How to ensure cache data consistency in the shared memory？

[daiyinger]

iceoryx uses the shared memory area with cache, how to ensure that different processes of multi-core processors access the shared memory data consistency?

[elBoberido]

This is done with the atomics in out lock-free algorithms which takes care of syncronization.

Some material to dig deeper

• https://www.freecodecamp.org/news/atomics-and-concurrency-in-cpp/
• https://m.youtube.com/watch?v=A8eCGOqgvH4
• this is for Rust but can be applied simmilarly to C++ https://marabos.nl/atomics/

[elBoberido]

@daiyinger was my answer helpful or do you need more clarification?

[daiyinger]

Thank you for your explanation. I have grasped the general principle. Originally, when I asked this question, I was wondering if cache consistency could be guaranteed among memory blocks in different cores. Later, I learned that multi-core CPUs have cache synchronization protocols to ensure this.