0.pip/conda换默认源

为了高效下载，建议先把默认源换了，很简单这里不再赘述。（我用梯子，所以没换源😋）



cudnn7.6.0 + cuda10.1.168 +tensorflow-gpu2.3.0

1.Anaconda+python虚拟环境

如果你需要用到tensorflow了那我相信你一定会用Anaconda，Anaconda的安装不再赘述。只是提个醒，如果你第一次用conda create -n创建环境那么路径一定在C盘，而换默认路径一定是可以设置的，这里也不再展开
创建TensorFlow环境：(tf是环境名字，尽量取短点吧，要不然以后手都输麻)

conda create -n tf python=3.9

2.安装CUDA以及cudnn

找到NVIDIA控制面板->帮助->系统信息->组件看一下CUDA版本，我的12.0是目前最新的，一般向下兼容

先试试cudatoolkit11.3.1和cudnn8.2.1

conda search cuda

测试tensorflow的GPU版本安装成功的办法

import tensorflow as tf

print('GPU',tf.test.is_gpu_available())

a = tf.constant(2.)
b = tf.constant(4.)

print(a * b)

运行结果

D:\python\python.exe E:/pycharm_project2019/forward/test_gpu.py
2019-09-21 18:03:09.167168: I tensorflow/stream_executor/platform/default/dso_loader.cc:44] Successfully opened dynamic library cudart64_100.dll
2019-09-21 18:03:12.435151: I tensorflow/core/platform/cpu_feature_guard.cc:142] Your CPU supports instructions that this TensorFlow binary was not compiled to use: AVX2
2019-09-21 18:03:12.439660: I tensorflow/stream_executor/platform/default/dso_loader.cc:44] Successfully opened dynamic library nvcuda.dll
2019-09-21 18:03:12.809533: I tensorflow/core/common_runtime/gpu/gpu_device.cc:1618] Found device 0 with properties: 
name: GeForce 940M major: 5 minor: 0 memoryClockRate(GHz): 0.98
pciBusID: 0000:04:00.0
2019-09-21 18:03:12.809793: I tensorflow/stream_executor/platform/default/dlopen_checker_stub.cc:25] GPU libraries are statically linked, skip dlopen check.
2019-09-21 18:03:12.814170: I tensorflow/core/common_runtime/gpu/gpu_device.cc:1746] Adding visible gpu devices: 0
2019-09-21 18:03:24.691808: I tensorflow/core/common_runtime/gpu/gpu_device.cc:1159] Device interconnect StreamExecutor with strength 1 edge matrix:
2019-09-21 18:03:24.692136: I tensorflow/core/common_runtime/gpu/gpu_device.cc:1165]      0 
2019-09-21 18:03:24.692327: I tensorflow/core/common_runtime/gpu/gpu_device.cc:1178] 0:   N 
2019-09-21 18:03:24.785375: I tensorflow/core/common_runtime/gpu/gpu_device.cc:1304] Created TensorFlow device (/device:GPU:0 with 514 MB memory) -> physical GPU (device: 0, name: GeForce 940M, pci bus id: 0000:04:00.0, compute capability: 5.0)
GPU True
2019-09-21 18:03:24.909917: I tensorflow/core/common_runtime/gpu/gpu_device.cc:1618] Found device 0 with properties: 
name: GeForce 940M major: 5 minor: 0 memoryClockRate(GHz): 0.98
pciBusID: 0000:04:00.0
2019-09-21 18:03:24.910666: I tensorflow/stream_executor/platform/default/dlopen_checker_stub.cc:25] GPU libraries are statically linked, skip dlopen check.
2019-09-21 18:03:24.927035: I tensorflow/core/common_runtime/gpu/gpu_device.cc:1746] Adding visible gpu devices: 0
2019-09-21 18:03:24.963911: I tensorflow/core/common_runtime/gpu/gpu_device.cc:1618] Found device 0 with properties: 
name: GeForce 940M major: 5 minor: 0 memoryClockRate(GHz): 0.98
pciBusID: 0000:04:00.0
2019-09-21 18:03:24.964226: I tensorflow/stream_executor/platform/default/dlopen_checker_stub.cc:25] GPU libraries are statically linked, skip dlopen check.
2019-09-21 18:03:24.968809: I tensorflow/core/common_runtime/gpu/gpu_device.cc:1746] Adding visible gpu devices: 0
2019-09-21 18:03:24.969307: I tensorflow/core/common_runtime/gpu/gpu_device.cc:1159] Device interconnect StreamExecutor with strength 1 edge matrix:
2019-09-21 18:03:24.969515: I tensorflow/core/common_runtime/gpu/gpu_device.cc:1165]      0 
2019-09-21 18:03:24.969647: I tensorflow/core/common_runtime/gpu/gpu_device.cc:1178] 0:   N 
2019-09-21 18:03:24.974380: I tensorflow/core/common_runtime/gpu/gpu_device.cc:1304] Created TensorFlow device (/job:localhost/replica:0/task:0/device:GPU:0 with 514 MB memory) -> physical GPU (device: 0, name: GeForce 940M, pci bus id: 0000:04:00.0, compute capability: 5.0)
tf.Tensor(8.0, shape=(), dtype=float32)

Process finished with exit code 0

显示“GPU True”,即代表GPU版本安装成功！