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Performance(性能) o a major factor in system performance (O是系统性能的主要因素) Demands CPU to execute device driver, kernel l/o code (需要cPU执行设备驱动,核心WO代码) Context switches due to interrupts (因为中断而导致的上下文转换) Data copying(数据拷贝) Network traffic especially stressful(网络状况尤其重要) Applied Operating System Concepts Silberschatz, Galvin, and Gagne @199912.19 Silberschatz, Galvin, and Gagne ©1999 Applied Operating System Concepts Performance(性能) • I/O a major factor in system performance (I/O是系统性能的主要因素) – Demands CPU to execute device driver, kernel I/O code (需要CPU执行设备驱动,核心I/O代码) – Context switches due to interrupts (因为中断而导致的上下文转换) – Data copying(数据拷贝) – Network traffic especially stressful(网络状况尤其重要)
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