Kev Ua Haujlwm: Lub ntsiab tsis zoo ntawm lub semaphore yog uas nws yuav tsum tsis khoom tos Nplua nuj tos khib CPU uas qee qhov txheej txheem yuav tuaj yeem siv tau. Hom semaphore no tseem hu ua spinlock vim cov txheej txheem tig thaum tos lub xauv.
Puas semaphores muaj tos queues?
Semaphore kev sivSemaphores tuaj yeem siv rau hauv qhov kev khiav haujlwm los ntawm kev cuam tshuam nrog cov txheej txheem hauv xeev thiab teem caij: cov xov uas raug thaiv ntawm lub semaphore yog txav los ntawm kev khiav mus rau tos (semaphore tshwj xeeb tos queue).
Puas mutexes siv tibneeg hu tauj coob tos?
Standard piv rau spin mutexes:
Idle tos: xov tos xauv lub mutex raug thaiv nyob rau hauv ib tug tos lub xeev raws li piav nyob rau hauv Tshooj 2. Nws tso CPU, uas tuaj yeem siv los khiav lwm txoj xov. … Ib tug tibneeg hu tauj coob tos, kuj hu ua ib tug tig tos, nyob rau hauv uas ib tug xov tos xauv lub mutex tsis tso CPU
Dab tsi yog qhov txawv ntawm semaphore thiab mutex?
A mutex yog ib yam khoom tab sis semaphore yog tus lej sib txawv. … Ib yam khoom mutex tso cai ntau cov txheej txheem xovnkag mus rau ib qho kev sib koom ua ke tab sis tsuas yog ib zaug xwb. Ntawm qhov tod tes, semaphore tso cai rau ntau cov txheej txheem xov kom nkag mus rau qhov kawg ntawm cov peev txheej kom txog thaum muaj.
Dab tsi yog qhov teeb meem tseem ceeb ntawm semaphores?
Classical teeb meem ntawm Synchronization nrog Semaphore Solution
- Bounded-buffer (los yog Tus Tsim Khoom-Consumer) Teeb meem: Cov teeb meem Bounded Buffer kuj hu ua teeb meem tsim khoom siv. …
- Dining-Philosphers Problem: …
- Cov Neeg Nyeem thiab Sau Cov Teeb Meem: …
- Pleeping Barber Problem:
