| 摘要 |
A method and system for controlling interrupt frequency by transferring processor load information to a peripheral adapter provides adaptive interrupt latency to improve performance in a processing system. A device driver obtains current processor load information from an operating system or directly from processor usage counters. The estimated processor load is then used to set a parameter in the adapter that controls the frequency of an interrupt generator, which may be controlled by setting an interrupt queue depth threshold, packet frequency threshold or interrupt hold-off time value. The result is that the relative frequency of interrupts is managed in conformity with the current processor load, provide reduced processing latency when the system is relatively idle, which avoids loading the processor with additional interrupt processing overhead when the processor is busy.
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