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In this article I will tell you how the OS manages the I/O devices. We know that I/O devices are slower than CPU or RAM, by this reason the OS developers came up with ideas to add special schedulers, caches and buffers.

Before reading this article I strongly recommend to…

In this article I will tell you about multithread support in modern operating systems. Scientists discussed the problem of slow singlethread systems back in the 70s, but when implementing a multithread system, the developers faced a number of problems.

I strongly recommend to read my article OS Design: Threads and…

In all operating systems, including Linux, the term “command” means either a command-line utility or a specific feature built into the system’s command shell. You enter a command in the terminal emulator and get the result of its execution.

Now let’s look at some basic utilities that everyone needs to…

If you have hardware 3D acceleration, you use a graphics processor instead of a CPU to create 3D images. CPU is forced to render everything on its own without hardware 3D acceleration, using Mesa library.

What is Mesa

Mesa is an open source implementation of the OpenGL, Vulkan, OpenCL, and other graphics APIs…

In this article I will tell you about the most known bug in Linux distributions.

Most likely, during your time using Linux, you have at least once faced the problem that when you run a large number of programs or heavy loads on the file system, the computer “freezes”, often…

Many android users wondered why updates arrive with a long delay on smartphones with the Android operating system. And if iPhone devices receive updates almost immediately after the release of the new iOS, then in the case of Samsung’s flagmans, Oneplus, the OS update comes at best in a month…

Bootloader is a low-level program which manages boot modes and then calls kernel to load the OS or recovery kernel to load recovery ramdisk.

You know that bootloader controls boot modes. In this article I will tell you about them. Here they are:

  1. Android OS boot
  2. Recovery menu
  3. Fasboot mode

In this article, I will tell you about partition tables for MTK and QCOM devices.
Unlike the OS on computers, smartphones don’t have dynamic partition table.

How to view partitions

To view the main partitions, you just need to perform one of two methods:

  1. Install Device Info HW and view partitions
  2. Download Termux and…

In this article, you will discover what virtual memory is and how processes and threads access your computer’s RAM.
Virtual memory is a virtual layer between threads and RAM, providing controlled interaction between threads and RAM.

Threads and virtual memory

In this article I said about threads that every thread has pointers to memory.

Programmers are people who write programs. Have you ever thought about where and in what form programs are presented in operating systems? In this article, we will learn what processes and threads are, how the OS manages them.

This article intersects with programming, so let’s also consider some example code…


throw new NoSuchElementException("Bio is not found");

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