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Re: sleep in microsecond or nanosecond
From: |
Samuel Thibault |
Subject: |
Re: sleep in microsecond or nanosecond |
Date: |
Mon, 16 Aug 2010 17:08:11 +0200 |
User-agent: |
Mutt/1.5.12-2006-07-14 |
Da Zheng, le Mon 16 Aug 2010 06:02:17 -0400, a écrit :
> Should we still handle the special cases in mach_msg or in another system
> call?
>
> While sleeping in microseconds or nanoseconds, the kernel should do the loop
> on
> the behalf of the user process. Why do we still need a wakeup queue?
You don't want to busy-loop for whole microseconds, but rather use a
hardware clock for that and get an interrupt when it's time to resume
the user process.
Samuel