Is there a delay which yields?
barney_cordoba at yahoo.com
Sun Mar 15 11:43:20 PDT 2009
--- On Sun, 3/15/09, Julian Elischer <julian at elischer.org> wrote:
> From: Julian Elischer <julian at elischer.org>
> Subject: Re: Is there a delay which yields?
> To: barney_cordoba at yahoo.com
> Cc: current at freebsd.org
> Date: Sunday, March 15, 2009, 1:16 PM
> Barney Cordoba wrote:
> > I'd expect DELAY to yield till timeout but a task
> with a delay loop just
> > runs to 100% usage. Is there a function which can
> yield exectution for
> > a set amount of time (without having to use a timer)?
> DELAY is designe for use early in the boot when thre are no
> it is only occasionally used for cases during normal
> how would a thread know how long it has been away if no
> timer is used?
I guess I mean a sleep.
Also, this is a kernel driver. I have a device
which requires a toggle with a 10ms delay between pulses. I hate to
tie up the cpu for 10ms with a delay. Sort of like the following:
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