Concurrent programming multi process programming (python version)

catalogue 1 overview of Python multiprocess programming 2 needs and programmes Background: Requirements: Solution: Problems and solutions to be solved: 3 complete code 1 overview of Python multiprocess programming Multithreading in Python cannot take advantage of multi-core. If you want to make full use of the resources of multi-core ...

Posted by guzman-el-bueno on Thu, 28 Oct 2021 03:53:37 -0700

Use supervisor to guard the consumer process of RabbitMQ

When using RabbitMQ for asynchronous message processing, it is always found that after one or more consumer processes are started, they are automatically disconnected after a period of time, such as a few minutes or 10 minutes, resulting in a large number of messages in the queue and can not be processed. In order to ensure the continuous high ...

Posted by mikeblaszczec on Mon, 18 Oct 2021 17:18:27 -0700

Linux C/C + + shared memory with message queue and semaphore encapsulation

Encapsulation of Linux 'C/C + + shared memory with message queue + semaphore 1, Train of thought The server demo I do is divided into two servers: the front server and the rear server. The front server is used to receive information, contract and unpack, while the rear server is used to process the package business. The front and rear process ...

Posted by no_one on Fri, 08 Oct 2021 22:28:22 -0700

Understanding Zombie Processes under linux-Orphan Processes-Test Samples and Sources for Daemons

Test Code #define _GNU_SOURCE #include<sched.h> #include<stdio.h> #include<stdlib.h> #include<unistd.h> #include<stdint.h> #include<sys/wait.h> #include<sys/types.h> typedef void (*spawn_proc_pt)(void*data); static void work_process_cycle(void*data);//Function of work static void start_processes ...

Posted by bogins on Thu, 30 Sep 2021 10:16:29 -0700

Interprocess communication (IPC) mode

Interprocess communication (IPC) mode Inter process communication (IPC) mainly includes the following: 1,Nameless pipe( PIPE)And famous pipes( FIFO). 2,Signal( signal). 3,system V-IPC Shared memory. 4,system V-IPC Message queue. 5,system V-IPC Semaphore. 6,Socket. 1. Pipeline 1.1 unknown pipeline 1.2 characteristics of unkn ...

Posted by trent2800 on Mon, 06 Sep 2021 20:12:34 -0700

Multiprocessing - multitasking and multiprocessing notes

In the previous section, we talked about the concept of multiprocessing. Just look at multithreading in the previous section. Multi process mainly uses multiprocessing library. The main code flow is as follows 1. Import library: import multiprocessing 2. Create process: t1 = multiprocessing.Process(target=test1) t1.start() import multiprocessi ...

Posted by ManicMax on Sat, 04 Sep 2021 14:40:11 -0700