Now , there is a trend to use java in real - time applications . nevertheless , java lacks some necessary real - time capabilities , such as scheduling , memory management , and asynchronous control , so there are many limitations for using java in real - time fields 現在有種嘗試是將java用于實時應用之中,但是由于它缺乏對必要的實時要求的支持,如調度、內存管理、異步控制等等方面,以及它自身執行方面的缺陷,使得它在該領域的使用受到很大的限制。
Third , on the base of the improved architecture , two scheduling algorithms have been designed : acbs and cbstdm , which both are distributed traffic scheduling schemes and totally different from the traditional fabric scheduling schemes . the traditional fabric scheduling algorithms push the data towards egress ; however , acbs and cbstdm pull data from ingress . in acbs , ingress and egress transfer asynchronous control messages to finish distributed “ one - hop ” scheduling 再次,在改進結構基礎上設計了兩種調度算法acbs和cbstdm ,兩種算法均屬于流調度算法,采用分布式的調度方式,與傳統的用于多級結構的集中式兩次匹配的調度算法有很大的區別,傳統算法將輸入端口的數據包“推”向交換結構的輸出端口,而acbs算法和cbstdm算法是通過輸出調度器將數據包從輸入端口“拉”向輸出端口。