RE: Q: waiting for a short time and not beeing a resource hog

Ingo Molnar (mingo@chiara.csoma.elte.hu)
Wed, 1 Dec 1999 18:58:19 +0100 (CET)


On Wed, 1 Dec 1999, Bret Indrelee wrote:

> > > while( (jiffies-time_start) < 1 );
> >
> > you probably want to use schedule_timeout(deltajiffies). You must make
> > sure that you can reschedule at that point.
>
> If he is running in a bottom half or an interrupt handler, this wouldn't
> work. No task context to sleep on.

'You must make sure that you can reschedule at that point.'

> Depending on the definition of short, it may be easier to just put the code
> to execute on the tq_scheduler task queue. That will give a short delay
> between the interrupt or bottom half that will usually be less than a tick.

a timer is the best solution probably, if the necessery delay is bigger
than 10msec.

-- mingo

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