ARM ta ƙaddamar da sabon ƙirar ƙirar sa, Cortex-A77. Kamar Cortex-A76 na shekarar da ta gabata, wannan cibiya an tsara shi ne don ayyuka masu tsayi a cikin wayoyin hannu da na'urori iri-iri. A ciki, mai haɓakawa yana nufin ƙara yawan umarnin da ake aiwatar da kowane agogo (IPC). Gudun agogo da amfani da wutar lantarki sun kasance kusan a matakin Cortex-A76.
A halin yanzu, ARM yana da niyyar haɓaka aikin kwatancen cikin sauri. Dangane da tsare-tsaren sa, farawa da 73 Cortex-A2016 har zuwa ƙirar 2020 Hercules, kamfanin yana da niyyar ƙara ƙarfin CPU da sau 2,5. Tuni canje-canje daga 16 nm zuwa 10 nm sannan zuwa 7 nm ya sa ya yiwu a ƙara yawan agogo, kuma a hade tare da Cortex-A75 da kuma Cortex-A76 gine-gine, bisa ga kiyasin ARM, karuwar 1,8-ninka a cikin aikin. an cim ma har yau. Yanzu Cortex-A77 core zai ba da izini, saboda haɓakar IPC, don haɓaka aikin da wani 20% a mitar agogo ɗaya. Wato, haɓaka ninki 2,5 a cikin 2020 ya zama ainihin gaske.
Duk da karuwar 20% na IPC, ARM ta kiyasta cewa amfani da wutar lantarki na A77 bai karu ba. Cinikin ciniki a cikin wannan yanayin shine yankin guntu A77 yana da kusan 17% girma fiye da A76 a daidai daidaitattun sarrafawa. A sakamakon haka, farashin jigon mutum ɗaya zai ƙaru kaɗan. Idan muka kwatanta nasarorin ARM tare da shugabannin masana'antu, yana da kyau a faɗi cewa AMD a cikin Zen 2 ya sami karuwar IPC na 15% idan aka kwatanta da Zen +, yayin da ƙimar IPC na cores Intel ya kasance kusan iri ɗaya tsawon shekaru da yawa.
Tagar aiwatarwa don canza jerin umarni (girman taga ba-da-a-da-a-da-ba) an haɓaka da 25%, zuwa raka'a 160, wanda ke ba kernel damar haɓaka daidaiton lissafin. Ko da Cortex-A76 yana da babban Buffer Target Reshe, kuma Cortex-A77 ya ƙaru da wani 33%, zuwa 8 KB, wanda ke ba da damar sashin tsinkayar reshe don jimre da haɓakar adadin umarni daidai.
Wani sabon abu mai ban sha'awa shine sabon ma'ajin 1,5 KB wanda ke adana ayyukan macro (MOPs) da aka dawo daga tsarin yanke hukunci. Tsarin gine-ginen na'ura na ARM yana yanke umarni daga aikace-aikacen mai amfani zuwa ƙananan macro-ayyukan aiki, sa'an nan kuma ya karya su cikin ƙananan ayyuka waɗanda aka wuce zuwa ainihin aiwatarwa. Ana amfani da ma'ajin MOP don rage tasirin rassan da aka rasa da gogewa saboda yanzu ana adana ayyukan macro a cikin wani shinge na daban kuma baya buƙatar sake yin la'akari - don haka ƙara yawan kayan aiki gabaɗaya. A wasu nau'ikan ayyuka, sabon toshe ƙari ne mai fa'ida sosai ga ma'auni na koyarwa.
An ƙara toshe ALU na huɗu da toshe reshe na biyu zuwa ainihin aiwatarwa. ALU na huɗu yana ƙara yawan kayan sarrafawa gabaɗaya da sau 1,5 ta hanyar ba da damar umarnin sake zagayowar guda ɗaya (kamar ADD da SUB) da ayyukan intiger na turawa kamar ninkawa. Sauran biyun ALUs ba za su iya ɗaukar ainihin umarnin sake zagayowar guda ɗaya kawai ba, yayin da shingen ƙarshe yana ɗorawa tare da ƙarin hadaddun ayyukan lissafi kamar rarrabawa, ninka-a tarawa, da sauransu. Rushe reshe na biyu a cikin ainihin aiwatarwa yana ninka yawan adadin reshe na lokaci guda yana canzawa. core na iya ɗaukar aiki, wanda ke da amfani a lokuttan da biyu daga cikin umarni shida da aka aika suna da alaƙa da canjin reshe. Gwajin ciki a ARM ya nuna fa'idodin aiki daga amfani da wannan toshe reshe na biyu.
Sauran canje-canjen kwaya sun haɗa da ƙari na bututun boye-boye na AES na biyu, haɓaka bandwidth na ƙwaƙwalwar ajiya, ingantacciyar injin prefetch na zamani na gaba don haɓaka ƙarfin ƙarfin aiki yayin haɓaka kayan aikin DRAM na tsarin, haɓaka cache, da ƙari.
Ana ganin mafi girman ribar a cikin Cortex-A77 a cikin integer da ayyukan ma'ana. Wannan yana samun goyan bayan ma'auni na SPEC na ciki na ARM, waɗanda ke nuna nasarorin aiki na 20% da 35% a cikin ƙididdiga da ayyuka masu iyo, bi da bi. Inganta bandwidth ƙwaƙwalwar ajiya wani wuri ne a cikin kewayon 15-20%. Gabaɗaya, haɓakawa da canje-canje zuwa matsakaicin A77 ya karu da kashi 20 cikin ɗari a cikin aiki idan aka kwatanta da tsarar da ta gabata. Tare da sababbin ƙa'idodin fasaha kamar 7nm ULV, za mu iya samun ƙarin fa'idodi a cikin kwakwalwan kwamfuta na ƙarshe.
ARM ya haɓaka Cortex-A77 don yin aiki a cikin babban 4 + 4. LITTLE haɗuwa (4 iko mai ƙarfi da 4 masu sauƙi masu amfani da makamashi). Amma, da aka ba da ƙarin yanki na sabon gine-gine, da yawa masana'antun, don ajiye kudi, za su iya gabatar da 1 + 3 + 4 ko 2 + 2 + 4 haduwa, wanda aka riga rayayye aikata, inda kawai daya ko biyu tsakiya za su. zama cikakke, ba a yanke A77.
source: 3dnews.ru