Hello!
 
 
The article provides an overview of the virtual memory system architecture ARMv7.
 
 
Headline spoiler [/b]
It does not consider the subtleties of caching, DMA, LPAE and the like. For a more detailed description, refer to the literature at the end of the article.
 
 
 
[h2] The introduction of 3r-3262.
 
The virtual memory system performs several tasks. First, it allows you to place user processes in separate, isolated from each other, memory spaces. This allows you to increase the reliability of the system, the errors of one process do not affect the operation of other processes. Secondly...

3r3958.  
In Previous post we scaled the MongoDB replica set and met StatefulSet. We will now orchestrate Elasticsearch high-availability cluster (with other master nodes, data nodes, and client nodes) and use ES-HQ and Kibana. 3r33961. 3r3958.  
You will need:
3r3958.  
 
Basic idea of ​​Elasticsearch, its node types and their roles. 3r33780.  
A working Kubernetes cluster with at least three nodes (at least four cores, 4 GB). 3r33780.  
Ability to work with Kibana. here 3r33766. . 3r33961. 3r3958.  
3r33939...

 
3r3-31. In previous part 3r3689. we looked at the evolution of interrupt delivery from devices in x86 systems (PIC → APIC → MSI), the general theory, and all the necessary terms. 3r33770.  
3r33770.  
In this practical part, we will look at how to roll back to using outdated interrupt delivery methods in Linux, namely, consider the kernel boot options:
 
3r33770.  
3r33737.  
3r3756. pci = nomsi
 
3r3756. noapic
 
3r3756. nolapic
 
3r3769. 3r33770.  
We will also look at the order in which the OS looks at the interrupt routing tables (ACPI /MPtable /$ PIR) and what effect it will have on adding ...

Hello again!
 3r3334.
 3r3334. We present you an open lesson of the course "DevOps practices and tools" on the topic "Infrastructure as a code." Igor Kurochkin , a course instructor, for example, this practice tells how you can improve team interaction, speed up the software delivery process and reduce the number of errors, and show the main practices and tools for developing infrastructure code.
 3r3334.
 3r3334.
3r318.

I have a folder with old pictures that I collected in zero. I transfer from computer to computer along with all my files with each upgrade, occasionally I go to notify me. But each time I was a little embarrassed that the standard Windows 7 viewer did not show GIF animation, although my memory told me that during the time of XP the animation was shown without problems. With the next attack of nostalgia, I decided to launch the viewer from XP on Windows 7. After overcoming a number of obstacles, I am now sure that GIF-animation was really supported there! And most importantly - now I can watch my ...

 3r33895. 3r3-31. 3r33879. 3r33882.  3r33895. So. There was a problem to dynamically control a long line of R28 LEDs WS2812B. Classical approaches to this case are known. You can take the banal Arduino, but there the output goes programmatically, so while the data is being output - everything else is idle, otherwise the time diagrams will fail. You can take STM32 and output data either through DMA to PWM or through DMA to SPI. Techniques are known. I even, at one time, personally through SPI already ruled a line of sixteen diodes. But the overhead is great. One bit of data in the LEDs takes 8 bits in memory ...

3r33333.  3r301501. 3r33232. What is UHCI? 3r33300. 3r33333.  3r301501. I think that once again not to be sprayed on what and why, just leave a link to my previous article on EHCI. Tyr here 3r33333.  3r301501. UHCI - Universal Host Controller Interface, works as a PCI device, but, unlike EHCI, it uses ports instead of MMIO (Memory-Mapped-IO). 3r33333.  3r301501. 3r33333.  3r301501.
 3r301501.
USB Driver (USBD) -
USB driver itself.  3r301501.
HC (Host Controller) - the host controller, or simply our UHCI 3r-3285.  3r301501.
Host Controller Driver (HCD) is a driver that binds hardware and USBD 3r-3285.  3r301501.
The USB Device is the
USB device itself.  3r301501.
3r33333.  3r301501. 3r33333.  3r301501. 3r33232. Types of data transmission
3r33333.  3r301501. Isochronous — an isosynchronous transfer that has a given data transfer rate. It can be used, for example, for USB microphones, etc. 3r33333.  3r301501. Interrupt - Small, spontaneous data transfers from the device. The interrupt transfer type supports devices that ...

 3r3778. 3r3-31. 3r33737.  3r3778. 3r33766. In the operating system 3r3338. Embox
(of which I am a developer) OpenGL support appeared some time ago, but there was no sensible performance check, only drawing scenes with several graphic primitives. 3r33767. 3r33737.  3r3778. 3r33766. I have never been particularly interested in game devs, although, of course, I like the games, and decided that this is a good way to have fun, but at the same time check OpenGL and see how the games interact with the OS. 3r33767. 3r33737.  3r3778. 3r33766. In this article I will talk about how to build and run Quake3 on Embox. 3r33767...

 3r31250. 3r3-31. From bootloader to kernel 3r31180.  3r31250. 3r31180.  3r31250. If you read the previous Article 3r31236. , you know about my new hobby for low-level programming. I have written several articles about programming in assembler for 3r31172. x86_64 Linux and at the same time began to dive into the source code of the Linux kernel. 3r31180.  3r31250. 3r31180.  3r31250. I am very interested in understanding how low-level things work: how programs run on my computer, how they are located in memory, how the kernel manages processes and memory, how the network stack works at ...

3r3757. System.IO.Pipelines
Is a new library that simplifies code organization in .NET. It is difficult to ensure high performance and accuracy if you have to deal with complex code. The task of System.IO.Pipelines is to simplify the code. More under the cut! 3r33767.  3r3774. 3r33767.  3r3774. The fastest webservers in the industry
. It was originally conceived as part of the Kestrel implementation, but evolved into a reusable API, available in version 2.1 as the first class BCL API (System.IO.Pipelines). 3r33767.  3r3774. 3r33767.  3r3774. 3r3753. What problems does she solve? 3r3754. 3r33767.  3r3774...