This article mainly introduces the program memory allocation problem under Ubuntu and stm32, as well as the address allocation problem of heap, stack, global, local and other variables. Table of Contents Preface 1. Task requirements 2. Experimental process 2.1 Learn and master the compilation and assembly process of executable programs 2.1.1gcc generates executable dynamic static […]
Tag: location
Kafka – 3.x partition allocation strategy and rebalancing incomplete guide
Article directory Production experience – partition allocation strategy and rebalancing Range and rebalancing of producer partition allocation Range partitioning strategy principle Range partition allocation strategy and rebalancing case RoundRobin strategy and rebalancing of producer partition allocation RoundRobin partition strategy principle RoundRobin partition allocation strategy and rebalancing case Sticky and rebalancing of producer partition allocation Sticky […]
[C Language] Dynamic allocation and release of memory
Personal homepage: Xiu Xiu Ye Column: C language Operating environment:Visual Studio 2022 ? Table of Contents What is dynamic allocation of memory? Memory dynamic allocation function malloc() calloc() realloc() Dynamic memory release function free() Common dynamic memory errors 1. Dereference operation of NULL pointer 2. Out-of-bounds access to dynamically opened space 3. Use free release […]
Linux physical page allocation algorithm—-partner algorithm
Foreword The content of this chapter focuses on the partner algorithm in the Linux physical page allocation algorithm. However, it is a bit too far-fetched to directly introduce this algorithm, so we first analyze when physical page allocation starts: (The source code in this article is from kernel version 5.15) Linux uses the “request paging” […]
How does the Android GB28181 device access module implement real-time location subscription (MobilePosition)
Technical background Real-time location (MobilePosition) subscription and reporting is particularly important for GB28281 device access terminals, such as mobile individual soldier equipment, law enforcement recorders, smart helmets, vehicle-mounted terminals, etc. Android national standard access devices obtain real-time longitude and latitude information, and according to certain The national standard service platform dynamically displays the positioning information […]
Use Google’s location autocomplete feature
1. Foreword When developing overseas, you need to use Google Maps. Here we record the development of the automatic completion function of locations. The focus here is on code development, and key application and configuration will not be recorded. 2. Basic configuration build.gradle under the app folder plugins {<!– –> // … id ‘com.google.android.libraries.mapsplatform.secrets-gradle-plugin’ } […]
Solve Vue error: Uncaught (in promise) NavigationDuplicated: Avoided redundant navigation to current location
1. When clicking navigation repeatedly, an error message appears on the console Solution: Option 1: Just add the following code under the router folder: import Vue from ‘vue’ import VueRouter from ‘vue-router’ import Home from ‘@/views/Home’ import Main from ‘@/views/Main’ import User from ‘@/views/User’ Vue.use(VueRouter) // 0. If you use the modular mechanism to program […]
Garbage collector and memory allocation strategy
Overview There are three things garbage collection needs to accomplish: What memory needs to be recycled? When will it be recycled? How to recycle? Algorithm for determining whether objects are alive: Reference counting method: Add a reference counter to the object. Whenever there is a reference, the counter value is incremented by 1; when the […]
Smooth upgrade adds echo module, location configuration, and rewrite configuration
Smooth upgrade adds echo module, location configuration, and rewrite configuration Smooth upgrade process: Get compilation information of old versions Old version backup Compile a new version or new function (make install cannot be executed) Manually replace with new version and restart Verify new version Environmental preparation Operating system Old version New version New features CentOS-8 […]
Linux memory management–physical memory allocation
1. First Fit Dispenser The First Fit allocator is the most basic memory allocator, which uses a bitmap instead of a list of free blocks to represent memory. In the bitmap, if the corresponding bit of the page is 1, it means that the page has been allocated, and if it is 0, it means […]