Arm Architecture: Memory Model and Barriers [Author's Direct Lecture Part 3-3]

1. 30% discount coupon issued for breaking 300 participants

To commemorate reaching 300 students (Parts 1 & 2), we are issuing a 30% discount coupon. Thank you. Limited to the first 200 people.

• 30% discount coupon link: https://inf.run/wZG5U

2. Roadmap Guide 🎯

This lectureRoad Map'Arm for System Software Developers - Advanced Course'is included in the course.

If you want to learn Arm architecture (Armv8-A, Armv7-A) systematically, it would be good to utilize the roadmap (30% discount on all courses). For reference, the Arm architecture roadmap (all courses taught directly by the author) isBasic Course andAdvanced CourseIt consists of 2 components.

In the latest system software
The most important Arm architecture

Not only smartphones, but also AI SoC system semiconductors, electric vehicle Automotive (autonomous driving, infotainment), and Arm processors used in cloud servers and MacBooks are all Armv8-A based 64-bit Cortex-A processors (Cortex-A53, Cortex-A57, Cortex-A72, etc...). Currently, the Armv8-A architecture can be considered the area that requires the most foundational knowledge in the system software industry.

The first step to becoming an advanced system SW developer!
Understanding memory management methods🙋‍♂

However, to become an advanced system software developer, you need to have a good understanding of how memory is managed among the key features that make up the Arm architecture. The core aspects of memory management are the 'virtual memory system', 'cache operation principles', and 'memory model and barriers'.

Why should we learn about 'memory models and barriers'?

1⃣ First, understanding memory models and barriers well enables you to develop device drivers effectively. Most device drivers control peripheral devices using memory-mapped I/O methods, and in memory models (normal memory, device memory), device memory, which is the foundation of memory-mapped I/O methods, is covered in detail.

2⃣ Second, you need to have a good understanding of device memory (one of the memory models), which is the foundation of memory-mapped I/O, in order to program effectively to efficiently control the hardware that makes up system semiconductors. This is because most system semiconductors (fabless) design independent modules (IP) that make up system semiconductors through memory-mapped I/O methods.

3⃣ Third, understanding memory models and barriers well allows you to grasp the detailed operational principles inside Arm processors. Especially in multi-core systems, you frequently encounter situations where barriers are used to solve concurrency issues, and 'memory models and barriers' can serve as foundational knowledge.

4⃣ Fourth, to do well in system software development technical interviews, you need to have a good understanding of 'memory models and barriers'. One of the frequently asked questions in experienced developer interviews is about memory reordering and memory-mapped I/O related topics.

12 years of system engineer expertise packed into this author's direct instruction!

'Structure and Principles of Arm Architecture for System Software Development' book (Chapter 17) covers 'Memory Models and Barriers' in detail. I hope you will grow further as a system software developer through the author's direct lectures.

You'll learn this kind of content

This introduces the types of memory models defined in the Arm architecture and normal memory.

Introduces the types of memory models (normal memory and device memory) while analyzing Arm specification documents in detail.

This provides a detailed explanation of device memory, which is a memory-mapped I/O interface, and reviews the memory-mapped I/O of the BCM2711 (used in Raspberry Pi).

Analyze memory-mapped I/O interfaces through debugging (Crash-Utility).

Introduces barriers and provides detailed explanations of barrier examples.

Explains the scope of barriers and data consistency in multi-core systems.

This explains in detail how barriers are utilized in actual Linux kernels and XEN hypervisors.

Based on book writing/teaching experience
Deeper and more detailed than anyone else!

In the domestic system software field, I am the unprecedented author who wrote books on 'Arm Architecture (Armv8-A, Armv7-A)' and 'Linux Kernel'. I am also a current industry developer who best understands the latest system software trends (electric vehicles, system semiconductors - system software), and an educator who is most actively engaged in knowledge dissemination activities in the system software field.

• Author of 'Structure and Principles of Arm Architecture for System Software Development' (2024 Korea Academy Outstanding Book Award)

• 'Learning Linux Kernel Structure and Principles Through Debugging' (2021 Korea Academy Outstanding Book Award) Author

• 'Programmers Dev Course: Linux System and Kernel Expert' Main Instructor

• June 2022, Korea Computer Congress (KCC2022) - Tutorial Presentation [Conquering the Linux Kernel Using ftrace]

• LG Electronics 'Linux Kernel' and 'Armv8 Architecture' In-house Instructor (including domestic and overseas developers) - (2020~2024)

I can confidently say that I am an educator who can explain the key features that make up the Arm architecture (Armv8-A, Armv7-A) better than anyone else in Korea.

Vivid reviews left by learners

Pre-enrollment Reference Information