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    • 1. 发明申请
    • SCHEDULING MEMORY ACCESS REQUESTS USING PREDICTED MEMORY TIMING AND STATE INFORMATION
    • 使用预测的存储器时序和状态信息调度存储器访问请求
    • WO2011126625A3
    • 2011-12-22
    • PCT/US2011026632
    • 2011-03-01
    • FREESCALE SEMICONDUCTOR INCXU KUNKRAMER DAVID B
    • XU KUNKRAMER DAVID B
    • G06F13/16G06F13/14
    • G06F13/1689G06F12/0215
    • A data processing system (100) employs an improved arbitration process (600) in selecting pending memory access requests received from the one or more processor cores (11) for servicing by the memory (16). The arbitration process uses memory timing and state information (401) pertaining both to memory access requests (300, 501) already submitted to the memory for servicing and to the pending memory access requests (300, 501) which have not yet been selected for servicing by the memory (16). The memory timing and state information (401) may be predicted memory timing and state information; that is, the component (14) of the data processing system (100) that implements the improved scheduling algorithm (600) may not be able to determine the exact point in time at which a memory controller (15) initiates a memory access for a corresponding memory access request and thus the component (14, 304) maintains information that estimates or otherwise predicts the particular state of the memory (16) at any given time.
    • 数据处理系统(100)在选择从一个或多个处理器核心(11)接收到的用于由存储器(16)进行服务的待决存储器访问请求时采用改进的仲裁过程(600)。 仲裁过程使用与已经提交给用于服务的存储器的存储器访问请求(300,501)和尚未被选择用于服务的未决存储器访问请求(300,501)有关的存储器定时和状态信息(401) 通过存储器(16)。 存储器定时和状态信息(401)可以是预测的存储器定时和状态信息; 也就是说,实现改进调度算法(600)的数据处理系统(100)的组件(14)可能不能确定存储器控制器(15)发起存储器访问的确切时间点 相应的存储器访问请求,并且因此组件(14,304)维持在任何给定时间估计或以其他方式预测存储器(16)的特定状态的信息。