Content preview The first article in the learn X in 5 series. This article mainly introduces the process delay statistics method and rawtracepoint. runqlat “Why does the application freeze under high load scenarios”, “Why is process A not scheduled?”. When we have such questions in our work and life, the scheduling delay of the target […]
Tag: minute
LINUX Talk (Spend 10 minutes to learn blind box knowledge points) (perror, O_CREAT|O_RDWR, S_IRWXU, lseek, dup, system, struct stat statbuf, regular file bits)
ok friends, without further ado, let’s take a look at the code below! First question: if(fd1< 0) { perror(“open :”); printf(“errno is:%d \ “,errno); This code is used to handle the situation where the file fails to open: The open() function will return a non-negative file descriptor when the file is successfully opened, and -1 […]
SSM backend development minutes
Table of Contents introduction technology stack Knowledge points interface Static class accomplish Spring MyBatis SpringMVC SpringBoot question Introduction Recently, I need to complete the development of the backend of a management system. During the summer training of my sophomore year, I learned the backend framework, including springBoot, mybatis, spring, springMVC, etc. However, the study period […]
L2-014 Train dispatching 25 minutes (set container solution)
The structure of the train dispatching track at the railway station is shown in the figure below. There is an entrance track and an exit track at both ends, and there are N parallel tracks between them. Each train can choose any track to enter from the entrance and finally leave from the exit. There […]
STM32F103C8T6 configures RTC to display year, month, day, hour, minute and second (calendar)
1. Introduction to RTC 1. Main block diagram 2. Introduction The RTC module has a set of continuous counting counters, which can provide clock calendar functions under the corresponding software configuration. Modifying the counter value can reset the current time and date of the system. RTC Module and clock configuration system (RCC_BDCR register ) In […]
[RabbitMQ in action] 01 Install RabbitMQ on Linux in 3 minutes
This section uses docker to install RabbitMQ. The image used is bitnami. Bitnami is a company that provides Docker images and software packages for various popular applications. Using docker, we can run the program we want to install in 3 minutes. I have to say it’s really convenient. Okay, let’s get started. Prerequisites for use: […]
The datetime type in el-date-picker disables dates containing time and minutes
It’s a very confusing situation. For the disabled time under the datetime type, the timestamp is disabled in pickerOptions, but the time division cannot be disabled. Idea: disabledDate in pickerOptions disables overall date selection Disable time range through selectableRange Disadvantage: still cannot disable the second range // view interface <el-date-picker v-model=”remindTime” type=”datetime” placeholder=”Select time” value-format=”timestamp” […]
vue3+vant4 encapsulates date and time components (year, month, day, hour, minute and second)
Vant4 currently cannot directly use the year, month, day, hour, minute and second components that come with vant3. After comprehensive consideration, I decided to package one myself! vue3 + vant4 encapsulates date and time components (year, month, day, hour, minute and second) renderings code segment Core component code introduce Renderings Code snippet Core component code […]
[Code] Xilinx + Vivado + digital clock (hours, minutes and seconds) + LED indication
[Code][Xilinx + Vivado + Digital Clock (Hours, Minutes and Seconds) + LED Indication] Practice Project Final effect (no picture) The count is accumulated once every sec every 1 second and is cleared after 59 times; The min count accumulates once every 1 minute and is cleared after 59 times; The hour count accumulates once every […]
Testbench file writing minutes (Verilog)
Follow, star public account, wonderful content delivered every day Source: Internet material Before using Verilog for FPGA projects and other occasions, I wrote some testbench files for hands-on practice. When I first wrote a few times, I didn’t remember some basic things every time. Not proficient, I was a little proficient when I wrote it […]