John Regehr • 11/6/2021

A Close Look at a Spinlock

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The article provides a deep technical dive into the low-level implementation of a spinlock on ARM architecture, examining the ldrex (load exclusive) and strex (store exclusive) instructions. It discusses how the unlock operation works, the atomicity of writes, and speculates on internal CPU synchronization mechanisms compared to x64 architecture.

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#concurrency #Arm #Atomic Operations
A Close Look at a Spinlock

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