Description The watchdog module used by the company’s SOC is Synopsys’ IP. Requirements Users sometimes do some development in uboot/kernel and add some new functions (OTA upgrade, etc.), which may cause problems such as uboot/kernel startup crash or even device freeze. It is necessary to enable watchdog during the uboot startup phase to monitor the […]
Tag: watch
[Transfer] The difference between watch and watchEffect (vue3)
The watch function and the watchEffect function are both listeners. There are certain differences in writing and usage. They are two different forms of the same function, but the bottom layer is the same. Comparison between watch and watchEffect watch Watch explicitly specifies dependent data, and executes a callback function when the dependent data is […]
3. Watch listeners, filters and computed properties in vue
watch, computed properties and filters 1. watch (listener) ==1, 1 shallow monitoring== 1.2 Deep monitoring 1.3 Summary 2. filter (filter) 2.1 Local filter 2.2 Global filter ==3. computed(computed attribute)== 3.1 Basic use of computed 3.2 Summary 3. 3 Shopping cart case 1. watch(listener) 1, 1 shallow monitoring Function: Monitor changes in data data grammar: new […]
Based on STM32HAL library (independent watchdog)-brief description
Table of Contents Overview 1. Development environment 2. STM32CubeMx configuration 3. Encoding 4. Operation results 5. Summary Overview A mature and reliable project is inseparable from the “watchdog” option. Every program written by people will have bugs (or the chip peripherals are interfered by the outside world, causing the faulty program to get stuck or […]
Based on STM32HAL library (window watchdog)-brief description
Table of Contents Overview 1. Development environment 2. STM32CubeMx configuration 3. Encoding 4. Operation results 5. Summary Overview A mature and reliable project is inseparable from the “watchdog” option. Every program written by people will have bugs (or the chip peripherals are interfered by the outside world, causing the faulty program to get stuck or […]
Millions of levels of import and export, watch me do this
Blog: xiaohugg.top Background I believe that in business, there will be a lot of data import and export, which generally involves the import and export of millions of data levels. Without an excellent performance architecture, it is easy to cause OOM and cause the server to crash, so I wrote this article. Simply write down […]
Selenium + Nightwatch automated testing environment construction
Start building 1. Create project Let’s find a place to create a new directory, name it “my-test-toolkit”, and then use the terminal in the directory to run npm init -y to generate the project configuration file< strong>package.json. 2. Installation tools Then we will install Selenium and Nightwatch. Install selenium-standalone: npm install selenium-standalone –save-dev Install Nightwatch: […]
IOS custom watch face, scale value and pointer support color gradient
Due to business needs, a customized dial control 1: Scale values and pointers support color gradients 2: Because I wrote it all by myself and use it myself, there are not many ways to modify it. If you want to use it, you can take a good look at the source code. The implementation principle […]
Practical analysis of dump and strace commands causing watchdog problems caused by keystore deadlock
1. Problem description Recently, a system stuck problem occurred. It is speculated that a watchdog appears in system_server. Looking at the watchdog file, it is PackageManager stuck in the KeyStore.clearUid() interface: —– pid 1091 at 2023-10-26 09:40:10 —– Cmd line: system_server ABI: ‘arm64’ “PackageManager” sysTid=1352 #00 pc 000000000006e1c4 /system/lib64/libc.so (__ioctl + 4) #01 pc 00000000000290d0 […]
Redisson’s watchdog strategy – a mechanism to ensure the security and stability of Redis data
Foreword Custom redis distributed locks cannot be automatically renewed. For example, a lock is set to be released with a timeout of 1 minute. If the thread that obtains the lock does not complete execution within one minute, the lock will be obtained by other threads, which may cause This leads to serious online problems. […]