_t = c_uint
NVML_TOPOLOGY_INTERNAL = 0
NVML_TOPOLOGY_SINGLE = 10
NVML_TOPOLOGY_MULTIPLE = 20
NVML_TOPOLOGY_HOSTBRIDGE = 30
NVML_TOPOLOGY_CPU = 40
NVML_TOPOLOGY_SYSTEM = 50
# C preprocessor defined values
nvmlFlagDefault = 0
nvmlFlagForce = 1
# buffer size
NVML_DEVICE_INFOROM_VERSION_BUFFER_SIZE = 16
NVML_DEVICE_UUID_BUFFER_SIZE = 80
NVML_SYSTEM_DRIVER_VERSION_BUFFER_SIZE = 81
NVML_SYSTEM_NVML_VERSION_BUFFER_SIZE = 80
NVML_DEVICE_NAME_BUFFER_SIZE = 64
NVML_DEVICE_SERIAL_BUFFER_SIZE = 30
NVML_DEVICE_VBIOS_VERSION_BUFFER_SIZE = 32
NVML_DEVICE_PCI_BUS_ID_BUFFER_SIZE = 16
NVML_VALUE_NOT_AVAILABLE_ulonglong = c_ulonglong(-1)
NVML_VALUE_NOT_AVAILABLE_uint = c_uint(-1)
## Lib loading ##
nvmlLib = None
libLoadLock = threading.Lock()
_nvmlLib_refcount = 0 # Incremented on each nvmlInit and decremented on nvmlShutdown
## Error Checking ##
class NVMLError(Exception):
_valClassMapping = dict()
# List of currently known error codes
_errcode_to_string = {
NVML_ERROR_UNINITIALIZED: "Uninitialized",
NVML_ERROR_INVALID_ARGUMENT: "Invalid Argument",
NVML_ERROR_NOT_SUPPORTED: "Not Supported",
NVML_ERROR_NO_PERMISSION: "Insufficient Permissions",
NVML_ERROR_ALREADY_INITIALIZED: "Already Initialized",
NVML_ERROR_NOT_FOUND: "Not Found",
NVML_ERROR_INSUFFICIENT_SIZE: "Insufficient Size",
NVML_ERROR_INSUFFICIENT_POWER: "Insufficient External Power",
NVML_ERROR_DRIVER_NOT_LOADED: "Driver Not Loaded",
NVML_ERROR_TIMEOUT: "Timeout",
NVML_ERROR_IRQ_ISSUE: "Interrupt Request Issue",
NVML_ERROR_LIBRARY_NOT_FOUND: "NVML Shared Library Not Found",
NVML_ERROR_FUNCTION_NOT_FOUND: "Function Not Found",
NVML_ERROR_CORRUPTED_INFOROM: "Corrupted infoROM",
NVML_ERROR_GPU_IS_LOST: "GPU is lost",
NVML_ERROR_RESET_REQUIRED: "GPU requires restart",
NVML_ERROR_OPERATING_SYSTEM: "The operating system has blocked the request.",
NVML_ERROR_LIB_RM_VERSION_MISMATCH: "RM has detected an NVML/RM version mismatch.",
NVML_ERROR_UNKNOWN: "Unknown Error",
}
def __new__(typ, value):
'''
Maps value to a proper subclass of NVMLError.
See _extractNVMLErrorsAsClasses function for more details
'''
if typ == NVMLError:
typ = NVMLError._valClassMapping.get(value, typ)
obj = Exception.__new__(typ)
obj.value = value
return obj
def __str__(self):
try:
if self.value not in NVMLError._errcode_to_string:
NVMLError._errcode_to_string[self.value] = str(nvmlErrorString(self.value))
return NVMLError._errcode_to_string[self.value]
except NVMLError_Uninitialized:
return "NVML Error with code %d" % self.value
def __eq__(self, other):
return self.value == other.value
def _extractNVMLErrorsAsClasses():
'''
Generates a hierarchy of classes on top of NVMLError class.
Each NVML Error gets a new NVMLError subclass. This way try,except blocks can filter appropriate
exceptions more easily.
NVMLError is a parent class. Each NVML_ERROR_* gets it's own subclass.
e.g. NVML_ERROR_ALREADY_INITIALIZED will be turned into NVMLError_AlreadyInitialized
'''
this_module = sys.modules[__name__]
nvmlErrorsNames = filter(lambda x: x.startswith("NVML_ERROR_"), dir(this_module))
for err_name in nvmlErrorsNames:
# e.g. Turn NVML_ERROR_ALREADY_INITIALIZED into NVMLError_AlreadyInitialized
class_name = "NVMLError_" + string.capwords(err_name.replace("NVML_ERROR_", ""), "_").replace("_", "")
err_val = getattr(this_module, err_name)
def gen_new(val):
def new(typ):
obj = NVMLError.__new__(typ, val)
return obj
return new
new_error_class = type(class_name, (NVMLError,), {'__new__': gen_new(err_val)})
new_error_class.__module__ = __name__
setattr(this_module, class_name, new_error_class)
NVMLError._valClassMapping[err_val] = new_error_class
_extractNVMLErrorsAsClasses()
def _nvmlCheckReturn(ret):
if (ret != NVML_SUCCESS):
raise NVMLError(ret)
return ret
## Function access ##
_nvmlGetFunctionPointer_cache = dict() # function pointers are cached to prevent unnecessary libLoadLock locking
def _nvmlGetFunctionPointer(name):
global nvmlLib
if name in _nvmlGetFunctionPointer_cache:
return _nvmlGetFunctionPointer_cache[name]
libLoadLock.acquire()
try:
# ensure library was loaded
if (nvmlLib == None):
raise NVMLError(NVML_ERROR_UNINITIALIZED)
try:
_nvmlGetFunctionPointer_cache[name] = getattr(nvmlLib, name)
return _nvmlGetFunctionPointer_cache[name]
except AttributeError:
raise NVMLError(NVML_ERROR_FUNCTION_NOT_FOUND)
finally:
# lock is always freed
libLoadLock.release()
## Alternative object
# Allows the object to be printed
# Allows mismatched types to be assigned
# - like None when the Structure variant requires c_uint
class nvmlFriendlyObject(object):
def __init__(self, dictionary):
for x in dictionary:
setattr(self, x, dictionary[x])
def __str__(self):
return self.__dict__.__str__()
def nvmlStructToFriendlyObject(struct):
d = {}
for x in struct._fields_:
key = x[0]
value = getattr(struct, key)
d[key] = value
obj = nvmlFriendlyObject(d)
return obj
# pack the object so it can be passed to the NVML library
def nvmlFriendlyObjectToStruct(obj, model):
for x in model._fields_:
key = x[0]
value = obj.__dict__[key]
setattr(model, key, value)
return model
## Unit structures
class struct_c_nvmlUnit_t(Structure):
pass # opaque handle
c_nvmlUnit_t = POINTER(struct_c_nvmlUnit_t)
class _PrintableStructure(Structure):
"""
Abstract class that produces nicer __str__ output than ctypes.Structure.
e.g. instead of:
>>> print str(obj)
<class_name object at 0x7fdf82fef9e0>
this class will print
class_name(field_name: formatted_value, field_name: formatted_value)
_fmt_ dictionary of <str _field_ name> -> <str format>
e.g. class that has _field_ 'hex_value', c_uint could be formatted with
_fmt_ = {"hex_value" : "%08X"}
to produce nicer output.
Default fomratting string for all fields can be set with key "<default>" like:
_fmt_ = {"<default>" : "%d MHz"} # e.g all values are numbers in MHz.
If not set it's assumed to be just "%s"
Exact format of returned str from this class is subject to change in the future.
"""
_fmt_ = {}
def __str__(self):
result = []
for x in self._fields_:
key = x[0]
value = getattr(self, key)
fmt = "%s"
if key in self._fmt_:
fmt = self._fmt_[key]
elif "<default>" in self._fmt_:
fmt = self._fmt_["<default>"]
result.append(("%s: " + fmt) % (key, value))
return self.__class__.__name__ + "(" + string.join(result, ", ") + ")"
class c_nvmlUnitInfo_t(_PrintableStructure):
_fields_ = [
('name', c_char * 96),
('id', c_char * 96),
('serial', c_char * 96),
('firmwareVersion', c_char * 96),
]
class c_nvmlLedState_t(_PrintableStructure):
_fields_ = [
('cause', c_char * 256),
('color', _nvmlLedColor_t),
]
class c_nvmlPSUInfo_t(_PrintableStructure):
_fields_ = [
('state', c_char * 256),
('current', c_uint),
('voltage', c_uint),
('power', c_uint),
]
class c_nvmlUnitFanInfo_t(_PrintableStructure):
_fields_ = [
('speed', c_uint),
('state', _nvmlFanState_t),
]
class c_nvmlUnitFanSpeeds_t(_PrintableStructure):
_fields_ = [
('fans', c_nvmlUnitFanInfo_t * 24),
('count', c_uint)
]
## Device structures
class struct_c_nvmlDevice_t(Structure):
pass # opaque handle
c_nvmlDevice_t = POINTER(struct_c_nvmlDevice_t)
class nvmlPciInfo_t(_PrintableStructure):
_fields_ = [
('busId', c_char * 16),
('domain', c_uint),
('bus', c_uint),
('device', c_uint),
('pciDeviceId', c_uint),
# Added in 2.285
('pciSubSystemId', c_uint),
('reserved0', c_uint),
('reserved1', c_uint),
('reserved2', c_uint),
('reserved3', c_uint),
]
_fmt_ = {
'domain' : "0x%04X",
'bus' : "0x%02X",
'device' : "0x%02X",
'pciDeviceId' : "0x%08X",
'pciSubSystemId' : "0x%08X",
}
class c_nvmlMemory_t(_PrintableStructure):
_fields_ = [
('total', c_ulonglong),
('free', c_ulonglong),
('used', c_ulonglong),
]
_fmt_ = {'<default>': "%d B"}
class c_nvmlBAR1Memory_t(_PrintableStructure):
_fields_ = [
('bar1Total', c_ulonglong),
('bar1Free', c_ulonglong),
('bar1Used', c_ulonglong),
]
_fmt_ = {'<default>': "%d B"}
# On Windows with the WDDM driver, usedGpuMemory is reported as None
# Code that processes this structure should check for None, I.E.
#
# if (info.usedGpuMemory == None):
# # TODO handle the error
# pass
# else:
# print("Using %d MiB of memory" % (info.usedGpuMemory / 1024 / 1024))
#
# See NVML documentation for more information
class c_nvmlProcessInfo_t(_PrintableStructure):
_fields_ = [
('pid', c_uint),
('usedGpuMemory', c_ulonglong),
]
_fmt_ = {'usedGpuMemory': "%d B"}
class c_nvmlBridgeChipInfo_t(_PrintableStructure):
_fields_ = [
('type', _nvmlBridgeChipType_t),
('fwVersion', c_uint),
]
class c_nvmlBridgeChipHierarchy_t(_PrintableStructure):
_fields_ = [
('bridgeCount', c_uint),
('bridgeChipInfo', c_nvmlBridgeChipInfo_t * 128),
]
class c_nvmlEccErrorCounts_t(_PrintableStructure):
_fields_ = [
('l1Cache', c_ulonglong),
('l2Cache', c_ulonglong),
('deviceMemory', c_ulonglong),
('registerFile', c_ulonglong),
]
class c_nvmlUtilization_t(_PrintableStructure):
_fields_ = [
('gpu', c_uint),
('memory', c_uint),
]
_fmt_ = {'<default>': "%d %%"}
# Added in 2.285
class c_nvmlHwbcEntry_t(_PrintableStructure):
_fields_ = [
('hwbcId', c_uint),
('firmwareVersion', c_char * 32),
]
class c_nvmlValue_t(Union):
_fields_ = [
('dVal', c_double),
('uiVal', c_uint),
('ulVal', c_ulong),
('ullVal', c_ulonglong),
]
class c_nvmlSample_t(_PrintableStructure):
_fields_ = [
('timeStamp', c_ulonglong),
('sampleValue', c_nvmlValue_t),
]
class c_nvmlViolationTime_t(_PrintableStructure):
_fields_ = [
('referenceTime', c_ulonglong),
('violationTime', c_ulonglong),
]
## Event structures
class struct_c_nvmlEventSet_t(Structure):
pass # opaque handle
c_nvmlEventSet_t = POINTER(struct_c_nvmlEventSet_t)
nvmlEventTypeSingleBitEccError = 0x0000000000000001
nvmlEventTypeDoubleBitEccError = 0x0000000000000002
nvmlEventTypePState = 0x0000000000000004
nvmlEventTypeXidCriticalError = 0x0000000000000008
nvmlEventTypeClock = 0x0000000000000010
nvmlEventTypeNone = 0x0000000000000000
nvmlEventTypeAll = (
nvmlEventTypeNone |
nvmlEventTypeSingleBitEccError |
nvmlEventTypeDoubleBitEccError |
nvmlEventTypePState |
nvmlEventTypeClock |
nvmlEventTypeXidCriticalError
)
## Clock Throttle Reasons defines
nvmlClocksThrottleReasonGpuIdle = 0x0000000000000001
nvmlClocksThrottleReasonApplicationsClocksSetting = 0x0000000000000002
nvmlClocksThrottleReasonUserDefinedClocks = nvmlClocksThrottleReasonApplicationsClocksSetting # deprecated, use nvmlClocksThrottleReasonApplicationsClocksSetting
nvmlClocksThrottleReasonSwPowerCap = 0x0000000000000004
nvmlClocksThrottleReasonHwSlowdown = 0x0000000000000008
nvmlClocksThrottleReasonUnknown = 0x8000000000000000
nvmlClocksThrottleReasonNone = 0x0000000000000000
nvmlClocksThrottleReasonAll = (
nvmlClocksThrottleReasonNone |
nvmlClocksThrottleReasonGpuIdle |
nvmlClocksThrottleReasonApplicationsClocksSetting |
nvmlClocksThrottleReasonSwPowerCap |
nvmlClocksThrottleReasonHwSlowdown |
nvmlClocksThrottleReasonUnknown
)
class c_nvmlEventData_t(_PrintableStructure):
_fields_ = [
('device', c_nvmlDevice_t),
('eventType', c_ulonglong),
('eventData', c_ulonglong)
]
_fmt_ = {'eventType': "0x%08X"}
class c_nvmlAccountingStats_t(_PrintableStructure):
_fields_ = [
('gpuUtilization', c_uint),
('memoryUtilization', c_uint),
('maxMemoryUsage', c_ulonglong),
('time', c_ulonglong),
('startTime', c_ulonglong),
('isRunning', c_uint),
('reserved', c_uint * 5)
]
## C function wrappers ##
def nvmlInit():
_LoadNvmlLibrary()
#
# Initialize the library
#
fn = _nvmlGetFunctionPointer("nvmlInit_v2")
ret = fn()
_nvmlCheckReturn(ret)
# Atomically update refcount
global _nvmlLib_refcount
libLoadLock.acquire()
_nvmlLib_refcount += 1
libLoadLock.release()
return None
def _LoadNvmlLibrary():
'''
Load the library if it isn't loaded already
'''
global nvmlLib
if (nvmlLib == None):
# lock to ensure only one caller loads the library
libLoadLock.acquire()
try:
# ensure the library still isn't loaded
if (nvmlLib == None):
try:
if (sys.platform[:3] == "win"):
searchPaths = [
os.path.join(os.getenv("ProgramFiles", r"C:\Program Files"), r"NVIDIA Corporation\NVSMI\nvml.dll"),
os.path.join(os.getenv("WinDir", r"C:\Windows"), r"System32\nvml.dll"),
]
nvmlPath = next((x for x in searchPaths if os.path.isfile(x)), None)
if (nvmlPath == None):
_nvmlCheckReturn(NVML_ERROR_LIBRARY_NOT_FOUND)
else:
# cdecl calling convention
nvmlLib = CDLL(nvmlPath)
else:
# assume linux
nvmlLib = CDLL("libnvidia-ml.so.1")
except OSError as ose:
_nvmlCheckReturn(NVML_ERROR_LIBRARY_NOT_FOUND)
if (nvmlLib == None):
_nvmlCheckReturn(NVML_ERROR_LIBRARY_NOT_FOUND)
finally:
# lock is always freed
libLoadLock.release()
def nvmlShutdown():
#
# Leave the library loaded, but shutdown the interface
#
fn = _nvmlGetFunctionPointer("nvmlShutdown")
ret = fn()
_nvmlCheckReturn(ret)
# Atomically update refcount
global _nvmlLib_refcount
libLoadLock.acquire()
if (0 < _nvmlLib_refcount):
_nvmlLib_refcount -= 1
libLoadLock.release()
return None
# Added in 2.285
def nvmlErrorString(result):
fn = _nvmlGetFunctionPointer("nvmlErrorString")
fn.restype = c_char_p # otherwise return is an int
ret = fn(result)
return ret
# Added in 2.285
def nvmlSystemGetNVMLVersion():
c_version = create_string_buffer(NVML_SYSTEM_NVML_VERSION_BUFFER_SIZE)
fn = _nvmlGetFunctionPointer("nvmlSystemGetNVMLVersion")
ret = fn(c_version, c_uint(NVML_SYSTEM_NVML_VERSION_BUFFER_SIZE))
_nvmlCheckReturn(ret)
return c_version.value
# Added in 2.285
def nvmlSystemGetProcessName(pid):
c_name = create_string_buffer(1024)
fn = _nvmlGetFunctionPointer("nvmlSystemGetProcessName")
ret = fn(c_uint(pid), c_name, c_uint(1024))
_nvmlCheckReturn(ret)
return c_name.value
def nvmlSystemGetDriverVersion():
c_version = create_string_buffer(NVML_SYSTEM_DRIVER_VERSION_BUFFER_SIZE)
fn = _nvmlGetFunctionPointer("nvmlSystemGetDriverVersion")
ret = fn(c_version, c_uint(NVML_SYSTEM_DRIVER_VERSION_BUFFER_SIZE))
_nvmlCheckReturn(ret)
return c_version.value
# Added in 2.285
def nvmlSystemGetHicVersion():
c_count = c_uint(0)
hics = None
fn = _nvmlGetFunctionPointer("nvmlSystemGetHicVersion")
# get the count
ret = fn(byref(c_count), None)
# this should only fail with insufficient size
if ((ret != NVML_SUCCESS) and
(ret != NVML_ERROR_INSUFFICIENT_SIZE)):
raise NVMLError(ret)
# if there are no hics
if (c_count.value == 0):
return []
hic_array = c_nvmlHwbcEntry_t * c_count.value
hics = hic_array()
ret = fn(byref(c_count), hics)
_nvmlCheckReturn(ret)
return hics
## Unit get functions
def nvmlUnitGetCount():
c_count = c_uint()
fn = _nvmlGetFunctionPointer("nvmlUnitGetCount")
ret = fn(byref(c_count))
_nvmlCheckReturn(ret)
return c_count.value
def nvmlUnitGetHandleByIndex(index):
c_index = c_uint(index)
unit = c_nvmlUnit_t()
fn = _nvmlGetFunctionPointer("nvmlUnitGetHandleByIndex")
ret = fn(c_index, byref(unit))
_nvmlCheckReturn(ret)
return unit
def nvmlUnitGetUnitInfo(unit):
c_info = c_nvmlUnitInfo_t()
fn = _nvmlGetFunctionPointer("nvmlUnitGetUnitInfo")
ret = fn(unit, byref(c_info))
_nvmlCheckReturn(ret)
return c_info
def nvmlUnitGetLedState(unit):
c_state = c_nvmlLedState_t()
fn = _nvmlGetFunctionPointer("nvmlUnitGetLedState")
ret = fn(unit, byref(c_state))
_nvmlCheckReturn(ret)
return c_state
def nvmlUnitGetPsuInfo(unit):
c_info = c_nvmlPSUInfo_t()
fn = _nvmlGetFunctionPointer("nvmlUnitGetPsuInfo")
ret = fn(unit, byref(c_info))
_nvmlCheckReturn(ret)
return c_info
def nvmlUnitGetTemperature(unit, type):
c_temp = c_uint()
fn = _nvmlGetFunctionPointer("nvmlUnitGetTemperature")
ret = fn(unit, c_uint(type), byref(c_temp))
_nvmlCheckReturn(ret)
return c_temp.value
def nvmlUnitGetFanSpeedInfo(unit):
c_speeds = c_nvmlUnitFanSpeeds_t()
fn = _nvmlGetFunctionPointer("nvmlUnitGetFanSpeedInfo")
ret = fn(unit, byref(c_speeds))
_nvmlCheckReturn(ret)
return c_speeds
# added to API
def nvmlUnitGetDeviceCount(unit):
c_count = c_uint(0)
# query the unit to determine device count
fn = _nvmlGetFunctionPointer("nvmlUnitGetDevices")
ret = fn(unit, byref(c_count), None)
if (ret == NVML_ERROR_INSUFFICIENT_SIZE):
ret = NVML_SUCCESS
_nvmlCheckReturn(ret)
return c_count.value
def nvmlUnitGetDevices(unit):
c_count = c_uint(nvmlUnitGetDeviceCount(unit))
device_array = c_nvmlDevice_t * c_count.value
c_devices = device_array()
fn = _nvmlGetFunctionPointer("nvmlUnitGetDevices")
ret = fn(unit, byref(c_count), c_devices)
_nvmlCheckReturn(ret)
return c_devices
## Device get functions
def nvmlDeviceGetCount():
c_count = c_uint()
fn = _nvmlGetFunctionPointer("nvmlDeviceGetCount_v2")
ret = fn(byref(c_count))
_nvmlCheckReturn(ret)
return c_count.value
def nvmlDeviceGetHandleByIndex(index):
c_index = c_uint(index)
device = c_nvmlDevice_t()
fn = _nvmlGetFunctionPointer("nvmlDeviceGetHandleByIndex_v2")
ret = fn(c_index, byref(device))
_nvmlCheckReturn(ret)
return device
def nvmlDeviceGetHandleBySerial(serial):
c_serial = c_char_p(serial)
device = c_nvmlDevice_t()
fn = _nvmlGetFunctionPointer("nvmlDeviceGetHandleBySerial")
ret = fn(c_serial, byref(device))
_nvmlCheckReturn(ret)
return device
def nvmlDeviceGetHandleByUUID(uuid):
c_uuid = c_char_p(uuid)
device = c_nvmlDevice_t()
fn = _nvmlGetFunctionPointer("nvmlDeviceGetHandleByUUID")
ret = fn(c_uuid, byref(device))
_nvmlCheckReturn(ret)
return device
def nvmlDeviceGetHandleByPciBusId(pciBusId):
c_busId = c_char_p(pciBusId)
device = c_nvmlDevice_t()
fn = _nvmlGetFunctionPointer("nvmlDeviceGetHandleByPciBusId_v2")
ret = fn(c_busId, byref(device))
_nvmlCheckReturn(ret)
return device
def nvmlDeviceGetName(handle):
c_name = create_string_buffer(NVML_DEVICE_NAME_BUFFER_SIZE)
fn = _nvmlGetFunctionPointer("nvmlDeviceGetName")
ret = fn(handle, c_name, c_uint(NVML_DEVICE_NAME_BUFFER_SIZE))
_nvmlCheckReturn(ret)
return c_name.value
def nvmlDeviceGetBoardId(handle):
c_id = c_uint();
fn = _nvmlGetFunctionPointer("nvmlDeviceGetBoardId")
ret = fn(handle, byref(c_id))
_nvmlCheckReturn(ret)
return c_id.value
def nvmlDeviceGetMultiGpuBoard(handle):
c_multiGpu = c_uint();
fn = _nvmlGetFunctionPointer("nvmlDeviceGetMultiGpuBoard")
ret = fn(handle, byref(c_multiGpu))
_nvmlCheckReturn(ret)
return c_multiGpu.value
def nvmlDeviceGetBrand(handle):
c_type = _nvmlBrandType_t()
fn = _nvmlGetFunctionPointer("nvmlDeviceGetBrand")
ret = fn(handle, byref(c_type))
_nvmlCheckReturn(ret)
return c_type.value
def nvmlDeviceGetSerial(handle):
c_serial = create_string_buffer(NVML_DEVICE_SERIAL_BUFFER_SIZE)
fn = _nvmlGetFunctionPointer("nvmlDeviceGetSerial")
ret = fn(handle, c_serial, c_uint(NVML_DEVICE_SERIAL_BUFFER_SIZE))
_nvmlCheckReturn(ret)
return c_serial.value
def nvmlDeviceGetCpuAffinity(handle, cpuSetSize):
affinity_array = c_ulonglong * cpuSetSize
c_affinity = affinity_array()
fn = _nvmlGetFunctionPointer("nvmlDeviceGetCpuAffinity")
ret = fn(handle, cpuSetSize, byref(c_affinity))
_nvmlCheckReturn(ret)
return c_affinity
def nvmlDeviceSetCpuAffinity(handle):
fn = _nvmlGetFunctionPointer("nvmlDeviceSetCpuAffinity")
ret = fn(handle)
_nvmlCheckReturn(ret)
return None
def nvmlDeviceClearCpuAffinity(handle):
fn = _nvmlGetFunctionPointer("nvmlDeviceClearCpuAffinity")
ret = fn(handle)
_nvmlCheckReturn(ret)
return None
def nvmlDeviceGetMinorNumber(handle):
c_minor_number = c_uint()
fn = _nvmlGetFunctionPointer("nvmlDeviceGetMinorNumber")
ret = fn(handle, byref(c_minor_number))
_nvmlCheckReturn(ret)
return c_minor_number.value
def nvmlDeviceGetUUID(handle):
c_uuid = create_string_buffer(NVML_DEVICE_UUID_BUFFER_SIZE)
fn = _nvmlGetFunctionPointer("nvmlDeviceGetUUID")
ret = fn(handle, c_uuid, c_uint(NVML_DEVICE_UUID_BUFFER_SIZE))
_nvmlCheckReturn(ret)
return c_uuid.value
def nvmlDeviceGetInforomVersion(handle, infoRomObject):
c_version = create_string_buffer(NVML_DEVICE_INFOROM_VERSION_BUFFER_SIZE)
fn = _nvmlGetFunctionPointer("nvmlDeviceGetInforomVersion")
ret = fn(handle, _nvmlInforomObject_t(infoRomObject),
c_version, c_uint(NVML_DEVICE_INFOROM_VERSION_BUFFER_SIZE))
_nvmlCheckReturn(ret)
return c_version.value
# Added in 4.304
def nvmlDeviceGetInforomImageVersion(handle):
c_version = create_string_buffer(NVML_DEVICE_INFOROM_VERSION_BUFFER_SIZE)
fn = _nvmlGetFunctionPointer("nvmlDeviceGetInforomImageVersion")
ret = fn(handle, c_version, c_uint(NVML_DEVICE_INFOROM_VERSION_BUFFER_SIZE))
_nvmlCheckReturn(ret)
return c_version.value
# Added in 4.304
def nvmlDeviceGetInforomConfigurationChecksum(handle):
c_checksum = c_uint()
fn = _nvmlGetFunctionPointer("nvmlDeviceGetInforomConfigurationChecksum")
ret = fn(handle, byref(c_checksum))
_nvmlCheckReturn(ret)
return c_checksum.value
# Added in 4.304
def nvmlDeviceValidateInforom(handle):
fn = _nvmlGetFunctionPointer("nvmlDeviceValidateInforom")
ret = fn(handle)
_nvmlCheckReturn(ret)
return None
def nvmlDeviceGetDisplayMode(handle):
c_mode = _nvmlEnableState_t()
fn = _nvmlGetFunctionPointer("nvmlDeviceGetDisplayMode")
ret = fn(handle, byref(c_mode))
_nvmlCheckReturn(ret)
return c_mode.value
def nvmlDeviceGetDisplayActive(handle):
c_mode = _nvmlEnableState_t()
fn = _nvmlGetFunctionPointer("nvmlDeviceGetDisplayActive")
ret = fn(handle, byref(c_mode))
_nvmlCheckReturn(ret)
return c_mode.value
def nvmlDeviceGetPersistenceMode(handle):
c_state = _nvmlEnableState_t()
fn = _nvmlGetFunctionPointer("nvmlDeviceGetPersistenceMode")
ret = fn(handle, byref(c_state))
_nvmlCheckReturn(ret)
return c_state.value
def nvmlDeviceGetPciInfo(handle):
c_info = nvmlPciInfo_t()
fn = _nvmlGetFunctionPointer("nvmlDeviceGetPciInfo_v2")
ret = fn(handle, byref(c_info))
_nvmlCheckReturn(ret)
return c_info
def nvmlDeviceGetClockInfo(handle, type):
c_clock = c_uint()
fn = _nvmlGetFunctionPointer("nvmlDeviceGetClockInfo")
ret = fn(handle, _nvmlClockType_t(type), byref(c_clock))
_nvmlCheckReturn(ret)
return c_clock.value
# Added in 2.285
def nvmlDeviceGetMaxClockInfo(handle, type):
c_clock = c_uint()
fn = _nvmlGetFunctionPointer("nvmlDeviceGetMaxClockInfo")
ret = fn(handle, _nvmlClockType_t(type), byref(c_clock))
_nvmlCheckReturn(ret)
return c_clock.value
# Added in 4.304
def nvmlDeviceGetApplicationsClock(handle, type):
c_clock = c_uint()
fn = _nvmlGetFunctionPointer("nvmlDeviceGetApplicationsClock")
ret = fn(handle, _nvmlClockType_t(type), byref(c_clock))
_nvmlCheckReturn(ret)
return c_clock.value
# Added in 5.319
def nvmlDeviceGetDefaultApplicationsClock(handle, type):
c_clock = c_uint()
fn = _nvmlGetFunctionPointer("nvmlDeviceGetDefaultApplicationsClock")
ret = fn(handle, _nvmlClockType_t(type), byref(c_clock))
_nvmlCheckReturn(ret)
return c_clock.value