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词汇 context switch
释义 context switch短语⁸⁴³²⁰⁺
基本例句
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On such systems, operations that affect thread scheduling require a context switch to the kernel, which is expensive.
因此,这类系统调度线程时必须切换到内核,成本很高。51cto

In most practical application, context switch doesn't happen at some time tick, so sometime the execution of timer ISR is useless and wastes CPU time.
在实际应用中,并不是每个时钟节拍都有任务调度,所以有很多时钟中断服务程序的工作是多余的,浪费了 CPU资源。 cnki
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