qt5.15 msvc静态编译

15 天前 | 折腾 | justchen | 暂无评论 | 50 views

E:\sourcecode\tmp\qt-everywhere-src-5.15.9\configure.bat -static -static-runtime -release -platform win32-msvc -prefix D:\Qt\Static5.15 -confirm-license  -opensource -nomake examples -nomake tests -opengl desktop -no-icu -skip qtwebengine -mp

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E:\sourcecode\tmp\qt-everywhere-src-5.15.9\configure.bat -static -static-runtime -release -platform win32-msvc -prefix D:\Qt\Static5.15 -confirm-license -opensource -nomake examples -nomake tests -opengl desktop -no-icu -skip qtwebengine -mp

QT智能指针与裸指针的性能对比测试

2023/03/22 | 嵌入式笔记 | justchen | 暂无评论 | 238 views

代码是gpt直接生成的，感觉没毛病

#include <QCoreApplication>
#include <QDebug>
#include <QSharedPointer>
#include <chrono>

class MyClass {
public:
    MyClass(int value) : value_(value) {}
    int getValue() const { return value_; }
private:
    int value_;
};

void testSharedPointer() {
    auto startTime = std::chrono::high_resolution_clock::now();

    for (int i = 0; i < 30000000; ++i) {
        QSharedPointer<MyClass> ptr(new MyClass(i));

        // 多次参数传递
        func1(ptr);
    }

    auto endTime = std::chrono::high_resolution_clock::now();
    auto elapsedTime = std::chrono::duration_cast<std::chrono::milliseconds>(endTime - startTime).count();
    qDebug() << "QSharedPointer elapsed time:" << elapsedTime << "ms";
}

void func1(QSharedPointer<MyClass> ptr) {
    // 参数传递
    func2(ptr);
}

void func2(QSharedPointer<MyClass> ptr) {
    // 参数传递
    func3(ptr);
}

void func3(QSharedPointer<MyClass> ptr) {
    int value = ptr->getValue();
    Q_UNUSED(value);
}

void testBarePointer() {
    auto startTime = std::chrono::high_resolution_clock::now();

    for (int i = 0; i < 30000000; ++i) {
        MyClass* ptr = new MyClass(i);

        // 多次参数传递
        func4(ptr);
        delete ptr;
    }

    auto endTime = std::chrono::high_resolution_clock::now();
    auto elapsedTime = std::chrono::duration_cast<std::chrono::milliseconds>(endTime - startTime).count();
    qDebug() << "Bare pointer elapsed time:" << elapsedTime << "ms";
}

void func4(MyClass* ptr) {
    // 参数传递
    func5(ptr);
}

void func5(MyClass* ptr) {
    // 参数传递
    func6(ptr);
}

void func6(MyClass* ptr) {
    int value = ptr->getValue();
    Q_UNUSED(value);
}

int main(int argc, char *argv[])
{
    QCoreApplication a(argc, argv);

    testSharedPointer();
    testBarePointer();

    return a.exec();
}

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#include <QCoreApplication>

#include <QDebug>

#include <QSharedPointer>

#include <chrono>

class MyClass {

public:

MyClass(int value) : value_(value) {}

int getValue() const { return value_; }

private:

int value_;

};

void testSharedPointer() {

auto startTime = std::chrono::high_resolution_clock::now();

for (int i = 0; i < 30000000; ++i) {

QSharedPointer<MyClass> ptr(new MyClass(i));

// 多次参数传递

func1(ptr);

}

auto endTime = std::chrono::high_resolution_clock::now();

auto elapsedTime = std::chrono::duration_cast<std::chrono::milliseconds>(endTime - startTime).count();

qDebug() << "QSharedPointer elapsed time:" << elapsedTime << "ms";

}

void func1(QSharedPointer<MyClass> ptr) {

// 参数传递

func2(ptr);

}

void func2(QSharedPointer<MyClass> ptr) {

// 参数传递

func3(ptr);

}

void func3(QSharedPointer<MyClass> ptr) {

int value = ptr->getValue();

Q_UNUSED(value);

}

void testBarePointer() {

auto startTime = std::chrono::high_resolution_clock::now();

for (int i = 0; i < 30000000; ++i) {

MyClass* ptr = new MyClass(i);

// 多次参数传递

func4(ptr);

delete ptr;

}

auto endTime = std::chrono::high_resolution_clock::now();

auto elapsedTime = std::chrono::duration_cast<std::chrono::milliseconds>(endTime - startTime).count();

qDebug() << "Bare pointer elapsed time:" << elapsedTime << "ms";

}

void func4(MyClass* ptr) {

// 参数传递

func5(ptr);

}

void func5(MyClass* ptr) {

// 参数传递

func6(ptr);

}

void func6(MyClass* ptr) {

int value = ptr->getValue();

Q_UNUSED(value);

}

int main(int argc, char *argv[])

{

QCoreApplication a(argc, argv);

testSharedPointer();

testBarePointer();

return a.exec();

}

在上述示例代码中，我们定义了一个名为 MyClass 的类，它包含一个整型成员变量。然后，我们分别实现了两个函数：testSharedPointer 和 testBarePointer，用于测试 QSharedPointer 指针和裸指针……

Git 中出现 ^M 解决方案

2023/02/11 | 嵌入式笔记 | justchen | 暂无评论 | 251 views

下面简单的方法可以让git diff的时候忽略换行符的差异： git config –global core.whitespace cr-at-eol 对于已经被修改的文件.使用dos2unix批量替换

# 单个文件直接
dos2unix.exe xxx.file

# 多个文件使用 xargs处理
find ./ -name "*" | xargs dos2unix

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# 单个文件直接

dos2unix.exe xxx.file

# 多个文件使用 xargs处理

find ./ -name "*" | xargs dos2unix

windows server2022 使用记录

2022/11/07 | 折腾 | justchen | 暂无评论 | 687 views

安装hypyer-v

# powershell
Add-WindowsFeature Hyper-V,Hyper-V-Tools,Hyper-V-PowerShell -IncludeManagementTools
Restart-Computer -Force

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# powershell

Add-WindowsFeature Hyper-V,Hyper-V-Tools,Hyper-V-PowerShell -IncludeManagementTools

Restart-Computer -Force

创建虚拟机及虚拟交换机过程略 PCIE直通虚拟机参考 https://www.licc.tech/article?id=35 先禁用相关PCIE设备复制PCIE路径信息,如下图则是PCIROOT(0)#PCI(1C04)#PCI(0000) 然后p……

git ssh端口非22端口解决方案

2022/09/07 | 折腾 | justchen | 暂无评论 | 539 views

对于新项目 git clone ssh://git@xxxx.com:22222/xxxxx/xxx.git 对于已经存在的项目，修改 .git/config 中仓库路径为上面的格式

gitea 无法ssh clone push解决

2022/09/07 | 折腾 | justchen | 暂无评论 | 585 views

首先确认ssh key已经添加，但还是无法push， docker后台提示Authentication refused: bad ownership or modes for directory /data/git/.sshAuthentication refused: bad ownership or modes for directo……

替换垃圾WIN11的任务栏，支持任务不合并

2022/04/23 | 折腾 | justchen | 暂无评论 | 796 views

使用工具： https://github.com/valinet/ExplorerPatcher

Linux实时监控网卡网速及流量

2021/07/28 | 嵌入式笔记 | justchen | 暂无评论 | 1609 views

脚本查看实时速度

#!/bin/bash

ethn=$1

while true
do
  RX_pre=$(cat /proc/net/dev | grep $ethn | sed 's/:/ /g' | awk '{print $2}')
  TX_pre=$(cat /proc/net/dev | grep $ethn | sed 's/:/ /g' | awk '{print $10}')
  sleep 1
  RX_next=$(cat /proc/net/dev | grep $ethn | sed 's/:/ /g' | awk '{print $2}')
  TX_next=$(cat /proc/net/dev | grep $ethn | sed 's/:/ /g' | awk '{print $10}')

  clear
  echo -e "\t RX `date +%k:%M:%S` TX"

  RX=$((${RX_next}-${RX_pre}))
  TX=$((${TX_next}-${TX_pre}))

  if [[ $RX -lt 1024 ]];then
    RX="${RX}B/s"
  elif [[ $RX -gt 1048576 ]];then
    RX=$(echo $RX | awk '{print $1/1048576 "MB/s"}')
  else
    RX=$(echo $RX | awk '{print $1/1024 "KB/s"}')
  fi

  if [[ $TX -lt 1024 ]];then
    TX="${TX}B/s"
  elif [[ $TX -gt 1048576 ]];then
    TX=$(echo $TX | awk '{print $1/1048576 "MB/s"}')
  else
    TX=$(echo $TX | awk '{print $1/1024 "KB/s"}')
  fi

  echo -e "$ethn \t $RX   $TX "

done

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#!/bin/bash

ethn=$1

while true

do

RX_pre=$(cat /proc/net/dev | grep $ethn | sed 's/:/ /g' | awk '{print $2}')

TX_pre=$(cat /proc/net/dev | grep $ethn | sed 's/:/ /g' | awk '{print $10}')

sleep 1

RX_next=$(cat /proc/net/dev | grep $ethn | sed 's/:/ /g' | awk '{print $2}')

TX_next=$(cat /proc/net/dev | grep $ethn | sed 's/:/ /g' | awk '{print $10}')

clear

echo -e "\t RX `date +%k:%M:%S` TX"

RX=$((${RX_next}-${RX_pre}))

TX=$((${TX_next}-${TX_pre}))

if [[ $RX -lt 1024 ]];then

RX="${RX}B/s"

elif [[ $RX -gt 1048576 ]];then

RX=$(echo $RX | awk '{print $1/1048576 "MB/s"}')

else

RX=$(echo $RX | awk '{print $1/1024 "KB/s"}')

fi

if [[ $TX -lt 1024 ]];then

TX="${TX}B/s"

elif [[ $TX -gt 1048576 ]];then

TX=$(echo $TX | awk '{print $1/1048576 "MB/s"}')

else

TX=$(echo $TX | awk '{print $1/1024 "KB/s"}')

fi

echo -e "$ethn \t $RX $TX "

done

使用 watch watch -n 1 “ifconfig eth0” watch -n 1 “cat /proc/net/dev”

密码保护：FFMPEG log

2021/04/29 | 嵌入式笔记 | justchen | 暂无评论 | 1824 views

无法提供摘要。这是一篇受保护的文章。

i2cdetect 工具简单使用

2021/02/26 | 嵌入式笔记 | justchen | 暂无评论 | 1812 views

列出所有I2C设备 i2cdetect -l 返回

i2c-3   i2c             xiic-i2c                                I2C adapter
i2c-1   i2c             Cadence I2C at ff020000                 I2C adapter
i2c-2   i2c             Cadence I2C at ff030000                 I2C adapter
i2c-0   i2c             xiic-i2c                                I2C adapter

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i2c-3 i2c xiic-i2c I2C adapter

i2c-1 i2c Cadence I2C at ff020000 I2C adapter

i2c-2 i2c Cadence I2C at ff030000 I2C adapter

i2c-0 i2c xiic-i2c I2C adapter

列出总线上所有有回应的设备

i2cdetect -y -r 1
     0  1  2  3  4  5  6  7  8  9  a  b  c  d  e  f
00:          -- -- -- -- -- -- -- -- -- -- -- -- --
10: -- -- -- -- -- -- -- -- 18 -- -- -- -- -- -- --
20: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
30: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
40: -- -- -- -- -- -- -- -- UU -- -- -- -- -- -- --
50: -- UU -- -- -- -- -- -- -- -- -- -- -- -- -- --
60: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
70: -- -- -- -- -- -- -- --

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i2cdetect -y -r 1

0 1 2 3 4 5 6 7 8 9 a b c d e f

00: -- -- -- -- -- -- -- -- -- -- -- -- --

10: -- -- -- -- -- -- -- -- 18 -- -- -- -- -- -- --

20: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --

30: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --

40: -- -- -- -- -- -- -- -- UU -- -- -- -- -- -- --

50: -- UU -- -- -- -- -- -- -- -- -- -- -- -- -- --

60: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --

70: -- -- -- -- -- -- -- --

读取某个设备上的 00~FF的内容

i2cdump -f -y 3 0x18
No size specified (using byte-data access)
     0  1  2  3  4  5  6  7  8  9  a  b  c  d  e  f    0123456789abcdef
00: 00 00 00 10 04 00 00 00 00 00 00 01 00 00 00 80    ...??......?...?
10: 80 ff ff 78 78 78 78 78 78 06 00 fe 00 00 fe 00    ?..xxxxxx?.?..?.
20: 00 00 00 00 10 00 00 00 00 00 00 80 80 00 00 00    ....?......??...
30: 00 00 00 04 00 00 00 00 00 00 04 00 00 00 00 00    ...?......?.....
40: 00 04 00 00 00 00 00 00 04 00 00 00 00 00 00 00    .?......?.......
50: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00    ................
60: 00 00 00 00 00 00 02 00 00 00 00 00 00 00 00 00    ......?.........
70: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00    ................
80: 00 00 00 10 04 00 00 00 00 00 00 01 00 00 00 80    ...??......?...?
90: 80 ff ff 78 78 78 78 78 78 06 00 fe 00 00 fe 00    ?..xxxxxx?.?..?.
a0: 00 00 00 00 10 00 00 00 00 00 00 80 80 00 00 00    ....?......??...
b0: 00 00 00 04 00 00 00 00 00 00 04 00 00 00 00 00    ...?......?.....
c0: 00 04 00 00 00 00 00 00 04 00 00 00 00 00 00 00    .?......?.......
d0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00    ................
e0: 00 00 00 00 00 00 02 00 00 00 00 00 00 00 00 00    ......?.........
f0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00    ................

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i2cdump -f -y 3 0x18

No size specified (using byte-data access)

0 1 2 3 4 5 6 7 8 9 a b c d e f 0123456789abcdef

00: 00 00 00 10 04 00 00 00 00 00 00 01 00 00 00 80 ...??......?...?

10: 80 ff ff 78 78 78 78 78 78 06 00 fe 00 00 fe 00 ?..xxxxxx?.?..?.

20: 00 00 00 00 10 00 00 00 00 00 00 80 80 00 00 00 ....?......??...

30: 00 00 00 04 00 00 00 00 00 00 04 00 00 00 00 00 ...?......?.....

40: 00 04 00 00 00 00 00 00 04 00 00 00 00 00 00 00 .?......?.......

50: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................

60: 00 00 00 00 00 00 02 00 00 00 00 00 00 00 00 00 ......?.........

70: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................

80: 00 00 00 10 04 00 00 00 00 00 00 01 00 00 00 80 ...??......?...?

90: 80 ff ff 78 78 78 78 78 78 06 00 fe 00 00 fe 00 ?..xxxxxx?.?..?.

a0: 00 00 00 00 10 00 00 00 00 00 00 80 80 00 00 00 ....?......??...

b0: 00 00 00 04 00 00 00 00 00 00 04 00 00 00 00 00 ...?......?.....

c0: 00 04 00 00 00 00 00 00 04 00 00 00 00 00 00 00 .?......?.......

d0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................

e0: 00 00 00 00 00 00 02 00 00 00 00 00 00 00 00 00 ......?.........

f0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................

i2c 写 i2cset ……

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