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Path: ...!eternal-september.org!feeder2.eternal-september.org!news.eternal-september.org!.POSTED!not-for-mail From: "Chris M. Thomasson" <chris.m.thomasson.1@gmail.com> Newsgroups: comp.arch Subject: Re: Memory ordering Date: Fri, 15 Nov 2024 12:48:46 -0800 Organization: A noiseless patient Spider Lines: 19 Message-ID: <vh8c3f$3j6ql$2@dont-email.me> References: <vfono1$14l9r$1@dont-email.me> <vgm4vj$3d2as$1@dont-email.me> <vgm5cb$3d2as$3@dont-email.me> <YfxXO.384093$EEm7.56154@fx16.iad> <vh4530$2mar5$1@dont-email.me> <-rKdnTO4LdoWXKj6nZ2dnZfqnPWdnZ2d@supernews.com> <vh5t5b$312cl$2@dont-email.me> <5yqdnU9eL_Y_GKv6nZ2dnZfqn_GdnZ2d@supernews.com> <2024Nov15.082512@mips.complang.tuwien.ac.at> <vh7rlr$3fu9i$1@dont-email.me> <2024Nov15.182737@mips.complang.tuwien.ac.at> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Injection-Date: Fri, 15 Nov 2024 21:48:52 +0100 (CET) Injection-Info: dont-email.me; posting-host="f78e91c2ef29d1e51cbaba76277412a0"; logging-data="3775317"; mail-complaints-to="abuse@eternal-september.org"; posting-account="U2FsdGVkX18VJxAXbHD65eFfNPt1q0gATL4tWUdcoOY=" User-Agent: Mozilla Thunderbird Cancel-Lock: sha1:XzQsYjiO6MJ0gRQe7yyGIHHf46M= Content-Language: en-US In-Reply-To: <2024Nov15.182737@mips.complang.tuwien.ac.at> Bytes: 2121 On 11/15/2024 9:27 AM, Anton Ertl wrote: > jseigh <jseigh_es00@xemaps.com> writes: >> Anybody doing that sort of programming, i.e. lock-free or distributed >> algorithms, who can't handle weakly consistent memory models, shouldn't >> be doing that sort of programming in the first place. > > Do you have any argument that supports this claim. Well, if one can't handle the memory barriers, say wrt std::memory_order_* ala C++ . well. that is a problem wrt creating these "exotic" types of algorithms. Imvvho, that is. >> Strongly consistent memory won't help incompetence. > > Strong words to hide lack of arguments? For instance, a 100% sequential memory order won't help you with, say, solving ABA.