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| 1 | +# fbcotter/py3nvml |
| 2 | + |
| 3 | +Python 3 compatible bindings to the NVIDIA Management Library |
| 4 | + |
| 5 | +Origin python library can be found here |
| 6 | +[nvidia-ml-py](https://pypi.python.org/pypi/nvidia-ml-py/7.352.0). I have |
| 7 | +forked from version 7.352.0. |
| 8 | + |
| 9 | +This is an NVIDIA sponsored library, but it only works for python <= 2.5. This |
| 10 | +package was created from the NVIDIA library by running **2to3** on it, and |
| 11 | +making it pip importable. (Also changed the README from a .txt to a .md). |
| 12 | + |
| 13 | +## Info on NVIDIA Management Library |
| 14 | + |
| 15 | +Provides a Python interface to GPU management and monitoring functions. |
| 16 | + |
| 17 | +It is a wrapper around the NVML library. |
| 18 | + |
| 19 | +For information about the NVML library, see the NVML developer page |
| 20 | +http://developer.nvidia.com/nvidia-management-library-nvml |
| 21 | + |
| 22 | + |
| 23 | +## Requires |
| 24 | +-------- |
| 25 | +Python 3.5 or earlier |
| 26 | + |
| 27 | +## Installation |
| 28 | +Download and pip install from Git: |
| 29 | + |
| 30 | + $ git clone [email protected]:fbcotter/nvml.git |
| 31 | + $ cd py3nvml |
| 32 | + $ pip install . |
| 33 | + |
| 34 | + |
| 35 | +## Usage |
| 36 | + |
| 37 | + >>> from py3nvml.pynvml import * |
| 38 | + >>> nvmlInit() |
| 39 | + >>> print "Driver Version:", nvmlSystemGetDriverVersion() |
| 40 | + Driver Version: 352.00 |
| 41 | + >>> deviceCount = nvmlDeviceGetCount() |
| 42 | + >>> for i in range(deviceCount): |
| 43 | + ... handle = nvmlDeviceGetHandleByIndex(i) |
| 44 | + ... print("Device {}: {}".format(i, nvmlDeviceGetName(handle))) |
| 45 | + ... |
| 46 | + Device 0 : Tesla K40c |
| 47 | + |
| 48 | + >>> nvmlShutdown() |
| 49 | + |
| 50 | +Additionally, see py3nvml.nvidia_smi.py. A sample application that prints out |
| 51 | +the same as the command line: |
| 52 | + |
| 53 | + nvidia-smi -q -x |
| 54 | + |
| 55 | +## Functions |
| 56 | +Python methods wrap NVML functions, implemented in a C shared library. |
| 57 | +Each function's use is the same with the following exceptions: |
| 58 | + |
| 59 | +- Instead of returning error codes, failing error codes are raised as |
| 60 | + Python exceptions. |
| 61 | + |
| 62 | + ```python |
| 63 | + try: |
| 64 | + nvmlDeviceGetCount() |
| 65 | + except NVMLError as error: |
| 66 | + print error |
| 67 | + ``` |
| 68 | + Prints: |
| 69 | + ``` |
| 70 | + Uninitialized |
| 71 | + ``` |
| 72 | + |
| 73 | +- C function output parameters are returned from the corresponding |
| 74 | + Python function left to right. Eg the C function: |
| 75 | + |
| 76 | + ```C |
| 77 | + nvmlReturn_t nvmlDeviceGetEccMode(nvmlDevice_t device, |
| 78 | + nvmlEnableState_t *current, |
| 79 | + nvmlEnableState_t *pending); |
| 80 | + ``` |
| 81 | + Can be called like so: |
| 82 | + ```python |
| 83 | + >>> nvmlInit() |
| 84 | + >>> handle = nvmlDeviceGetHandleByIndex(0) |
| 85 | + >>> (current, pending) = nvmlDeviceGetEccMode(handle) |
| 86 | + ``` |
| 87 | + |
| 88 | +- C structs are converted into Python classes. |
| 89 | + |
| 90 | + E.g. the C struct: |
| 91 | + ```C |
| 92 | + nvmlReturn_t DECLDIR nvmlDeviceGetMemoryInfo(nvmlDevice_t device, |
| 93 | + nvmlMemory_t *memory); |
| 94 | + typedef struct nvmlMemory_st { |
| 95 | + unsigned long long total; |
| 96 | + unsigned long long free; |
| 97 | + unsigned long long used; |
| 98 | + } nvmlMemory_t; |
| 99 | + ``` |
| 100 | + |
| 101 | + Becomes: |
| 102 | + ```python |
| 103 | + >>> info = nvmlDeviceGetMemoryInfo(handle) |
| 104 | + >>> print "Total memory:", info.total |
| 105 | + Total memory: 5636292608 |
| 106 | + >>> print "Free memory:", info.free |
| 107 | + Free memory: 5578420224 |
| 108 | + >>> print "Used memory:", info.used |
| 109 | + Used memory: 57872384 |
| 110 | + |
| 111 | +- Python handles string buffer creation. |
| 112 | + E.g. the C function: |
| 113 | + ```C |
| 114 | + nvmlReturn_t nvmlSystemGetDriverVersion(char* version, |
| 115 | + unsigned int length); |
| 116 | + ``` |
| 117 | + Can be called like so: |
| 118 | + ```python |
| 119 | + >>> version = nvmlSystemGetDriverVersion(); |
| 120 | + >>> nvmlShutdown() |
| 121 | + ``` |
| 122 | + |
| 123 | +For usage information see the NVML documentation. |
| 124 | + |
| 125 | +## Variables |
| 126 | +--------- |
| 127 | +All meaningful NVML constants and enums are exposed in Python. |
| 128 | + |
| 129 | +The NVML_VALUE_NOT_AVAILABLE constant is not used. Instead None is mapped to the field. |
| 130 | + |
| 131 | +## Release Notes |
| 132 | +------------- |
| 133 | +Version 2.285.0 |
| 134 | +- Added new functions for NVML 2.285. See NVML documentation for more information. |
| 135 | +- Ported to support Python 3.0 and Python 2.0 syntax. |
| 136 | +- Added nvidia_smi.py tool as a sample app. |
| 137 | +Version 3.295.0 |
| 138 | +- Added new functions for NVML 3.295. See NVML documentation for more information. |
| 139 | +- Updated nvidia_smi.py tool |
| 140 | + - Includes additional error handling |
| 141 | +Version 4.304.0 |
| 142 | +- Added new functions for NVML 4.304. See NVML documentation for more information. |
| 143 | +- Updated nvidia_smi.py tool |
| 144 | +Version 4.304.3 |
| 145 | +- Fixing nvmlUnitGetDeviceCount bug |
| 146 | +Version 5.319.0 |
| 147 | +- Added new functions for NVML 5.319. See NVML documentation for more information. |
| 148 | +Version 6.340.0 |
| 149 | +- Added new functions for NVML 6.340. See NVML documentation for more information. |
| 150 | +Version 7.346.0 |
| 151 | +- Added new functions for NVML 7.346. See NVML documentation for more information. |
| 152 | +Version 7.352.0 |
| 153 | +- Added new functions for NVML 7.352. See NVML documentation for more information. |
| 154 | + |
| 155 | +COPYRIGHT |
| 156 | +--------- |
| 157 | +Copyright (c) 2011-2015, NVIDIA Corporation. All rights reserved. |
| 158 | + |
| 159 | +LICENSE |
| 160 | +------- |
| 161 | +Redistribution and use in source and binary forms, with or without |
| 162 | +modification, are permitted provided that the following conditions are met: |
| 163 | + |
| 164 | +- Redistributions of source code must retain the above copyright notice, this |
| 165 | +list of conditions and the following disclaimer. |
| 166 | + |
| 167 | +- Redistributions in binary form must reproduce the above copyright notice, |
| 168 | +this list of conditions and the following disclaimer in the documentation |
| 169 | +and/or other materials provided with the distribution. |
| 170 | + |
| 171 | +- Neither the name of the NVIDIA Corporation nor the names of its contributors |
| 172 | +may be used to endorse or promote products derived from this software without |
| 173 | +specific prior written permission. |
| 174 | + |
| 175 | +THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND |
| 176 | +ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED |
| 177 | +WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE |
| 178 | +DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE |
| 179 | +FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| 180 | +DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR |
| 181 | +SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER |
| 182 | +CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, |
| 183 | +OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| 184 | +OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| 185 | + |
| 186 | + |
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