Vhiki rino, Linus Torvalds (iye mugadziri weLinux kernel) akagovana maonero ake pa iwo kuraira kwakamisikidzwa Intel AVX-512 inowanikwa mune mamwe ema processor.
Mumashoko akasiya, Torvalds Ndinotaura izvozvo «kutarisira AVX-512 kufa kufa kunorwadza".
Kuna baba veLinux, AVX-512 kuraira kwakaisirwa kunobatsira chete pamusika weHPC uye ine zvipingaidzo chaizvo. Sekureva kwake, Intel inofanira kurega kutambisa zviwanikwa mune mitsva yekuraira kutarisa pazvinhu zvinonyanya kukosha.
Intel chipmaker weIntel munguva pfupi yapfuura yakazivisa kuti ayo ari kuuya Alder Lake mapurosesa haazofambidzana neAVX-512 yekurayira yakatarwa.
Iyo AVX-512 ndeye seti ye512-bit yekuwedzera kune SIMD mirairo (Yakawedzera Vector Extensions) 256-bit ye x86 kuraira kwakavakirwa dhizaini iyo Intel yakaronga makore manomwe apfuura. Tsigiro yeAVX-512 yakatanga paIntel Xeon Phi x200 processor (Knights Landing) muna2016.
Gare gare AVX-512 yakapaza nepakati kune zvimwe zvinopihwa kubva kune anogadzira chipmaker, kunyanya Skylake-SP, Skylake-X, Cannon Lake, uye Cascade Lake. Parizvino, kambani yeIntel Cooper Lake uye Ice Lake processor vanotsigira mamwe maseti eAVX-512. Intel ine runyerekupe rwekuti yakasimbisa kuti Tiger Lake ichashanda iyo AVX-512 isati yazivisa munguva pfupi yapfuura kuti iyo inotevera Alder Lakes haizoishande.
Kune Torvalds, izvi zvese hazvibatsiri uye anotarisira kuti Intel ichadzokera kumashure uye kutanga maitiro ayo.
"Ndinovimba kuti iyo AVX-512 inofa rufu runorwadza, uye kuti Intel inotanga kugadzirisa matambudziko chaiwo pachinzvimbo chekuyedza kugadzira rairo dzemashiripiti uye nekugadzira mabhenji avanogona kuvimba nawo," akadaro?
Uyewo inoda kuti chipmaker itarise zvakanyanya pane yakajairwa kodhi, isiri HPC (yakakwira kuita komputa) kana chero imwe nyaya isingakoshi. Kubva pane zvinotaurwa naTorvalds, izvi zvese zvinoyeuchidza mazuva ayo Intel yaitonga pamusika wechip, asi kuita kwayo kweFP kwaive zero.
"Ndakambozvitaura uye ndichazvitaura zvakare: panguva yekupedzisira yeX86, Intel paakaseka kubhangi ndokuuraya makwikwi avo ese, zvachose munhu wese akaita zvirinani pane Intel pakasvika FP Mhosva.
Intel's FP performance yaive zero (kutaura zvine mutsindo), uye izvo hazvina basa nekuti, muchokwadi, hapana munhu ane hanya kunze kwemabhenji. Izvo zvinoenda kune iyo AVX-512 nhasi uye mune ramangwana. Ehe, isu tinogona kuwana zvinhu zvakakosha. Kwete, zvinhu izvi hazvitenge michina zvachose, ”akadaro.
Linus Torvalds inofunga iyo AVX-512 ine chaiyo yekudzikira uye kuti ini ndingafarire kuti bhajeti iyo kambani yakapa kune vanoshandura ishandiswe kune zvimwe zvinhu zvakanyanya kukosha, kunyangwe ichiri FP math (pane iyo GPU, panzvimbo yeAVX-512).
Zvikasadaro, iwe unoda kuti isu tikungokupa iwe mamwe ma cores (ane yakanaka imwechete-tambo mashandiro, asi hapana marara senge AVX-512) sezvakaita AMD. Saka nekudaro, yeuka kuti iwe uchangobva kutama kubva kuIntel processor kuenda kune AMD Threadripper processor.
Torvalds akati neiyi processor yake bvunzo dze "allmodconfig" dzinokurumidza katatu nekukurumidza kupfuura pakutanga. Zvichiri kufananidzwa neAVX-512, yakati inoda kuti miganho yemagetsi isvike neyakajairwa kodhi kodhi, uye kwete neAVX-512 simba hutachiona hunodzvinyirira huwandu hwakawanda (nekuti vanhu vakapedzisira vaishandisa memcpy!) .
Pakupedzisira, Linus Torvalds akati anofunga kuti AVX-512 chimwe chinhu chisina kunaka.
Hongu, hongu, ini ndakarerekera. Ini zvachose handifarire mabhenji eFP, uye ndinoona kuti vamwe vanhu vane hanya navo zvakanyanya. Ini ndinongofunga iyo AVX-512 ndizvo chaizvo zvisiri izvo zvekuita. Ndicho chimwe chezvandinovaraidza. Uyu muenzaniso wakanaka weizvo Intel zvaakatadza, muchidimbu nekuwedzera kukamukana kwemusika, "akadaro.
Kana iwe uchida kuziva zvakawanda nezvazvo, unogona kubvunza chinotevera chinongedzo.