Arm's Weakly-Ordered Memory Model and Barrier Requirements - Ash Wilding, Amazon

Arm's Weakly-Ordered Memory Model and Barrier Requirements - Ash Wilding, Amazon

Arm's weakly-ordered memory model and the need for correct, minimally intrusive barriers while retaining performance are some of the biggest stumbling blocks for people building Arm-based HW/SW systems. Barriers in particular are seen as being "scary", especially if one's experiences are mostly working with strongly-ordered architectures like x86, leading people to use stricter, more intrusive barriers than necessary just to be safe. In this talk, Ash will introduce these concepts then walk you through several real-world examples to help demystify them.

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