Get the source code at the end Development language: Java Java development tools: JDK1.8 Backend framework: SSM Frontend: Vue Database: MySQL5.7 combined with Navicat management tool Server: Tomcat8.5 Development software: IDEA/Eclipse Is it a Maven project: Yes Table of Contents 1. Project Introduction 2. System functions 3. System project screenshots Ordinary user management Ordinary administrator […]
Tag: trace
Linux debugging (objdump/strace/strings)
Directory 1. Linux debugging (objdump/strace/strings) 1.1. Check the system glibc version number 1.2. View dependencies in so/bin 1.3. Reasons for debugging bin errors 1.4. View the string in so/bin 1. Linux debugging (objdump/strace/strings) 1.1. Check the system glibc version number 1. The first type # ldd –version ldd (Ubuntu GLIBC 2.27-3ubuntu1) 2.27 Copyright (C) 2018 […]
SpringBoot logback log printing adds trace_uuid tracking interface request output log (including thread pool unified configuration)
In order to facilitate project log query, you can add a custom identifier to the log configuration file and add a uuid to the log header to achieve the purpose of adding a unique identifier for the same interface request identifier. Here’s a simple way: 1. By looking at the slf4j source code comments, the […]
Android Performance Optimization Series – 01 Teach you step by step how to use systrace
1. Overview Performance optimization is an important knowledge in Android and an important basis for measuring the level of an Android engineer. Many people may know simple performance optimization. For example, many people must know the following methods to optimize UI rendering: Use “Settings –> Developer Options –> Debugging GPU overdrawing” to distinguish whether there […]
MIT 6.s081 lab2.1–trace [clear thinking explanation version]
MIT 6.s081 lab2.1–trace No.1 words written in front I was very excited. When I followed the answer twice to do this experiment, I still had no clue. Now I started over again, thinking on my own without relying on the answer, and passed smoothly! Progress! It is necessary to emphasize: Be sure to understand the […]
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 […]
Packet Tracer – VLAN configuration
Address allocation table Equipment Interface IP address Subnet Mask VLAN PC1 NIC 172.17.10.21 255.255.255.0 10 PC2 NIC 172.17.20.22 255.255.255.0 20 PC3 NIC 172.17.30.23 255.255.255.0 30 PC4 NIC 172.17.10.24 255.255.255.0 10 PC5 NIC 172.17.20.25 255.255.255.0 20 PC6 NIC 172.17.30.26 255.255.255.0 30 Target Part 1: Verify Default VLAN Configuration Part 2: Configuring VLANs Part 3: Assign VLANs […]
Packet Tracer – Configure initial switch settings
Goals Part 1: Verify Default Switch Configuration Part 2: Configure basic switch configuration Part 3: Configure the MOTD banner Part 4: Save Configuration File to NVRAM Part 5: Configure S2 Background/Scene In this exercise, you perform basic switch configuration tasks. You want to protect access to the command line interface (CLI) and console ports using […]
Trace a function defined in a model
reason The event file is too large to trace a total model, which couldn’t be opened by brower, trace every functions in the model is an alternative method. here to donwload pytorch_utils.py import torch import torch.nn as nn from pytorch_utils.modules import MLP EPS = 1e-8 class WorkingMemory(nn.Module): def __init__(self, device=’cpu’, mem_type=’vanilla’, num_cells=10, mem_size=300, mlp_size=300, dropout_rate=0.5, […]
Trace delivers best practices in a multi-threaded asynchronous system
Common implementation methods of JAVA thread asynchronous are: new Thread ExecutorService Of course, there are others, such as fork-join, which will be mentioned below. The following mainly focuses on these two scenarios for practice with DDTrace and Springboot. Introducing DDTrace sdk <properties> <java.version>1.8</java.version> <dd.version>1.21.0</dd.version> </properties> <dependencies> <dependency> <groupId>com.datadoghq</groupId> <artifactId>dd-trace-api</artifactId> <version>${dd.version}</version> </dependency> <dependency> <groupId>io.opentracing</groupId> <artifactId>opentracing-api</artifactId> <version>0.33.0</version> […]