In the world of computer programming, multithreading is a powerful and complex technology that provides programmers with a way to perform multiple tasks at the same time. Python, as a popular programming language, also provides multi-threading support. This article will deeply explore the concept and working principle of multi-threading in Python, and lead you into […]
Tag: locking
Transactions and locking mechanisms in Redis
Transaction and lock mechanism in Redis Redis’s transaction mechanism is a mechanism that packages multiple commands for execution, ensuring that all of these commands either execute successfully or fail without any intermediate status. In Redis, transactions are implemented through four commands: MULTI, EXEC, DISCARD and WATCH. MULTI: This command marks the beginning of a transaction. […]
What are the problems with Redis distributed locking and how to solve them?
Suppose there is a scenario where you buy a ticket on a ticket purchasing software, but there are only one or a few tickets left. At this time, dozens of people are using this software to purchase tickets at the same time. Without considering any impact, the normal logic is to first determine whether there […]
Learn CompletableFuture: Keep your code from blocking!
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Multi-threading case–>Blocking queue
1. What is a blocking queue 1. The blocking queue is a special queue that also adheres to the “first in, first out” principle. 2. The blocking queue can be a thread-safe data structure with the following characteristics: When the queue is full, if you continue to queue, it will be blocked until other threads […]
Publish and subscribe model implemented based on fixed-length blocking message queue [c++]
#include <iostream> #include <vector> #include <queue> #include <thread> #include <mutex> #include <condition_variable> #include <functional> #include <cstring> #include <chrono> // Custom message structure template <typename CallbackType> struct CustomMessage { CallbackType callback; void* data; size_t length; CustomMessage(CallbackType callback, void* data, size_t length) : callback(callback), data(data), length(length) {} CustomMessage() = default; // Add default constructor }; // message […]
Learn CompletableFuture: Keep your code from blocking!
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18 | Reactive programming framework design: How to make program calls respond immediately without blocking waiting?
In the first column, we discussed why the program crashes under high concurrency conditions. The main reason is that in the case of high concurrency, there are a large number of user requests that require program calculation and processing. The current processing method is to allocate a thread to each user request. When the thread […]
[Performance Test] CPU problem location and analysis + thread blocking case analysis, one article directly on the high speed…
Table of Contents: Introduction Preface 1. Python programming from entry to proficiency 2. Practical implementation of interface automation projects 3. Web automation project actual combat 4. Practical implementation of App automation project 5. Resumes of first-tier manufacturers 6. Test and develop DevOps system 7. Commonly used automated testing tools 8. JMeter performance test 9. Summary […]
[Linux Programming] Five IO models of Linux: blocking IO, non-blocking IO, IO multiplexing, signal-driven IO and asynchronous IO
The Linux IO model refers to the way in which user processes and the kernel perform input and output operations in a Linux system. Input and output operations usually involve the transmission and copying of data. These operations consume system resources and time. Therefore, choosing an appropriate IO model is very important to improve the […]