Source code migration from X86 platform to Kunpeng platform based on Kunpeng development kit [play with Huawei cloud]

Preface

Kunpeng analysis scanning tool and code migration tool , Provide comprehensive application portability assessment and code migration guidance , Realization 90% Of C/C++ Code 、50% Assembly code and 80% Automatic migration of dependent libraries for , Reduce labor costs 50%, Accelerate code migration and optimization . And Kunpeng cloud has a strong ecosystem , The following pictures introduce some cloud services of kunpengyun , If you are interested, you can go to Kunpeng community to learn about it . Because I have received the training of Kunpeng series before , For a long time , So let's try Kunpeng's code migration development kit again .

Specific process

Premise of operation ： Log in to Huawei cloud account And real name

1. Use your mobile number to register your Huawei cloud account ： Click registration

2. Click here to finish Real name authentication , The account type is " personal ", The type of personal certification is recommended " Code scanning authentication ". 

   

Experimental summary

• Premise of operation ：
• 1. Installation tools xshell
• 2. To configure Visual Studio Code Environmental Science
• 3. Source code preparation
• 4. Source code migration

Installation tools xshell

Before connecting, you need to create a Huawei cloud ECs , I'm not going to do that here .

Use xshell The tool directly inputs the elastic public network you created IP Connect with the password ,xshell yes windows The system is often used ssh Connection tool , You can download and install by yourself , Download links are not available here , Smart, you will .

Prepare the tool source code package

stay xshell Execute the following command in the window to download the source package ：

wget https://mirror.iscas.ac.cn/kunpeng/archive/Porting_Dependency/Packages/Porting-advisor_2.3.0_linux-Kunpeng.tar.gz

Download succeeded, as shown in the figure below ：

Execute the following command to unzip the source package ：

tar -zxvf Porting-advisor_2.3.0_linux-Kunpeng.tar.gz

install porting Tools

Execute the following command to enter the unzipped source package directory ：

Perform the following installation porting Tools ：

When the execution process requires input, just press enter .【 About waiting 2-3 minute 】 The installation is successful as shown in the figure below ：

./install web

Install dependent tools cmake

Execute the following command to download cmake Tools ：

cd ~ && wget https://sandbox-experiment-resource-east-1.obs.cn-east-3.myhuaweicloud.com/code-migration-cn-east-3/cmake-3.3.2.tar.gz

The successful download is as follows

Execute the following command to unzip cmake Installation package ：

tar -xzvf cmake-3.3.2.tar.gz

Execute the following command to compile cmake：

cd cmake-3.3.2 && ./configure

【 About waiting 2-3 minute 】 The compilation is successful as shown in the figure below ：

Execute the following commands in sequence to install cmak Tools ：

gmakemake install

【 About waiting 3-4 minute 】 The installation is successful as shown in the figure below ：

To configure Visual Studio Code Environmental Science

Switch to xshell, Click on the open “Visual Studio Code”, After opening, click Kunpeng Porting Tool icon , Click on “Configure Server” Configure remote server connection , As shown in the figure below ：

① “Ip Address”： Fill in 1.1 Step to view the public network IP;② “HTTPS Port”： Default （8084）; explain ： Elastic public network of cloud server IP Address , You can move the mouse to the left menu bar in the cloud desktop browser page , Click on “ List of services ”->“ Calculation ”->“ Elastic cloud server ECS” Enter server list , View and copy ;③“Service Certificate Settings”, Can choose “Trust the current service certificate”. Complete Click “Save”, After saving successfully, it is shown in the figure below ：

notes ： If you click Save after , The following prompt appears ：

You need to modify it manually VSCode Proxy server for , Click on settings->Application->proxy“Proxy Strict SSL” The option is unchecked ,“Proxy Support” Set item , Select... From the drop-down box “off”, Then click Save again on the configure server page , As shown in the figure below ：

Click on “Log In”, Create user “portadmin”, Password customization , As shown in the figure below ：

Setup complete click “OK” Complete the remote server connection configuration .

Source code preparation

The downloaded source code package to be scanned can be downloaded in x86 The platform can be compiled normally , adopt “ Kunpeng code migration tool ” After scanning , Identify the codes that need to be adapted and modified on the Kunpeng platform , By modifying the , To achieve the purpose of normal compilation and use on Kunpeng platform , So as to realize source code migration .

cd /opt/portadv/portadmin/sourcecode/

Execute the following command to download Megahit Source code :

git clone https://codehub.devcloud.cn-north-4.huaweicloud.com/experiment00001/megahit.git

Execute the following command to merge the code ：

cd megahit && git submodule update --init

Execute the following command to create the build folder and enter ：

mkdir build && cd build

Execute the following command to generate Makefile file ：

cmake .. -DCMAKE_BUILD_TYPE=Release

Execute the following command to modify megahit Directory group ： explain ：porting The source directory group of the tool to be scanned must be porting To scan .

cd ../ && chown -R porting:porting /opt/portadv/portadmin/sourcecode/* && ll ./

Source code migration

The code scanning tool scans the source code and migrates

choice “Source Code Porting”, Manual input selection “megahit/build” Source package path , Other parameters default , As shown in the figure below ： explain ： If there is a pop-up window when login is successful, click “OK” that will do

Click on “Analyze” The analysis is successful, as shown in the figure below

After analysis , Click on the file list , View the files in the file that need to be migrated , Click on “View Suggestion Code” Check the migration suggestions of specific files . Modify file “megahit_core_popcnt.dir/flags.make”, Drag the mouse to the place to be modified （ Drag right to the end of the current code to see ）, You can see a point to be modified .

Delete the prompt to modify the code , Modified to complete “Ctrl+s” Save the file , as follows

Modify file “cpu_dispatch.h”, Hover the cursor over the code , You can see the modification suggestions

Separate the code that needs to be modified in each part , When the mouse hovers, the “Quick Fix…”, choice “Replace the code with the suggested code” Click... To make changes quickly , As shown in the figure below ：

explain ：“Quick Fix…” When it does not appear, the mouse wheel can be seen by sliding down .

When the modification is completed, remove the modified code comments ,“Ctrl+s” Save the file , Finally, as shown in the figure below ：

Switch to xshell, Execution of the following command will “KunpengTrans.h” Add the header file to the directory /opt/portadv/portadmin/sourcecode/megahit/src/utils：

cp /opt/portadv/tools/inline_asm/config/KunpengTrans.h /opt/portadv/portadmin/sourcecode/megahit/src/utils/

Recompile and verify

stay xshell Command line execution make command

cd /opt/portadv/portadmin/sourcecode/megahit/build && make

Execute the following command to modify “/opt/portadv/portadmin/sourcecode/megahitkmlib/kmrns.h”：

vim /opt/portadv/portadmin/sourcecode/megahit/src/kmlib/kmrns.h

“<x86intrin.h>” by x86 System header file of the platform , stay arm This system header file does not exist on the platform . Click on the keyboard “i” The command enters text input mode , The comments are shown in the following figure ：

explain ：“#include <x86intrin.h>” Change it to “//#include <x86intrin.h>”.

Modified to complete , Click on the keyboard “ESC” Exit input mode , Input ：wq Press enter after the command to save ：

Re execution make command

【 About waiting 6 minute 】 The compilation passes, as shown in the figure below ：

After compilation, execute the following command to verify ： explain ：Make simple_test Used in .fa File is github When you download the software package, it comes with you. There is no need to download it .

make simple_test

Run successfully, as shown in the figure below ：

summary

The elastic cloud server based on Huawei cloud can realize from x86 Platform to Kunpeng Source code migration of the platform . Through this process , I know the ：
① The operation flow of the source code migration function in the Kunpeng code migration tool
② Megahit Project code tuning practice

The overall process of Kunpeng's development kit is very smooth , Scanning and migration functions are also very clear , Can quickly repair your code , Is worth to recommend .