Yuav ua li cas yog cache nco

Tsis yog txhua txhua computer tswv paub hais tias xws li ib tug cache, txawm hais tias nws yog nquag siv los ntawm kiag li txhua manufacturers, ob qho tib si processors thiab cov kev pab cuam. Ib txhia neeg muaj nyuam qhuav xwb pib los tsim ib tug tus kheej lub computer, tej zaum nyob rau hauv qhov kev sib tham forums nyob rau hauv lub ntiaj teb no Network yws ntawm qeeb ua tau zoo ntawm lawv cov hluav taws xob pab. Piv txwv li, yog tias 5 vib nas this kis ntawm pib ntawm lub chaw ua hauj lwm lossis cov kev pab cuam thiab cov emergence ntawm nws lub qhov rais, ces nws yog pom tias yuav ua tau ib tug zoo kawg li lub sij hawm. Los yog hais tias yog 10-15 vib nas this yog tsim nyog rau khau raj lub operating system los ntawm lub hard disk rau lub sib nqus platters - ib tug pov tseg ntawm lub sij hawm. Tsab: tsuas teb xyoo dhau los, lub community launch txog qhov kev pab cuam yuav coj mus yuav luag ib nrab ib feeb, thiab nws suav hais tias ceev ceev. Ib yam yog tseeb - ntau zog computer kev ua tau zoo ho thiab qhov no yog tsis yog qhov kawg lub luag hauj lwm ua si los ntawm lub cache processor.

Raws li siv nyob rau hauv computer hardware nco modules raws li nyob rau hauv DRAM technology (dynamic nco random saib). Nta ntawm no technology nyob rau hauv ib tug uas tsis muaj nqi, siab ntseeg thiab ... ib tug kuj tsis tshua muaj ceev. DRAM siv kaum xyoo dhau los, txawm hais tias tseem qeeb qeeb nws kho. Yog hais tias thaum lub sij hawm ntawm kev nkag tau rau lub cim xeeb hlwb qeeb txog 200 nanoseconds, ces tam sim no cov nqi no twb kov yeej lub teeb meem ntawm 20 NS. Nws yuav zoo li - ceev yuav tsum cia li zoo heev! Txawm li cas los, nyob rau hauv thaum uas tig mus nrog cov kev txhim kho ntawm DRAM kuj nce lub peev xwm ntawm lub processor tsheb npav, li ntawd, lub zuag qhia tag nrho piv tau hloov tsis yog li ntawd raws li nws tau. Ntawm no yog peb tuaj mus rau rau lo lus nug ntawm yog dab tsi lub cache. Yuav ua li cas Kuv yuav ua rau kom cov kev ua tau zoo ntawm cov subsystem Computer nco? Cov lus teb no yog cuab kev - nws yog tau los hloov obsolete DRAM ib yam dab tsi ntau hnyav. Tab sis cov muaj npe phem Intel kev nrog kim tuav Rambus pom tias cov kev hloov yuav tsum tsis txhob ho ua rau kom cov tag nrho cov nqi.

Qhov no tsis muaj kev txwv, tsis muaj ib tug yuav yeej tsis tau xav hais tias xws li ib tug cache, vim hais tias nyob rau hauv xws li ib tug mechanism yuav tsis muaj ntau npaum li cas point. Txaus los hloov ntau tshaj DRAM SRAM (zoo li qub random nco saib) thiab qhov teeb meem yuav tau daws. Tab sis qhov no yuav entail ib tug tseem ceeb nce nyob rau hauv tus nqi. Yog li ntawd kuv npaj ib tug hais nruab nrab version yog li ntawd kev vam meej uas siv los ntawm lub sij hawm ntawm thawj 80286-speed nco blocks cov txheej txheem yuav ua tau kom qhov kev kawm ntawm lub cev nruab nrab ntawm cov kuj qeeb nco modules thiab high-ceev processor. Tus kwv tij rau tus nqi ntawm DRAM hlwb yog tsis tshua muaj tsis tseem ceeb txaus npaum li cas, xws li los ntawm 8 kbps (qib L1) mus txog kaum tawm ntawm megabytes (L3 theem). Tshwj xeeb xws li kis tau los ntawm ib tug lis-directional cov ntaub ntawv kwj thiab cov ntawv luam ntawm lawv nyob rau hauv ib tug ceev ceev nco. Thaum lub tom ntej no thov lub CPU mus rau lub DRAM xws tshev seb puas muaj yog tsis muaj "tshuav" txoj cai NTAUB NTAWV, thiab yog hais tias lawv muaj nyob, cov kis processor yog cia li ib tug cache. Raws li yuav pom, cov kev khiav hauj lwm kuj yog heev yooj yim. Teeb meem tshwm sim nyob rau hauv txoj kev ntawm kev siv: developers muaj los mus txiav txim yog dab tsi zoo ntawm cov ntaub ntawv yog duplicate, yuav ua li cas hloov lawv, yuav ua li cas los txhim kho kev ua hauj lwm efficiency, etc. Tab sis qhov no yog ib tug heev loj lub ntsiab lus, yog li ntau ntawm nws muaj peev xwm yuav nrhiav tau nyob rau hauv tshwj xeeb qhov chaw ..

Yog li, cov lus teb rau lo lus nug ntawm yog dab tsi ib tug cache nco, tej zaum yuav formulated raws li nram no: lub cache yog ib tug tsis mus rau hauv uas xws li sau / nyeem cov ntaub ntawv, ua cov kev ua tau zoo ntawm lub cim xeeb subsystem.

Thiab nrog kev xav txog network daim ntawv thov uas yog cache? Qhov browser neeg siv thaum saib nplooj ntawv nyob rau hauv Internet siv tib cov tshuaj. Thaum tus thawj qhib ntawm tej yam ntawm nws lub ntsiab, ntau nplooj ntawv (duab cov ntaub ntawv) muab cia rau hauv ib lub tais ceev tseg rau cov disc, thiab rau tom ntej accesses no cov ntaub ntawv yog tsis loaded los ntawm qeeb web, thiab yog tso rau hauv daim nplaub tshev, ua caij saum nthwv dej ceev. Acceleration yog tshwj xeeb yog hnov thaum uas tsis muaj speeds ntawm hauv Internet.