Njengazo zonke izinto ze-System V IPC, ukufinyelela ezindaweni zememori okwabelwana ngazo kulawulwa ngokhiye nokuhlola amalungelo okufinyelela. Uma inkumbulo yabiwe, akukho ukuhlola ukuthi izinqubo ziyisebenzisa kanjani. Kumelwe bathembele kwezinye izindlela, isibonelo ama-Semaphores eSistimu V, ukuvumelanisa ukufinyelela kumemori.
Imemori eyabiwe yenziwa kanjani ku-Linux?
Ukufinyelela izinto zememori eyabiwe ngohlelo lwefayela Ku-Linux, izinto zememori okwabelwana ngazo zidalwa ngaphakathi a (tmpfs(5)) isistimu yefayela ebonakalayo, ngokuvamile ifakwe ngaphansi kwe-/dev/shm. Kusukela ku-kernel 2.6. 19, i-Linux isekela ukusetshenziswa kohlu lokulawula ukufinyelela (ACLs) ukulawula izimvume zezinto kusistimu yefayela ebonakalayo.
Isetshenziswa kanjani imodeli yenkumbulo eyabiwe ukuze kuzuzwe i-IPC?
I-Inter Process Communication ngokusebenzisa inkumbulo eyabiwe ingumqondo lapho inqubo ezimbili noma ngaphezulu zingafinyelela inkumbulo evamile. … Iklayenti lifunda idatha esiteshini se-IPC, futhi edinga ukuthi idatha ikopishwe ku-IPC buffer ye-kernel iye kusigcina sedatha yeklayenti. Ekugcineni idatha ikopishwa kubhafa yeklayenti.
Ngilusebenzisa kanjani uhlelo lwenkumbulo eyabiwe ku-Linux?
Izinyathelo : Sebenzisa i-ftok ukuze uguqule igama lendlela nesihlonzi sephrojekthi sibe ukhiye we-System V IPC. Sebenzisa shmget eyaba ingxenye yenkumbulo eyabiwe. Sebenzisa i-shmat ukuze unamathisele ingxenye yenkumbulo eyabiwe ekhonjwe i-shmid esikhaleni sekheli senqubo yokushaya.
Uyini umehluko phakathi kwenkumbulo eyabiwe nokudluliswa komlayezo?
Kulo modeli, izinqubo zixhumana zodwa ngokuthumelelana imiyalezo.
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Umehluko phakathi Kwemodeli Yenkumbulo Eyabiwe kanye Nemodeli Yokudlula Umlayezo ku-IPC :
| S.No | Imodeli Yenkumbulo Eyabiwe | Imodeli Yokudlula Umlayezo |
|---|---|---|
| 1. | Indawo yenkumbulo eyabiwe isetshenziselwa ukuxhumana. | Indawo yokudlulisa imiyalezo isetshenziselwa ukuxhumana. |
Isiphi isibonelo senkumbulo eyabiwe?
Ekuhlelweni kwekhompiyutha, inkumbulo eyabiwe iyindlela lapho izinqubo zohlelo zingashintshanisa idatha ngokushesha kunokufunda nokubhala kusetshenziswa izinsiza zesistimu yokusebenza evamile. Ngokwesibonelo, a inqubo yeklayenti ingase ibe nedatha okufanele idluliselwe kunqubo yeseva ukuthi inqubo yeseva iwukuguqula futhi ibuyele kuklayenti.
Uyidala futhi uyiphathe kanjani ingxenye yenkumbulo eyabiwe?
Inkumbulo Eyabiwe
- Dala ingxenye yenkumbulo eyabiwe noma sebenzisa ingxenye yenkumbulo eyabiwe eseyakhiwe (shmget())
- Namathisela inqubo engxenyeni yememori eyabiwe eseyakhiwe (shmat())
- Susa inqubo engxenyeni yenkumbulo eyabiwe kakade enamathiselwe (shmdt())
- Lawula imisebenzi engxenyeni yenkumbulo eyabiwe (shmctl())
Iyini i-Shmem ku-Linux?
I-SHMEM (kusuka kulabhulali “yenkumbulo eyabiwe” ye-Cray Research) iyi- umndeni wemitapo yolwazi yezinhlelo ezifanayo, ihlinzeka ngohlangothi olulodwa, i-RDMA, ukuxhumana okucutshungulwa ngokufanayo kwamakhompiyutha amakhulu enkumbulo esabalalisiwe enenkumbulo encane. Isifinyezo se-SHMEM kamuva sahlehliswa ukuze sisho “Symmetric Hierarchical MEMory”.
Ubani osebenzisa imodeli yenkumbulo eyabiwe?
Wonke amasistimu we-POSIX, kanye nezinhlelo zokusebenza zeWindows zisebenzisa inkumbulo eyabiwe.
Yini okwabelwana ngayo phakathi kwezinqubo?
Iyini inkumbulo eyabiwe? Inkumbulo eyabiwe iyona indlela yokuxhumana eshesha kakhulu. Isistimu yokusebenza yenza imephu ingxenye yememori endaweni yekheli yezinqubo ezimbalwa, ukuze izinqubo ezimbalwa zifunde futhi zibhale kuleyo ngxenye yememori ngaphandle kokubiza imisebenzi yesistimu yokusebenza.
Uyini umsebenzi oyinhloko wenkumbulo eyabiwe?
Umsebenzi oyinhloko wenkumbulo ehlanganyelwe ukwenza ukuxhumana phakathi kwenqubo. Inqubo yonke yokuxhumana kwimemori eyabiwe yenziwa Inkumbulo Ehlanganyelwe. Inkumbulo eyabiwe ifinyelelwa izinhlelo eziningi. Singakwazi ukufinyelela izinhlelo eziningi kukhompuyutha yethu futhi Uhlelo lokusebenza lwenziwa ngosizo Lwenkumbulo Eyabiwe.
Ingakanani inkumbulo eyabelwe i-Linux?
20 Uhlelo lwe-Linux lukhawulela umkhawulo kasayizi wesegimenti yememori eyabelwe kubo 32 MByte (amadokhumenti aku-inthanethi athi umkhawulo ungu-4 MBytes!) Lo mkhawulo kufanele ushintshwe uma amaqembu afanayo amakhulu azosetshenziswa kumasegimenti enkumbulo eyabelwe.