The book, especially chapter 7 seems to say several things completely opposite to what Herb Sutter did in his famous talk a number of years ago.
In the book:
> This means that on ARM64, sequentially consistent operations are exactly as cheap as acquire and release operations. Or, rather, that ARM64 Acquire, Release, and AcqRel operations are as expensive as SeqCst. Unlike x86-64, however, Relaxed operations are relatively cheap, as they don’t result in stronger ordering guarantees than necessary.
However in Herb Sutter's talk (specifically the second half here: https://www.youtube.com/watch?v=KeLBd2EJLOU ) he says that ARMv8 Acquire/Release/AcqRel operations are cheaper than SeqCst. This book seems to claim that x64 is somehow superior to ARMv8, which from my understanding is completely wrong.
In the book:
> This means that on ARM64, sequentially consistent operations are exactly as cheap as acquire and release operations. Or, rather, that ARM64 Acquire, Release, and AcqRel operations are as expensive as SeqCst. Unlike x86-64, however, Relaxed operations are relatively cheap, as they don’t result in stronger ordering guarantees than necessary.
However in Herb Sutter's talk (specifically the second half here: https://www.youtube.com/watch?v=KeLBd2EJLOU ) he says that ARMv8 Acquire/Release/AcqRel operations are cheaper than SeqCst. This book seems to claim that x64 is somehow superior to ARMv8, which from my understanding is completely wrong.