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Performance monitoring in a data processing apparatus capable of executing instructions at a plurality of privilege levels
Performance monitoring in a data processing apparatus capable of executing instructions at a plurality of privilege levels
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机译:能够以多个特权级别执行指令的数据处理设备中的性能监视
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摘要
A data processing apparatus has processing circuitry which can execute instructions at one of several privilege levels. A plurality of performance monitoring circuits are included. In response to an instruction executed at a first privilege level, first configuration data can be set for controlling performance monitoring by a first subset of performance monitoring circuits. A disable control flag can be set in response to an instruction executed at a second privilege level higher than the first privilege level. If the disable control flag has a predetermined value then performance monitoring control circuitry disables performance monitoring by the first subset of performance monitoring circuits while the processing circuitry is executing instructions at the second privilege level.
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