Hauv computer science, tus nqi-monotonic scheduling (RMS) yog a qhov tseem ceeb ntawm kev ua haujlwm algorithm siv nyob rau hauv lub sijhawm ua haujlwm tiag tiag (RTOS) nrog cov chav kawm zoo li qub. Qhov tseem ceeb ntawm qhov tseem ceeb yog muab raws li lub voj voog lub sijhawm ntawm txoj haujlwm, yog li lub sijhawm luv luv ua rau muaj qhov tseem ceeb ntawm txoj haujlwm siab dua.
Yuav ua li cas qhov kev xav tau ua hauv tus nqi monotonic teem sijhawm?
Kev xav nrog tus nqi monotonic tsom xam yuav tsum muaj cov kev xav hauv qab no [4]: • Kev hloov ua haujlwm yog tam sim ntawd. relinquish CPU tsuas yog thaum ua tiav. Hnub kawg ntawm kev ua haujlwm yog ib txwm nyob rau thaum pib ntawm lub sijhawm tom ntej. txoj haujlwm tseem ceeb yeej tsis ua tiav thaum txoj haujlwm tseem ceeb dua yog npaj ua tiav.
Dab tsi yog qhov tseeb ntawm tus nqi monotonic teem sijhawm?
Rate monotonic scheduling yog txoj cai tswj xyuas qhov tseem ceeb tshaj plaws uas qhov ntau zaus (1 / lub sijhawm) ntawm txoj haujlwm, qhov siab dua yog qhov tseem ceeb. Txoj hauv kev no tuaj yeem siv tau rau hauv txhua qhov kev khiav hauj lwm uas txhawb nqa qhov tseem ceeb ntawm cov txheej txheem preemptive, xws li DSP/BIOS thiab VxWorks.
laxity hauv RTOS yog dab tsi?
Laxity: Qhov txawv ntawm lub sijhawm kom txog rau thaum lub sijhawm ua haujlwm tiav thiab nws cov sijhawm ua haujlwm tseem tshuav. ib tug laxity yog muab rau txhua txoj hauj lwm nyob rau hauv lub system thiab yam tsawg kawg nkaus laxity hauj lwm yog ua ntej.
RMA yog dab tsi hauv qhov system embedded?
Tus tus nqi monotonic algorithm (RMA) yog tus txheej txheemtxhawm rau muab qhov tseem ceeb ruaj khov rau cov haujlwm kom ua kom lawv "sedulability." Kev teeb tsa ua haujlwm raug txiav txim siab teem sijhawm yog tias txhua txoj haujlwm ua tau raws li lub sijhawm kawg txhua lub sijhawm.
