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ArchAdept Training Archive

Hi! Welcome to ArchAdept 👋

ArchAdept is now in maintenance mode, meaning we are no longer producing new training courses and our private Community Forums and Discord server are now closed.

That said, our Barriers 101 training course is still available for purchase and both new and existing customers will retain lifetime access to the course.

Thanks!

Barriers 101: Bundle

  • 33 Lessons

The complete Barriers 101 training course, a comprehensive deep dive on barriers in the Arm® Architecture. Explore the rules underpinning Arm's weakly-ordered memory model. Learn how to use barriers to manually enforce ordering. Step through real examples of how barriers work in hardware. Visualize accesses flowing through the interconnect. Gain confidence tackling unfamiliar barrier scenarios from first principles.

Barriers 101: Part 1

  • 11 Lessons

Standalone Part 1 of our comprehensive training course on Barriers in the Arm® Architecture. Discover why Arm defines a weakly-ordered memory model. Explore the rules dictating whether two memory accesses are permitted to be reordered. Learn how to use barriers in software to manually enforce ordering. Experiment with descoping barriers to minimise any potential impacts on system performance.

Barriers 101: Part 2

  • 10 Lessons

Standalone Part 2 of our comprehensive training course on Barriers in the Arm® Architecture. Discover how AMBA®-based cache coherent interconnects work. Explore how Shareability domains are defined in hardware. Learn how barriers really work, both when they're being broadcast onto the interconnect for it to handle on behalf of the CPU and when they're being handled internally to the CPU based on completion responses.

Barriers 101: Part 3

  • 6 Lessons

Standalone Part 3 of our comprehensive training course on Barriers in the Arm® Architecture. Discover why Data Memory Barriers are not always sufficient to guarantee ordering. Explore how to use other barriers to enforce ordering in those situations. Learn how Arm formally defines ordering relationships in its weakly-ordered memory model. Learn how to test for missing barriers under simulation.

Barriers 101: Part 4

  • 6 Lessons

Standalone Part 4 of our comprehensive training course on Barriers in the Arm® Architecture. Discover how speculative side-channel attacks like Spectre and Meltdown work. Explore how to use barriers to control speculation. Learn how to correctly use barriers to perform break-before-make sequences when modifying the page tables so as to prevent all kinds of nasty, horribe-to-debug issues.

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Testimonials

We're proud to maintain a 100% 5⭐️ rating; see what our happy learners are saying:

"This is a great introductory course on Arm memory barriers. The instructor explains complex topics like weak memory ordering, instruction reordering, and barrier usage in a clear and structured manner. I especially appreciated the practical insights and real-world examples. It's a must-watch for anyone working close to hardware or writing low-level Arm code. Looking forward to the next parts in the series!"

Sidraya J.

"Part 2 covers AMBA interconnects and the two different ways how barriers can be dealt with in hardware. Note that this is not a training on AMBA architecture, but Ash instead makes a great didactical effort to only introduce as much of AMBA as needed to understand the interaction with barriers. In my opinion this is one of the strengths of Ash‘s way of teaching, which makes it easy to follow, even if there is no prior knowledge present."

Matthias R.

"The material is presented with precise and thoughtful wording, and the examples are clear and easy to follow. The instructor does a great job of breaking down complex concepts into a logical, easy-to-understand flow."

Dawid B.

Thank you for your courses on barriers. I’m really glad I got them - now I can study thinking, “Wow, barriers are cool - that’s why they built it this way,” instead of, “What else should I read to finally understand how it works?”

Ivan S.

Why ArchAdept?

Beginner to expert

Our courses are suitable for all levels of experience, whether you're already a seasoned veteran or you're working with the Arm Architecture for the very first time.

How it really works

We aim to go both broader and deeper than any other training platform; we show you how things really work, and more importantly, why.

Learning is doing

Reinforce your learning with regular multiple-choice quizzes including full video walkthroughs of each question and answer, barrier workshop, and full course-revision session.

Your own pace

We appreciate it can be difficult to balance training with your regular work; our courses come with lifetime access so you can learn at your own pace.

Buy with confidence

Try before you buy, and in the unlikely event that you're not entirely satisfied with your purchase then we'll refund you within the first 30 days.