Yhn first seen 7 d ago, last 7 d ago, peak #25
Deep Dive: When ldaxr Fails on AArch64 Processors
Original: When Ldaxr Doesn't Work: Exclusive Accesses and Cacheability on AArch64
A new technical blog post by Joel Siks examines why the AArch64 exclusive access instruction ldaxr can fail to work as expected, focusing on how cacheability of memory regions affects exclusive monitors on ARM processors. The article walks through the low-level memory ordering and cache behavior involved, and is drawing attention from systems and low-level programming enthusiasts debating the subtleties of ARM architecture.
Why now: Systems programmers find exotic ARM64 memory-ordering and cacheability failure cases technically fascinating and practically relevant.
Evidence
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