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Path: ...!3.eu.feeder.erje.net!feeder.erje.net!eternal-september.org!feeder3.eternal-september.org!news.eternal-september.org!.POSTED!not-for-mail From: Lawrence D'Oliveiro <ldo@nz.invalid> Newsgroups: comp.arch Subject: Re: Is Intel exceptionally unsuccessful as an architecture designer? Date: Fri, 20 Sep 2024 04:05:35 -0000 (UTC) Organization: A noiseless patient Spider Lines: 17 Message-ID: <vcisaf$ulcv$1@dont-email.me> References: <memo.20240913205156.19028s@jgd.cix.co.uk> <vcd3ds$3o6ae$2@dont-email.me> <2935676af968e40e7cad204d40cafdcf@www.novabbs.org> <vcd7pr$3op6a$3@dont-email.me> <7wCGO.45461$xO0f.1783@fx48.iad> <20240918190414.00005806@yahoo.com> <8e1aed9ce25c70cc555731140ae14eb1@www.novabbs.org> <vcfln9$836k$1@dont-email.me> <vcgi7p$fmaa$2@dont-email.me> <f6093802cde5821a88ff715b8139fc04@www.novabbs.org> <vcicir$ov66$1@dont-email.me> <ad85483a2a41b704c1cbb6e796aaf9f4@www.novabbs.org> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Injection-Date: Fri, 20 Sep 2024 06:05:35 +0200 (CEST) Injection-Info: dont-email.me; posting-host="e114a577b81d0eff5431452080854aaa"; logging-data="1004959"; mail-complaints-to="abuse@eternal-september.org"; posting-account="U2FsdGVkX18chR4u1Id4EC5neuiPgKW6" User-Agent: Pan/0.160 (Toresk; ) Cancel-Lock: sha1:p0x9OryVXlMAAXSEZ1uW722L7Hw= Bytes: 1970 On Fri, 20 Sep 2024 00:58:44 +0000, MitchAlsup1 wrote: > Hint:: They can context switch every instruction. How does that help? > So if an instruction > does not complete in its cycle, they switch to a different set of > threads; That will need to do its own memory accesses. But the memory interface is still busy trying to complete the access for the previous thread. > Also note: a single instruction causes 32-128 threads to make 1 step of > forward progress. How many memory accesses does it take to complete that one step?