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Myths Programmers Believe about CPU Caches (2018)

(software.rajivprab.com)
149 points whack | 1 comments | 31 Oct 25 00:46 UTC | HN request time: 0.224s | source
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breppp ◴[01 Nov 25 10:22 UTC] No.45780585[source]▶
Very interesting, I am hardly an expert, but this gives the impression that if only without that meddling software we will all live in a synchronous world.

This ignores store buffers and consequently memory fencing which is the basis for the nightmarish std::memory_order, the worst api documentation you will ever meet

replies(1): >>45783071 #
1. jeffbee ◴[01 Nov 25 16:38 UTC] No.45783071[source]▶
If the committee had any good taste at all they would have thrown DEC AXP overboard before C++11, which would have cut the majority of the words out of the specification for std::memory_order. It was only the obsolete and quite impossible to program Alpha CPU that requires the ultimate level of complexity.