Chii cache ndangariro

Havasi vose kombiyuta varidzi vanoziva kuti Maive yakadaro, kunyange zvazvo ari kushingaira kushandiswa zvachose vagadziri zvose, zvose processors uye zvirongwa. Vamwe vanoshandisa vaingoita achangotanga kukudziridza pachake kombiyuta, dzimwe nguva zvichikurukurwa forum iri Global Network chokunyunyuta pamusoro kunonoka kuita zvavo zvemagetsi vabatsiri. Somuenzaniso, kana 5 masekonzi zvakaitika pakati kutanga chipepa mapurogiramu hofisi uye kwaita Mahwindo aro, zvino runoonekwa kuva zvikuru nguva. Kana rinoti vari 10-15 masekonzi zvinodiwa kuti vene yacho uchishandisa hurongwa kubva zvakaoma dhisiki kuti rinobva nendiro - kutambisa nguva. Zvinoshamisa: makore chete gumi nevaviri apfuura, kushanda Chirongwa aigona kutora kweminiti anenge hafu, uye zvaionekwa zvakasimba. Chimwe chinhu chiri pachena - wakawedzera kombiyuta waivako yekudyidzana uye ichi hachisi rokupedzisira basa reDare cache processor.

Sokushandiswa kombiyuta Hardware ndangariro modules kwakavakirwa DRAM michina (simba ndangariro chero kuwana). Zvinoumba ruzivo urwu mune pasi cost, mukuru akavimbika uye ... pazera pasi nokukurumidza. DRAM akashandisa makore gumi apfuura, kunyange zvazvo vachiri nomumugwagwa kwaitora nguva okunatsiridza ayo. Kana panguva kuwana ndangariro masero ari kunonoka anenge 200 nanoseconds, ipapo zvino kukosha iyi kukunda chipingamupinyi 20 NS. Zvinoita sokuti - nokukurumidza kunofanira kungova zvakazonaka! Zvisinei, muna kufanana kuvandudzika pakati DRAM rakawedzera inogona ari processor bhazi, saka zvinonyatsorehwa reshiyo yachinja kudaro sezvo kugona. Pano tinosvika mubvunzo kuti zvakataurwa cache. Ndingaita sei kuwedzera mabasa ari subsystem Computer Memory? Mhinduro iri pachena - zvinokwanisika kuti kutsiva zvisingachashandi DRAM zvimwe mberi. Asi wakashata Intel ruzivo pamwe zvinodhura zvipfigiso Rambus akataura kuti yokutsiva haafaniri yekudyidzana kuwedzera nhamba mutengo.

Pasina kumanikana ichi, hapana zvaisamboita vakafunga kuti Maive akadaro, nokuti mashandiro akadaro zvaisazova zvikuru pfungwa. Yakakwana kutsiva zvakawanda yepamusoro DRAM SRAM (kunofambira mberi kurongwa kuyeukwa mukana) uye dambudziko kuti kugadziriswa. Asi izvi zvingadai kunotoreva kuwedzera mutengo. Saka ini avasarudzira imwe nekuyanana shanduro yakanga kubudirira kuti rinoshanda kubvira panguva yokutanga 80286-nokukurumidza ndangariro kutigumbura zvakarongwa kuwedzera mabasa ezvinhu pakati pfupi kunonoka ndangariro modules uye mukuru-nokukurumidza processor. Hama kuti huwandu DRAM masero zvikuru kusakosha mari, kubvira 8 kbps (pamwero L1) kusvika makumi megabytes (L3 chechetere). Special controller ichipfuura munhu bi achitaura mashoko rukova uye makopi kwavari kutsanya ndangariro. Panguva inotevera chikumbiro CPU kuti DRAM controller macheki kana hapana "kuruboshwe" kurudyi Data, uye kana vari akawanikwa, nokupfuuridzirwa processor anongova cache. Sezvinogona kuoneka, asi uchishandisa pfungwa iri nyore. Zvinetso zviri nzira Implementation: Developers kusarudza kuti mashoko mhando ndiyo nouya, sei kuti dzifambirane nenguva, sei kuvandudza basa kunyatsoshanda, etc. Asi ichi chakakura chaizvo nyaya, saka yakawanda inogona kuwanika unyanzvi zvinyorwa ..

Saka, mhinduro yomubvunzo wokuti chii Maive ndangariro, anogona akagadzira sezvinotevera: the cache chinhu buffer izvo kupinda controller anonyora / inoti data, kuwedzera mabasa kuyeuka subsystem.

Uye panyaya nomumbure chikumbiro ndechokuti cache? The Browser mushandisi kana kuona mapeji paIndaneti uchishandisa imwe mhinduro. Kana Panovhurwa chero zvinhu zvayo rokutanga, mapeji akawanda (mufananidzo Data) akachengetwa ari forodha pamusoro Disc, uye nokuda hunotevedzana accesses date ichi haina kuremerwa kubva kunonoka website, uye vari akaiswa folder, kuwedzera Surfing chaizvo. Kumhanyisa kunonyanya kuoneka panguva yakaderera aimhanya Indaneti.