MMDeploy的TensorRT教程

Step1: 创建虚拟环境并且安装MMDetection

conda create -n openmmlab python=3.7 -y
conda activate openmmlab conda install pytorch==1.8.0 torchvision==0.9.0 cudatoolkit=10.2 -c pytorch -y # install mmcv
pip install mmcv-full==1.4.0 -f https://download.openmmlab.com/mmcv/dist/cu102/torch1.8/index.html # install mmdetection
git clone https://github.com/open-mmlab/mmdetection.git
cd mmdetection
pip install -r requirements/build.txt
pip install -v -e .

Step2: 下载MMDetectin中训练好的权重

Download the checkpoint from this link and put it in the {MMDET_ROOT}/checkpoints where {MMDET_ROOT} is the root directory of your MMDetection codebase.

Step3: 下载安装MMDeploy

  • 在anaconda中运行下列命令来安装MMDeploy
conda activate openmmlab

git clone https://github.com/open-mmlab/mmdeploy.git
cd mmdeploy
git submodule update --init --recursive
pip install -e . # 安装MMDeploy

Step4: Install TensorRT

  1. install TensorRT through tar file

  2. After installation, you’d better add TensorRT environment variables to bashrc by

cd /the/path/of/tensorrt/tar/gz/file
tar -zxvf TensorRT-8.2.3.0.Linux.x86_64-gnu.cuda-11.4.cudnn8.2.tar.gz # 将下面的导入到 ~/.bashrc
export TENSORRT_DIR=$(pwd)/TensorRT-8.2.3.0
export LD_LIBRARY_PATH=$TENSORRT_DIR/lib:$LD_LIBRARY_PATH

Step5: Install cuDNN

  1. install cudnn8.2 through tar file

  2. Extract the compressed file and set the environment variables

cd /the/path/of/cudnn/tgz/file
tar -zxvf cudnn-11.3-linux-x64-v8.2.1.32.tgz # 将下面的导入到 ~/.bashrc
export CUDNN_DIR=$(pwd)/cuda
export LD_LIBRARY_PATH=$CUDNN_DIR/lib64:$LD_LIBRARY_PATH

Step6: Build Model Converter

Step6-1: Build Custom Ops

  • TensorRT Custom Ops
cd ${MMDEPLOY_DIR}
mkdir -p build && cd build cmake -DCMAKE_CXX_COMPILER=g++-7 \
-DMMDEPLOY_TARGET_BACKENDS=trt \
-DTENSORRT_DIR=${TENSORRT_DIR} \
-DCUDNN_DIR=${CUDNN_DIR} .. make -j$(nproc)

Step6-2: install Model Converter

cd ${MMDEPLOY_DIR}
pip install -e .

Step6-3: 验证模型是否能够进行转换

python ${MMDEPLOY_DIR}/tools/check_env.py

# 如果正常输出会得到:
# 2022-05-04 10:13:07,140 - mmdeploy - INFO - tensorrt: 8.2.3.0 ops_is_avaliable : True

Step6-4: Convert Model

  • Once you have installed MMDeploy, you can convert the PyTorch model in the OpenMMLab model zoo to the backend model with one magic spell!
# Assume you have installed MMDeploy in ${MMDEPLOY_DIR} and MMDetection in ${MMDET_DIR}
# If you do not know where to find the path. Just type `pip show mmdeploy` and `pip show mmdet` in your console. python ${MMDEPLOY_DIR}/tools/deploy.py \
${MMDEPLOY_DIR}/configs/mmdet/detection/detection_tensorrt_dynamic-320x320-1344x1344.py \
${MMDET_DIR}/configs/faster_rcnn/faster_rcnn_r50_fpn_1x_coco.py \
${MMDET_DIR}/checkpoints/faster_rcnn_r50_fpn_1x_coco_20200130-047c8118.pth \
${MMDET_DIR}/demo/demo.jpg \
--work-dir work_dirs \ # 转换好的模型保存目录
--device cuda:0 \ # 将cuda:0 更改成cuda???
--show \ # 展示使用后端推理框架,和原来pytorch推理的两张图片
--dump-info # 输出,可用与SDK

At the same time, an onnx model file end2end.onnx and ene2end.engine deploy.json detail.json pipeline.json (SDK config files) will generate on the work directory work_dirs.

Step6-5: Inference Model

  • Now you can do model inference with the APIs provided by the backend. But what if you want to test the model instantly? We have some backend wrappers for you.
from mmdeploy.apis import inference_model

deploy_cfg = "/home/zranguai/Deploy/MMDeploy/configs/mmdet/detection/detection_tensorrt_dynamic-320x320-1344x1344.py"
model_cfg = "/home/zranguai/Deploy/mmdetection/configs/faster_rcnn/faster_rcnn_r50_fpn_1x_coco.py"
backend_files = ["/home/zranguai/Deploy/MMDeploy/work_dirs/end2end.engine"]
img = "/home/zranguai/Deploy/mmdetection/demo/demo.jpg"
device = 'cuda:0' result = inference_model(model_cfg, deploy_cfg, backend_files, img=img, device=device)
print(result)

Step6-6: Evaluate Model

  • You might wonder that does the backend model have the same precision as the original one? How fast can the model run? MMDeploy provides tools to test the model.
python ${MMDEPLOY_DIR}/tools/test.py \
${MMDEPLOY_DIR}/configs/mmdet/detection/detection_tensorrt_dynamic-320x320-1344x1344.py \
${MMDET_DIR}/configs/faster_rcnn/faster_rcnn_r50_fpn_1x_coco.py \
--model /home/zranguai/Deploy/MMDeploy/work_dirs/end2end.engine \
--metrics "bbox" \
--device cuda:0

Step7: Build SDK

Step7-1: build MMDeploy SDK for TensorRT

注意: 30系显卡需要将pplcv安装到最新版本。参考issue

cd ${MMDEPLOY_DIR}
mkdir -p build && cd build cmake -DMMDEPLOY_BUILD_SDK=ON \
-DCMAKE_CXX_COMPILER=g++-7 \
-DMMDEPLOY_BUILD_SDK_PYTHON_API=ON \
-DMMDEPLOY_TARGET_DEVICES="cuda;cpu" \
-DMMDEPLOY_TARGET_BACKENDS=trt \
-Dpplcv_DIR=${PPLCV_DIR}/cuda-build/install/lib/cmake/ppl \ # pplcv到最新版本 A high-performance image processing library of openPPL. ref:https://mmdeploy.readthedocs.io/en/latest/build/linux.html#install-dependencies-for-sdk
-DTENSORRT_DIR=${TENSORRT_DIR} \
-DCUDNN_DIR=${CUDNN_DIR} \
-DOpenCV_DIR=/usr/lib/x86_64-linux-gnu/cmake/opencv4 \
-Dspdlog_DIR=/usr/lib/x86_64-linux-gnu/cmake/spdlog \
-DMMDEPLOY_CODEBASES=mmdet .. make -j$(nproc) && make install

Step7-2: build demo

cd ${MMDEPLOY_DIR}/build/install/example
mkdir -p build && cd build cmake -DOpenCV_DIR=/usr/lib/x86_64-linux-gnu/cmake/opencv4 \
-DMMDeploy_DIR=${MMDEPLOY_DIR}/build/install/lib/cmake/MMDeploy ..
make object_detection # suppress verbose logs
export SPDLOG_LEVEL=warn # running the object detection example
./object_detection cuda ${work_dirs} ${path/to/an/image}
# 例子: ./object_detection cuda ${MMDEPLOY_DIR}/work_dirs ${MMDET_DIR}/demo/demo.jpg

在Clion中调试代码

setting中设置:
CMake options:
-DMMDeploy_DIR=/home/zranguai/Deploy/MMDeploy/build/install/lib/cmake/MMDeploy -DTENSORRT_DIR=/home/zranguai/Deploy/Backend/TensorRT/TensorRT-8.2.3.0 -DCUDNN_DIR=/home/zranguai/Deploy/Backend/TensorRT/cuda Build directory:
/home/zranguai/Deploy/MMDeploy/build/install Build options:
object_detection configuation:
cuda /home/zranguai/Deploy/MMDeploy/work_dirs /home/zranguai/Deploy/MMDeploy/demo/demo.jpg

+++++++++++++++++++我是分割线++++++++++++++

MMDeploy的onnxruntime教程

  • 参考官方教程

Here is an example of how to deploy and inference Faster R-CNN model of MMDetection from scratch.

step1: 创建虚拟环境并且安装MMDetection

Create Virtual Environment and Install MMDetection.

Please run the following command in Anaconda environment to install MMDetection.

conda create -n openmmlab python=3.7 -y
conda activate openmmlab conda install pytorch==1.8.0 torchvision==0.9.0 cudatoolkit=10.2 -c pytorch -y # install mmcv
pip install mmcv-full==1.4.0 -f https://download.openmmlab.com/mmcv/dist/cu102/torch1.8/index.html # install mmdetection
git clone https://github.com/open-mmlab/mmdetection.git
cd mmdetection
pip install -r requirements/build.txt
pip install -v -e .

step2: 下载MMDetectin中训练好的权重

Download the Checkpoint of Faster R-CNN

Download the checkpoint from this link and put it in the {MMDET_ROOT}/checkpoints where {MMDET_ROOT} is the root directory of your MMDetection codebase.

step3: 安装MMDeploy和ONNX Runtime

Install MMDeploy and ONNX Runtime

step3-1: 安装MMDeploy

Please run the following command in Anaconda environment to install MMDeploy.

conda activate openmmlab

git clone https://github.com/open-mmlab/mmdeploy.git
cd mmdeploy
git submodule update --init --recursive
pip install -e . # 安装MMDeploy
step3-2a: 下载onnxruntime

Once we have installed the MMDeploy, we should select an inference engine for model inference. Here we take ONNX Runtime as an example. Run the following command to install ONNX Runtime:

pip install onnxruntime==1.8.1

Then download the ONNX Runtime library to build the mmdeploy plugin for ONNX Runtime:

step3-2b: 制作onnxruntime的插件(模型转换会需要)
wget https://github.com/microsoft/onnxruntime/releases/download/v1.8.1/onnxruntime-linux-x64-1.8.1.tgz

tar -zxvf onnxruntime-linux-x64-1.8.1.tgz
cd onnxruntime-linux-x64-1.8.1
export ONNXRUNTIME_DIR=$(pwd)
export LD_LIBRARY_PATH=$ONNXRUNTIME_DIR/lib:$LD_LIBRARY_PATH # 也可将这两句写进~/.bashrc cd ${MMDEPLOY_DIR} # To MMDeploy root directory
mkdir -p build && cd build # build ONNXRuntime custom ops
cmake -DMMDEPLOY_TARGET_BACKENDS=ort -DONNXRUNTIME_DIR=${ONNXRUNTIME_DIR} ..
make -j$(nproc)
step3-2c: build MMDeploy SDK(使用C的接口会用到)
# build MMDeploy SDK
cmake -DMMDEPLOY_BUILD_SDK=ON \
-DCMAKE_CXX_COMPILER=g++-7 \
-DOpenCV_DIR=/path/to/OpenCV/lib/cmake/OpenCV \ # 这里的opencv安装可参考这里https://mmdeploy.readthedocs.io/en/latest/build/linux.html#install-dependencies-for-sdk
-Dspdlog_DIR=/path/to/spdlog/lib/cmake/spdlog \ # 这里的spdlog安装可参考这里https://mmdeploy.readthedocs.io/en/latest/build/linux.html#install-dependencies-for-sdk
-DONNXRUNTIME_DIR=${ONNXRUNTIME_DIR} \
-DMMDEPLOY_TARGET_BACKENDS=ort \
-DMMDEPLOY_CODEBASES=mmdet ..
make -j$(nproc) && make install # build MMDeploy SDK具体案例
cmake -DMMDEPLOY_BUILD_SDK=ON \
-DCMAKE_CXX_COMPILER=g++-7 \
-DOpenCV_DIR=/usr/lib/x86_64-linux-gnu/cmake/opencv4 \ # 通过apt-get安装的
-Dspdlog_DIR=/usr/lib/x86_64-linux-gnu/cmake/spdlog \
-DONNXRUNTIME_DIR=${ONNXRUNTIME_DIR} \
-DMMDEPLOY_TARGET_BACKENDS=ort \
-DMMDEPLOY_CODEBASES=mmdet .. # 其中${MMDEPLOY_DIR} ${MMDET_DIR} ${ONNXRUNTIME_DIR}都可以写在 ~/.bashrc里面然后source ~/.bashrc生效
补充: 验证后端和插件是否安装成功
python ${MMDEPLOY_DIR}/tools/check_env.py

step4: Model Conversion

Once we have installed MMDetection, MMDeploy, ONNX Runtime and built plugin for ONNX Runtime, we can convert the Faster R-CNN to a .onnx model file which can be received by ONNX Runtime. Run following commands to use our deploy tools:

# Assume you have installed MMDeploy in ${MMDEPLOY_DIR} and MMDetection in ${MMDET_DIR}
# If you do not know where to find the path. Just type `pip show mmdeploy` and `pip show mmdet` in your console. python ${MMDEPLOY_DIR}/tools/deploy.py \
${MMDEPLOY_DIR}/configs/mmdet/detection/detection_onnxruntime_dynamic.py \
${MMDET_DIR}/configs/faster_rcnn/faster_rcnn_r50_fpn_1x_coco.py \
${MMDET_DIR}/checkpoints/faster_rcnn_r50_fpn_1x_coco_20200130-047c8118.pth \
${MMDET_DIR}/demo/demo.jpg \
--work-dir work_dirs \ # 转换好的模型保存目录
--device cpu \
--show \ # 展示使用后端推理框架,和原来pytorch推理的两张图片
--dump-info # 输出方便,可用与SDK # 补充
# ${MMDEPLOY_DIR}和${MMDET_DIR}已经写进了~/.bashrc
# 转换好了模型可以通过python接口进行推理
例如: Inference Model
Now you can do model inference with the APIs provided by the backend. But what if you want to test the model instantly? We have some backend wrappers for you. from mmdeploy.apis import inference_model result = inference_model(model_cfg, deploy_cfg, backend_files, img=img, device=device)

If the script runs successfully, two images will display on the screen one by one. The first image is the infernce result of ONNX Runtime and the second image is the result of PyTorch. At the same time, an onnx model file end2end.onnx and three json files (SDK config files) will generate on the work directory work_dirs.

step5: Run MMDeploy SDK demo

After model conversion, SDK Model is saved in directory ${work_dir}.

Here is a recipe for building & running object detection demo.

cd build/install/example

# path to onnxruntime ** libraries **
export LD_LIBRARY_PATH=/path/to/onnxruntime/lib
# 例子: export LD_LIBRARY_PATH=/home/zranguai/Deploy/Backend/ONNXRuntime/onnxruntime-linux-x64-1.8.1/lib mkdir -p build && cd build
cmake -DOpenCV_DIR=path/to/OpenCV/lib/cmake/OpenCV \
-DMMDeploy_DIR=${MMDEPLOY_DIR}/build/install/lib/cmake/MMDeploy ..
make object_detection # 例子:
# cmake -DOpenCV_DIR=/usr/lib/x86_64-linux-gnu/cmake/opencv4 \
# -DMMDeploy_DIR=${MMDEPLOY_DIR}/build/install/lib/cmake/MMDeploy .. # suppress verbose logs
export SPDLOG_LEVEL=warn # running the object detection example
./object_detection cpu ${work_dirs} ${path/to/an/image}
# 例子: ./object_detection cpu ${MMDEPLOY_DIR}/work_dirs ${MMDET_DIR}/demo/demo.jpg

If the demo runs successfully, an image named "output_detection.png" is supposed to be found showing detection objects.

++++++++++++++++++++++++++++++++分割线++++++

MMDeploy的OpenVINO教程

Step1: 创建虚拟环境并且安装MMDetection

conda create -n openmmlab python=3.7 -y
conda activate openmmlab conda install pytorch==1.8.0 torchvision==0.9.0 cudatoolkit=10.2 -c pytorch -y # install mmcv
pip install mmcv-full==1.4.0 -f https://download.openmmlab.com/mmcv/dist/cu102/torch1.8/index.html # install mmdetection
git clone https://github.com/open-mmlab/mmdetection.git
cd mmdetection
pip install -r requirements/build.txt
pip install -v -e .

Step2: 下载MMDetectin中训练好的权重

Download the checkpoint from this link and put it in the {MMDET_ROOT}/checkpoints where {MMDET_ROOT} is the root directory of your MMDetection codebase.

Step3: 下载安装MMDeploy

  • 在anaconda中运行下列命令来安装MMDeploy
conda activate openmmlab

git clone https://github.com/open-mmlab/mmdeploy.git
cd mmdeploy
git submodule update --init --recursive
pip install -e . # 安装MMDeploy

Step4: 下载OpenVINO

pip install openvino-dev

step4-1: 根据官网提示: 这里的openvino不需要custom ops

step4-2: 可选项: 下载用于使用OpenVINO的SDK

  • Optional. If you want to use OpenVINO in MMDeploy SDK, please install and configure it by following the guild

  • 参考安装教程

  1. OpenVINO安装
tar -xvzf l_openvino_toolkit_p_2020.4.287.tgz
cd l_openvino_toolkit_p_2020.4.287
sudo ./install_GUI.sh 一路next安装
cd /opt/intel/openvino/install_dependencies
sudo ./install_openvino_dependencies.sh
vi ~/.bashrc
  1. 把如下几行放置到 bashrc 文件尾
# set env for openvino
source /opt/intel/openvino_2021/bin/setupvars.sh # 注意找到是自己的路径
export INTEL_OPENVINO_DIR=/opt/intel/openvino_2021
export LD_LIBRARY_PATH=/opt/intel/openvino_2021/deployment_tools/inference_engine/lib/intel64
  1. source ~/.bashrc 激活环境
  2. 模型优化配置步骤
cd /opt/intel/openvino_2021/deployment_tools/model_optimizer/install_prerequisites

sudo ./install_prerequisites.sh  # 可以只安装onnx的

step4-3: build MMDeploy SDK(openvino)

cd ${MMDEPLOY_DIR} # To MMDeploy root directory
mkdir -p build && cd build cmake -DMMDEPLOY_BUILD_SDK=ON \
-DCMAKE_CXX_COMPILER=g++-7 \
-DOpenCV_DIR=/path/to/OpenCV/lib/cmake/OpenCV \
-Dspdlog_DIR=/path/to/spdlog/lib/cmake/spdlog \
-DInferenceEngine_DIR=${INTEL_OPENVINO_DIR}/deployment_tools/inference_engine/share \
-DMMDEPLOY_TARGET_BACKENDS=openvino \
-DMMDEPLOY_CODEBASES=mmdet ..
make -j$(nproc) && make install # build MMDeploy SDK具体案例
cmake -DMMDEPLOY_BUILD_SDK=ON \
-DCMAKE_CXX_COMPILER=g++-7 \
-DOpenCV_DIR=/usr/lib/x86_64-linux-gnu/cmake/opencv4 \ # 这里设置apt-get下载的opencv
-Dspdlog_DIR=/usr/lib/x86_64-linux-gnu/cmake/spdlog \
-DInferenceEngine_DIR=${INTEL_OPENVINO_DIR}/deployment_tools/inference_engine/share \
-DMMDEPLOY_TARGET_BACKENDS=openvino \
-DMMDEPLOY_CODEBASES=mmdet .. # ${INTEL_OPENVINO_DIR}写进了~/.bashrc
补充: 验证后端和插件是否安装成功(注意openvino不需要安装插件)
python ${MMDEPLOY_DIR}/tools/check_env.py

# 当把这个export LD_LIBRARY_PATH=/opt/intel/openvino_2021/deployment_tools/inference_engine/lib/intel64写进~/.bashrc里面时候,会导致出现libopencv_ml.so.4.5: cannot open shared object file: No such file or directory  ??

Step5: Model Conversion(这一步也可以放在step4-1前面)

# Assume you have installed MMDeploy in ${MMDEPLOY_DIR} and MMDetection in ${MMDET_DIR}
# If you do not know where to find the path. Just type `pip show mmdeploy` and `pip show mmdet` in your console. python ${MMDEPLOY_DIR}/tools/deploy.py \
${MMDEPLOY_DIR}/configs/mmdet/detection/detection_openvino_dynamic-300x300.py \
${MMDET_DIR}/configs/faster_rcnn/faster_rcnn_r50_fpn_1x_coco.py \
${MMDET_DIR}/checkpoints/faster_rcnn_r50_fpn_1x_coco_20200130-047c8118.pth \
${MMDET_DIR}/demo/demo.jpg \
--work-dir work_dirs \ # 转换好的模型保存目录
--device cpu \
--show \ # 展示使用后端推理框架,和原来pytorch推理的两张图片
--dump-info # 输出,可用与SDK # 补充
# ${MMDEPLOY_DIR}和${MMDET_DIR}已经写进了~/.bashrc
# 转换好了模型可以通过python接口进行推理
例如: Inference Model
Now you can do model inference with the APIs provided by the backend. But what if you want to test the model instantly? We have some backend wrappers for you. from mmdeploy.apis import inference_model result = inference_model(model_cfg, deploy_cfg, backend_files, img=img, device=device) 例子:
deploy_cfg = "/home/zranguai/Deploy/MMDeploy/configs/mmdet/detection/detection_openvino_dynamic-300x300.py"
model_cfg = "/home/zranguai/Deploy/mmdetection/configs/faster_rcnn/faster_rcnn_r50_fpn_1x_coco.py"
backend_files = [ "/home/zranguai/Deploy/MMDeploy/work_dirs/end2end.xml",]
img = "/home/zranguai/Deploy/mmdetection/demo/demo.jpg"
device = 'cpu' from mmdeploy.apis import visualize_model
visualize_model(model_cfg, deploy_cfg, backend_files[0], img, device, show_result=True)

python ${MMDEPLOY_DIR}/tools/check_env.pyIf the script runs successfully, two images will display on the screen one by one. The first image is the infernce result of OpenVINO and the second image is the result of PyTorch. At the same time, an onnx model file end2end.onnx and ene2end.bin(contains the weights and biases binary data) end2end.xml(describes the networks topology) end2end.mapping deploy.json detail.json pipeline.json (SDK config files) will generate on the work directory work_dirs.

Step6: Run MMDeploy SDK demo(for openvino)

After model conversion, SDK Model is saved in directory ${work_dir}.

Here is a recipe for building & running object detection demo.

cd build/install/example

# path to openvino ** libraries **
export LD_LIBRARY_PATH=/path/to/onnxruntime/lib/intel64
# 例子: export LD_LIBRARY_PATH=/opt/intel/openvino_2021/deployment_tools/inference_engine/lib/intel64 mkdir -p build && cd build
cmake -DOpenCV_DIR=path/to/OpenCV/lib/cmake/OpenCV \ # openvino中opencv路径
-DMMDeploy_DIR=${MMDEPLOY_DIR}/build/install/lib/cmake/MMDeploy ..
make object_detection # 例子2:
# cmake -DOpenCV_DIR=/opt/intel/openvino_2021/opencv/cmake \
# -DMMDeploy_DIR=${MMDEPLOY_DIR}/build/install/lib/cmake/MMDeploy .. # suppress verbose logs
export SPDLOG_LEVEL=warn # running the object detection example
./object_detection cpu ${work_dirs} ${path/to/an/image}
# 例子: ./object_detection cpu ${MMDEPLOY_DIR}/work_dirs ${MMDET_DIR}/demo/demo.jpg
# 可能出现的错误: 上面导出的xml的name: torch-jit-export version="11",解决: 重新安装就好了

If the demo runs successfully, an image named "output_detection.png" is supposed to be found showing detection objects.

MMDeploy安装笔记的更多相关文章

  1. MonoDevelop 4.2.2/Mono 3.4.0 in CentOS 6.5 安装笔记

    MonoDevelop 4.2.2/Mono 3.4.0 in CentOS 6.5 安装笔记 说明 以root账户登录Linux操作系统,注意:本文中的所有命令行前面的 #> 表示命令行提示符 ...

  2. 基于Ubuntu14.04系统的nvidia tesla K40驱动和cuda 7.5安装笔记

    基于Ubuntu14.04系统的nvidia tesla K40驱动和cuda 7.5安装笔记 飞翔的蜘蛛人 注1:本人新手,文章中不准确的地方,欢迎批评指正 注2:知识储备应达到Linux入门级水平 ...

  3. sublime 安装笔记

    sublime 安装笔记 下载地址 安装package control 根据版本复制相应的代码到console,运行 按要求重启几次后再按crtl+shift+p打开命令窗口 输入pcip即可开始安装 ...

  4. docker在ubuntu14.04下的安装笔记

    本文主要是参考官网教程进行ubuntu14.04的安装. 下面是我的安装笔记. 笔记原件完整下载: 链接: https://pan.baidu.com/s/1dEPQ8mP 密码: gq2p

  5. ArchLinux 安装笔记:续 --zz

    续前话 在虚拟机里调试了几天,终于鼓起勇气往实体机安装了,到桌面环境为止的安装过程可以看我的前一篇文章<ArchLinux 安装笔记>.桌面环境我使用的是 GNOME,虽然用了很长一段时间 ...

  6. Hadoop1.x与2.x安装笔记

    Hadoop1.x与2.x安装笔记 Email: chujiaqiang229@163.com 2015-05-09 Hadoop 1.x 安装 Hadoop1.x 集群规划 No 名称 内容 备注 ...

  7. PHP7安装笔记

    PHP7安装笔记 时间 -- :: 喵了个咪 原文 http://www.hdj.me/php7-install-note 主题 PHP # 安装mcrypt yum install -y php-m ...

  8. python 库安装笔记

    python 库安装笔记 zoerywzhou@163.com http://www.cnblogs.com/swje/ 作者:Zhouwan 2017-2-22 友情提示 安装python库的过程中 ...

  9. 开始使用gentoo linux——gentoo安装笔记(下)

    gentoo安装笔记(下) 上一章,已经对操作系统安装做了充分准备,并且已经从livecd(u盘系统)切换进入了gentoo安装环境中. 不过现在才是真正的开始!打起精神!这可不是在装ubuntu! ...

随机推荐

  1. .map() vs .forEach() vs for() 如何选择?

    访问原文地址 .map() vs .forEach() vs for() 笔者说,自己基本没怎么用过for()来遍历,主要是用.forEach(). 但是总是会被很多朋友说,这些人认为for()的速度 ...

  2. 从零开始:微信小程序新手入门宝典《一》

    为了方便大家了解并入门微信小程序,我将一些可能会需要的知识,列在这里,让大家方便的从零开始学习: 一:微信小程序的特点 张小龙:张小龙全面阐述小程序,推荐通读此文: 小程序是一种不需要下载.安装即可使 ...

  3. web页面性能优化之接口前置

    上个Q做了一波web性能优化,积累了一点点经验 记录分享一下. 先分享一个比较常用的接口前置 的优化方案吧 优化前首屏秒开大约在40%左右 首屏秒开大约提高了25% 先发一张优化成果图 前置原因 对于 ...

  4. 关于recyclerview其item数据重复问题

    查找方法(query)的list只定义对象,不实例化,等到要添加的时候,再new一个新的对象出来. 千万不要如下图这样,否则item显示出来的永远是最新数据. (这个bug找了两天,还是基本功不扎实, ...

  5. java中当static块和构造函数同时出现,顺序是?

    静态块先于构造函数执行 class Student {    int age;    String name;    static int count;    public Student() {   ...

  6. Mybatis插入数据

    对上文->Mybatis快速入门-<进行代码修改 1.在UserMapper.xml中添加插入操作 <!-- 插入操作--> <insert id="save& ...

  7. @RequestBody和@RequestParam注解以及返回值,ajax相关知识点

    关于前后端传递json数据这块查了好多资料,好多地方还是不清楚,先记录一下清楚的地方. 如果我们前端使用ajax发json数据,一般都加上contentType:'application/json;c ...

  8. 『忘了再学』Shell基础 — 9、Bash中的特殊符号(一)

    目录 1.双单引号 2.双引号 3.$符号 4.反引号 5.$()符号 6.#符号 7.\符号 1.双单引号 '':单引号.在单引号中所有的特殊符号,如$和"`"(反引号)都没有特 ...

  9. Codeforces Round #677 (Div. 3) D. Districts Connection思维1200

    题目链接 Problem - 1433D - Codeforces 题目 美好的一天,从看不懂题目开始~~ Example input 4 5 1 2 2 1 3 3 1 1 1 4 1 1000 1 ...

  10. Junit单元测试:

    * 测试分类: 1. 黑盒测试:不需要写代码,给输入值,看程序是否能够输出期望的值. 2. 白盒测试:需要写代码的.关注程序具体的执行流程. * Junit使用:白盒测试 * 步骤: 1. 定义一个测 ...