Today , multiprocessor systems are cheap and plentiful , nearly every major microprocessor has built - in support for multiprocessing , and many support dozens or hundreds of processors 现在,多处理器系统很便宜,而且数量很多,几乎每个主要微处理器都内置了多处理支持,其中许多系统支持数十个或数百个处理器。
Task scheduling aims at scheduling a set of partially ordered computational tasks onto a multiprocessor system by a given strategy in order to obtain a better system performance 任务调度问题是指根据一定的调度策略,把一组并行处理的任务按规定的时序分配到系统的多个处理机节点上,以期获得较好的系统执行性能。
So it must be amended according to requirements of embedded system and multiprocessor system . the new system uses arm9 core and adopts a dual buses structure : a general system bus and a can - bus 在最终实现时,由于arm9核处理器不支持smp多处理器结构,因此系统采用了一种双总线结构:一条原来意义上的系统总线,一条can总线。
The research of satellite - carried embedded multiprocessor system is a challenging research domain , including parallel compute theory , real - time system theory , system fault - tolerant and software reliability theory 星载嵌入式多处理器系统的研究是一个具有挑战性的研究领域,涉及到并行计算理论、实时系统原理以及系统容错和可靠性设计验证理论。
Multicast routing algorithm is extremely important to the communication performance of interconnection network and multiprocessor systems . taking into account the performance , cost and implementation difficulty , a new tree - based restricted multicast routi . . 针对基三分层互连网络,在权衡性能成本和实现的基础上,提出一种基于树的受限多播路由算法trma 。
All of these optimizations are to aid in higher performance , and are generally transparent to the user , but on multiprocessor systems , these complexities may sometimes show through . part 2 , " how will the jmm change under jsr 133 所有的这些优化是为了帮助实现更高的性能,通常这对于用户来说是透明的,但是对多处理系统来说,这些复杂的事情可能有时会完全显现出来。
Then , we give some description about the working principle , organization , function of router - cache and where it should be . we also gave out a cache coherence protocol for multiprocessors systems with router - caches 本文接着描述了路由器cache的工作原理,对其的组织、在系统中的位置、应有的功能等方面进行了讨论,并设计了含有路由器cache的多处理器系统的cache一致性协议。
But in a multiprocessors system , there may be several processors have read the same data , and then one processor will write it . this time , the copy of the data in the caches of other processors will be out of date 但在多处理器系统中,由于多个处理器可能对同一数据块进行读操作,当某个处理器对共享的数据块进行写操作时,其它处理器的cache中该数据块的副本将成为过时的数据。
In the research and implement of the multiprocessor system , we have developed a smp like structure which two cpus share a memory , and a cool backup system for the fault - tolerant . this system can meet the requirement of reliability 在多处理器系统体系结构的研究实现上,我们采用了双cpu共享内存的类smp结构,同时进行了系统冷备份冗余的容错设计,保证星载多处理器实时系统的可靠性。
We developed the support modules for multiprocessor and i / o subsystem . the satellite - carried embedded multiprocessor system adopted the high reliability 1553b bus and high speed ieee1394 bus , which have met the reliability and information processing requirement 我们研发的星载嵌入式多处理器系统的i / o子系统采用了可靠性高的1553b总线以及传输速率高的ieee1394总线,从而满足了系统对于可靠性和信息处理能力的要求。