安装环境
- Win10
- Python3.6.4 3.5以上版本都可以,目前Tensorflow只支持64位python3.5以上版本
- numpy 安装好Python后打开终端cmd输入 pip3 install numpy ###具体流程
- 下载安装Cuda8.0,一定要是8.0版本!下载地址,并按照下图选择下载本地安装包。
如果安装错了记得要把之前的删除卸载干净
- 安装完成后配置系统环境变量Path
TensorFlow 是一个编程系统, 使用图来表示计算任务,图必须在Session(会话)里被启动. Session将图的op(操作)分发到诸如CPU或GPU之类的设备上运行。所以,这个时候你运行python然后
import tensorflow as tf
是不会报错的,但是当你要执行tf.Session()
的时候可能就有问题了。这个时候将会调用cuda,我在这里遇到的问题是各种lib,dll加载不了。经过一番检查,定位到问题,Cuda安装完成后默认的环境变量配置不对,不能直接访问到bin
和libx64
下的程序包,在path中加上这两个路径即可。
原本安装好之后并不会有以上四个环境变量,有两个需要自己加上。
C:Program FilesNVIDIA GPU Computing ToolkitCUDAv8.0
C:Program FilesNVIDIA GPU Computing ToolkitCUDAv8.0bin
C:Program FilesNVIDIA GPU Computing ToolkitCUDAv8.0libx64
C:Program FilesNVIDIA GPU Computing ToolkitCUDAv8.0libnvvp
附配置环境变量教程
最后在cmd里输入 echo %path%
就能查看你的是否添加进环境变量了
- 下载Cudnn6.0,下载地址,需要注册并填问卷,下载后解压压缩包,将包内文件夹里面的内容分别拷贝到C:Program FilesNVIDIA GPU Computing ToolkitCUDAv8.0里面的三个文件夹中去。
- 最后测试和检查一下,代码如下
import ctypes
import imp
import sys
def main():
try:
import tensorflow as tf
print("TensorFlow successfully installed.")
if tf.test.is_built_with_cuda():
print("The installed version of TensorFlow includes GPU support.")
else:
print("The installed version of TensorFlow does not include GPU support.")
sys.exit(0)
except ImportError:
print("ERROR: Failed to import the TensorFlow module.")
candidate_explanation = False
python_version = sys.version_info.major, sys.version_info.minor
print("n- Python version is %d.%d." % python_version)
if not (python_version == (3, 5) or python_version == (3, 6)):
candidate_explanation = True
print("- The official distribution of TensorFlow for Windows requires "
"Python version 3.5 or 3.6.")
try:
_, pathname, _ = imp.find_module("tensorflow")
print("n- TensorFlow is installed at: %s" % pathname)
except ImportError:
candidate_explanation = False
print("""
- No module named TensorFlow is installed in this Python environment. You may
install it using the command `pip install tensorflow`.""")
try:
msvcp140 = ctypes.WinDLL("msvcp140.dll")
except OSError:
candidate_explanation = True
print("""
- Could not load 'msvcp140.dll'. TensorFlow requires that this DLL be
installed in a directory that is named in your %PATH% environment
variable. You may install this DLL by downloading Microsoft Visual
C 2015 Redistributable Update 3 from this URL:
https://www.microsoft.com/en-us/download/details.aspx?id=53587""")
try:
cudart64_80 = ctypes.WinDLL("cudart64_80.dll")
except OSError:
candidate_explanation = True
print("""
- Could not load 'cudart64_80.dll'. The GPU version of TensorFlow
requires that this DLL be installed in a directory that is named in
your %PATH% environment variable. Download and install CUDA 8.0 from
this URL: https://developer.nvidia.com/cuda-toolkit""")
try:
nvcuda = ctypes.WinDLL("nvcuda.dll")
except OSError:
candidate_explanation = True
print("""
- Could not load 'nvcuda.dll'. The GPU version of TensorFlow requires that
this DLL be installed in a directory that is named in your %PATH%
environment variable. Typically it is installed in 'C:WindowsSystem32'.
If it is not present, ensure that you have a CUDA-capable GPU with the
correct driver installed.""")
cudnn5_found = False
try:
cudnn5 = ctypes.WinDLL("cudnn64_5.dll")
cudnn5_found = True
except OSError:
candidate_explanation = True
print("""
- Could not load 'cudnn64_5.dll'. The GPU version of TensorFlow
requires that this DLL be installed in a directory that is named in
your %PATH% environment variable. Note that installing cuDNN is a
separate step from installing CUDA, and it is often found in a
different directory from the CUDA DLLs. You may install the
necessary DLL by downloading cuDNN 5.1 from this URL:
https://developer.nvidia.com/cudnn""")
cudnn6_found = False
try:
cudnn = ctypes.WinDLL("cudnn64_6.dll")
cudnn6_found = True
except OSError:
candidate_explanation = True
if not cudnn5_found or not cudnn6_found:
print()
if not cudnn5_found and not cudnn6_found:
print("- Could not find cuDNN.")
elif not cudnn5_found:
print("- Could not find cuDNN 5.1.")
else:
print("- Could not find cuDNN 6.")
print("""
The GPU version of TensorFlow requires that the correct cuDNN DLL be installed
in a directory that is named in your %PATH% environment variable. Note that
installing cuDNN is a separate step from installing CUDA, and it is often
found in a different directory from the CUDA DLLs. The correct version of
cuDNN depends on your version of TensorFlow:
* TensorFlow 1.2.1 or earlier requires cuDNN 5.1. ('cudnn64_5.dll')
* TensorFlow 1.3 or later requires cuDNN 6. ('cudnn64_6.dll')
You may install the necessary DLL by downloading cuDNN from this URL:
https://developer.nvidia.com/cudnn""")
if not candidate_explanation:
print("""
- All required DLLs appear to be present. Please open an issue on the
TensorFlow GitHub page: https://github.com/tensorflow/tensorflow/issues""")
sys.exit(-1)
if __name__ == "__main__":
main()
如果失败的话记得检查一下报错信息,没有安装CUDA8.0或者环境配置不对:
Could not load ‘cudart64_80.dll’. The GPU version of TensorFlow requires that this DLL be installed in a directory that is named in your %PATH% environment variable. Download and install CUDA 8.0 from this URL: https://developer.nvidia.com/cuda-toolkit
安装成功:
TensorFlow successfully installed. The installed version of TensorFlow includes GPU support.
注意几点
- Cuba一定要安装8.0版本!Cuba一定要安装8.0版本!Cuba一定要安装8.0版本!
- Anaconda并不是必需,可以使用可以不使用
- Cudnn的版本我这里提示的是Cudnn6,大家看提示安装
后续
跑个DQN玩FlappyBird测试:源码在这里