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    • 8. 发明申请
    • SCHEDULE DECISION DEVICE, PARALLEL EXECUTION DEVICE, SCHEDULE DECISION METHOD, AND PROGRAM
    • 附表决议装置,并行执行装置,时间表决策方法和方案
    • US20110209153A1
    • 2011-08-25
    • US13063232
    • 2009-08-20
    • Noriaki SuzukiJunji Sakai
    • Noriaki SuzukiJunji Sakai
    • G06F9/46
    • G06F9/5038G06F2209/5017G06F2209/506
    • A schedule decision method acquires dependencies of execution sequences required for a plurality of sub tasks into which a first task has been divided; generates a plurality of sub task structure candidates that satisfy said dependencies and for which a plurality of processing devices execute said plurality of sub tasks; generates a plurality of schedule candidates by further assigning at least one second task to each of said sub task structure candidates; computes an effective degree that represents effectiveness of executions of said first task and said second task for each of said plurality of schedule candidates; and decides a schedule candidate used for the executions of said first task and said second task from said plurality of schedule candidates based on said effective degrees.
    • 时间表决定方法获取第一任务被划分到的多个子任务所需的执行序列的依赖关系; 生成满足所述依赖性的多个子任务结构候选,并且多个处理装置执行所述多个子任务; 通过对每个所述子任务结构候选进一步分配至少一个第二任务来生成多个调度候选; 计算表示对于所述多个日程表候选中的每一个的所述第一任务和所述第二任务的执行的有效性的有效程度; 并且基于所述有效度,从所述多个日程表候选中确定用于执行所述第一任务和所述第二任务的日程表候选。
    • 9. 发明申请
    • MULTIPROCESSOR SYSTEM, AND METHOD FOR SHARED USE OF DEVICES AMONG OPERATING SYSTEMS OF MULTIPROCESSOR SYSTEM
    • 多处理器系统的操作系统中的设备共享使用的多处理器系统和方法
    • US20100325329A1
    • 2010-12-23
    • US12919636
    • 2009-02-24
    • Junji Sakai
    • Junji Sakai
    • G06F13/24G06F9/44
    • G06F9/544G06F9/545
    • With a system in which a plurality of OSs run on a multi-core processor and which is based on a client-server approach where one OS performs device access on behalf of the other OSs, if a device is to be accessed from tasks on the plurality of OSs, there have been problems of a reduction in performance and an increase in design and manufacturing cost due to the necessity of providing proxy servers.In a multiprocessor system with a plurality of OSs 40, 50 running thereon, each of the plurality of OSs has a device driver 41, 51 which accesses devices for shared use among the OSs, wherein the device driver has at least either of a device interface part 45 or a task interface part 44, 54 which performs inter-OS communication at the OS kernel layer, and wherein the device interface part 45 accesses a device 14 to be operated by the device driver and the task interface part receives a device access request from a task running on each OS and returns a device access result to the task.
    • 利用其中多个OS在多核处理器上运行并且基于客户机 - 服务器方法的系统,其中一个OS代表其他OS执行设备访问,如果要从设备上的任务访问设备 多个OS,由于需要提供代理服务器,存在性能下降和设计和制造成本增加的问题。 在其上运行多个OS40,50的多处理器系统中,多个OS中的每一个具有一个设备驱动器41,51,该驱动器访问OS之间共享使用的设备,其中该设备驱动器具有至少一个设备接口 部分45或任务接口部分44,54,其在OS内核层执行OS间通信,并且其中设备接口部分45访问要由设备驱动器操作的设备14,并且任务接口部分接收设备访问请求 从每个操作系统上运行的任务,并将设备访问结果返回给任务。