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    • 9. 发明申请
    • Trace synchronization
    • 跟踪同步
    • US20100257510A1
    • 2010-10-07
    • US12385319
    • 2009-04-03
    • John Michael HorleyAndrew Brookfield SwaineThomas Sean HoulihaneSheldon James WoodhouseMichael John Williams
    • John Michael HorleyAndrew Brookfield SwaineThomas Sean HoulihaneSheldon James WoodhouseMichael John Williams
    • G06F9/44
    • G06F11/3636G06F11/348G06F11/3632G06F11/3648
    • A data processing apparatus having one or more trace data sources is provided in which the trace data sources operate to generate respective streams of trace data. At least one of said trace data sources comprises a trace data generator responsive to activity in monitored circuitry to generate trace data representing said activity. A synchronization marker generator is coupled to the trace data generator and operates to generate a synchronization marker and insert the synchronization marker into the trace data stream. The synchronization marker identifies a synchronization position in the trace data stream. A controller is coupled to the synchronization marker generator, and operates to initiate the synchronization marker generator to generate and insert a synchronization marker into the trace data stream. The controller controls initiation in dependence on behavior of the data processing apparatus downstream of the trace data generator with respect to trace data flow. In this way, the downstream behavior of the data processing apparatus can be made to influence the rate and timing of insertion of synchronization markers into a trace data stream, thereby reducing the likelihood of the volume of trace data resulting in an overflow condition in the downstream circuitry.
    • 提供具有一个或多个跟踪数据源的数据处理装置,其中跟踪数据源操作以产生相应的跟踪数据流。 所述跟踪数据源中的至少一个包括跟踪数据生成器,其响应于所监视的电路中的活动以产生表示所述活动的跟踪数据。 同步标记生成器耦合到跟踪数据生成器,并且操作以产生同步标记并将同步标记插入到跟踪数据流中。 同步标记识别跟踪数据流中的同步位置。 控制器耦合到同步标记生成器,并且操作以启动同步标记生成器以生成并将同步标记插入到跟踪数据流中。 控制器根据跟踪数据生成器下游的数据处理设备的行为相对于跟踪数据流控制启动。 以这种方式,可以使数据处理装置的下行行为影响将同步标记插入到跟踪数据流中的速率和定时,从而减少跟踪数据量导致下游溢出状态的可能性 电路。