Video: Dab tsi yog siv los txiav txim seb ib daim ntawm cov ntaub ntawv hauv cache yuav tsum tau sau rov qab rau cache?
2024 Tus sau: Lynn Donovan | [email protected]. Kawg hloov kho: 2023-12-15 23:47
Cov me ntsis kuj qhia txog qhov cuam tshuam ntawm kev nco uas tau hloov kho thiab tsis tau khaws cia rau qhov chaw khaws cia. Vim li no, yog tias ib daim ntawm cov ntaub ntawv hauv cache yuav tsum tau sau rov qab rau cache qhov qias neeg me ntsis yuav tsum tau teem 0. qias neeg me ntsis =0 yog cov lus teb.
Ntawm no, dab tsi yog sau los ntawm thiab sau rov qab cache?
Sau - rov qab (los yog Sau - qab): Kev sau ntawv tsuas yog ua rau cov cache . Ib qho hloov kho cache block yog sau rov qab mus rau lub khw, ua ntej nws hloov. Sau - dhau : Thaum cov ntaub ntawv hloov tshiab, nws yog sau rau ob qho tib si cache thiab cov rov qab - kawg cia. Sau - rov qab : Thaum cov ntaub ntawv isupdated, nws yog sau tsuas yog mus rau cache.
Tsis tas li ntawd, dab tsi yog sau allocate cache? Ib nyeem faib txoj cai faib a cache kab tsuas yog nyeem. A sau faib txoj cai faib a cache kab rau ib tug nyeem los yog sau uas misses inthe cache (thiab yog li tej zaum yuav raug hu ua aread- sau cache faib txoj cai).
Tsuas yog li ntawd, dab tsi yog qhov qias neeg hauv cache?
Cov qias neeg yog teem thaum lub processor sau rau (hloov) lub cim xeeb no. Cov me ntsis qhia tau hais tias nws cov block ntawm lub cim xeeb tau raug hloov kho thiab tseem tsis tau khaws cia rau qhov chaw cia. Cov khoom qias neeg yog siv los ntawm CPU cache thiab hauv nplooj ntawv hloov algorithms ntawm lub operating system.
Nyeem allocate cache yog dab tsi?
A5.6 Txog nyeem faib hom. Lub processor txhawb nyeem faib hom, tseem hu ua sau streamingmode, ob qho tib si rau L1 thiab L2 cache . Nyeem faib hom yog qhov ua tau zoo thiab txuag hluav taws xob optimization rau kev sau cov ntaub ntawv loj loj.
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