Tag: hotspot

Analysis of Java HotSpot(TM) 64-Bit Server VM warning: CodeCache is full. Compiler has been disabled.Java Hot

Table of Contents Analysis of Java HotSpot(TM) 64-Bit Server VM warning: CodeCache is full. Compiler has been disabled. What is CodeCache? Why is CodeCache full? How to solve the problem of CodeCache being full? 1. Increase the size of CodeCache 2. Optimize application usage in conclusion Practical application scenario example: concurrent request processing Analysis Java […]

Internet public opinion hotspot analysis system based on sentiment analysis Computer Competition

Article directory 0 Preface 1. Background of the topic 2 Data processing 3 Text Sentiment Analysis 3.1 Sentiment analysis-vocabulary construction 3.2 Implementation of text sentiment analysis 3.3 Establish an emotional tendency analysis model 4 Data Visualization Tools 4.1 Introduction to django framework 4.2 ECharts 5 Django uses echarts for visual display 5.1 Modify setting.py to […]

[Microservice Protection] Sentinel Flow Control Rules – In-depth exploration of Sentinel’s flow control mode, flow control effects, and flow limiting of hotspot parameters

Article directory Preface 1. Quickly master the use of Sentinel 1.1 What is a cluster point link? 1.2 Simple usage example of Sentinel 2. Sentinel flow control mode 2.1 Direct mode 2.2 Association mode 2.3 Link mode 3. Flow control effect 3.1 Fail fast 3.2 Preheating mode 3.3 Waiting in line 4. Flow control of […]

RK3568 RTL8821cs adapts to WPA3 connection and WPA3 hotspot configuration

kernel:4-19 SOC: RK3568 system:Android12 Module: RTL8821CS For debugging methods, you can see the previous Zhengji AP6256 1. Driver configuration: First, the device tree is configured as follows: Because the SDIO voltage is 1.8V, sd-uhs-sdr104 must be added; &sdio_pwrseq{ compatible = “mmc-pwrseq-simple”; clocks = < & amp;pmucru CLK_RTC_32K>; pinctrl-names = “default”; pinctrl-0 = < & amp;wifi_enable_h>; […]

When turning on a wifi hotspot, how do you know who is connected?

Having seen the SoftAp process before, we all know that after the button is opened on the interface, it will eventually be transferred to the SoftApManager class. Here we choose the code of Android 13 to take a look: http://aospxref.com/android-13.0.0_r3/xref/packages/modules/Wifi/service/java/com/android/server/wifi/SoftApManager.java private int startSoftAp() { Log.d(getTag(), “startSoftAp: band ” + mCurrentSoftApConfiguration.getBand() + ” iface ” + […]

HotSpot algorithm implementation

1. Enumeration of root nodes We use the reachability analysis algorithm to find global references (such as constants or class static properties) or execution context (such as local variables in the stack frame) from GC Roots. Although our goal is very clear, with Java With the continuous expansion, there are many constants and static variables […]

openjdk-jdk8-b109 hotspot virtual machine startup process analysis_1

Analysis of jdk8-b109 version based on OpenJdk tag HotSpot is an implementation of the Java Virtual Machine (JVM) developed by Oracle and is one of the most widely used JVMs. Find the hotspot virtual machine entrance After completing the compilation configuration, the Makefile will be generated in the root directory. How to compile jdk8 for […]

SpringCould microservice protection 02 – three flow control modes (direct, association, link) and four flow control effects (fast fail, Worm up, queue waiting, hotspot parameter current limiting) (Sentinel component advanced option selection + Jmeter pressure test demonstration)

Directory 2. Flow control 2.1.Cluster point link 2.1.Quick Start 2.1.1.Example 2.1.2. Exercise: 2.2.Flow control mode 2.2.1. Association mode 2.2.2.Link mode 1) Add a method to query products 2) When querying an order, query the product 3) Add an order and check the product 4) Add resource tags to the query products 5) Add flow control […]

Dark Horse Comments-07 Cache breakdown problem (hotspot key failure) and solution, mutex lock and setting logical expiration time

Cache breakdown problem (hotspot key invalidation) The cache breakdown problem is also called the hot key problem. It means that a key that is accessed by highly concurrently and has a complicated cache rebuilding business suddenly fails. At this time, countless requests and accesses will hit the database in an instant. , brings huge impact […]