| 11. | The system is based on a microkernel, with only 5000 lines of code running in kernel mode.
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| 12. | Kernel mode drivers exist in three levels : highest level drivers, intermediate drivers and low level drivers.
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| 13. | This also allows for increased security and stability resulting from the reduced amount of code running in kernel mode.
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| 14. | In most existing systems, switching from user mode to kernel mode has an associated high cost in performance.
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| 15. | The DirectMusic kernel mode synthesizer that supplies the DirectMusic components with a high-resolution timer has been removed.
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| 16. | Instead, the HAL provides services primarily to the Windows executive and kernel and to kernel mode device drivers.
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| 17. | The most widely supported kernel mode of oprofile uses a system timer ( See : sparc64, ppc64, AVR32.
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| 18. | Also, the DirectMusic kernel mode synthesizer that supplies the DirectMusic components with a high-resolution timer has been removed.
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| 19. | They can show the relative amount of time spent in user mode versus interruptible kernel mode such as system call processing.
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| 20. | Because the handler for an ioctl call resides directly in kernel mode, the input from userspace should be validated carefully.
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