Boost Your Programming Power With Linux Multithreading（linux多线程设计）

Programming with multiple threads of execution, or multithreading, is essential in today’s computing world. The ability to take advantage of modern CPUs’ parallel processing capabilities is particularly important in Linux programming, where resources tend to be limited. In this article, I’ll discuss the basics of Linux multithreading and show you how to use it to maximize your programming power.

First, let’s define some key terms. Threading is the process of creating multiple processes that can run independently from one another. Each process generally has its own set of processor registers, stacks, and execution context. A thread refers to a single process within a threading system. There can be multiple threads within a process, and each thread has its own instructions.

Threading can be used to improve performance in systems where there are multiple tasks that need to be completed simultaneously. For example, if you’re writing a program that performs an intensive computation, such as an image processing algorithm, you could use multithreading to spread out the work. Each thread can process a portion of the algorithm, which would reduce the overall time it takes to complete the computation.

Linux provides a powerful set of multithreading tools that you can use to take advantage of threading technology. The pthreads library is the most common way to create threads in Linux. Pthreads provides an API that enables you to create, control and manage multiple threads in a single program. It also offers synchronization primitives, such as mutexes and semaphores, that can be used to prevent race conditions between threads.

Once you have the threading tools you need, you can start programming. Here’s a simple example of how to use pthreads in a program. This program creates two threads, each of which prints the number 1-10. In the main function, the program creates the threads and then joins them to make sure that all the threads have finished before the program exits.

#include 
#include 
// Thread function 
void *threadFunc(void *data) 
{ 
    int i; 
  
    // Printing the numbers 1 to 10 
    for (i = 1; i 
        printf("%d\n", i); 
    } 
  
    return NULL; 
} 
  
int main() 
{ 
    // Creating two threads 
    pthread_t thr1, thr2; 
  
    // Running threads by calling threadFunc 
    pthread_create(&thr1, NULL, threadFunc, NULL); 
    pthread_create(&thr2, NULL, threadFunc, NULL); 
  
    // Joining both threads 
    pthread_join(thr1, NULL); 
    pthread_join(thr2, NULL); 
  
    return 0; 
}

In addition to its multithreading tools, the Linux operating system provides excellent support for multithreading. The low latency kernel, for example, ensures that threads are scheduled quickly and efficiently. The kernel also avoids the so-called context switch penalty, which allows threads to transition quickly from one state to another.

Linux multithreading can be a powerful tool for maximizing program performance. With the right tools and knowledge, you can harness the power of multiple threads to execute tasks faster and more efficiently. With the right instruction, you can turn Linux into an unstoppable programming powerhouse!