Messages in this thread | | | Subject | Re: Task queue makes slow device even slower | Date | Wed, 27 Oct 1999 23:58:59 +0200 (MEST) | From | (Rogier Wolff) |
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David Woodhouse wrote: > > alan@lxorguk.ukuu.org.uk said: > > You are constrained by timer resolution. Do you have a spare timer > > and irq you can rig for this. If not the best you can do is probably > > to use tq_immed and at least the udelays will not impact irq latency
> It's often been suggested, and it's a long way down my TODO list, > that we should have the facility to shift the kernel timer tick onto > the RTC, thereby leaving the 8254 timer available for this kind of > thing. (We can't use the RTC because its range of frequencies is > too restricted. It's fine for timer ticks, though.)
We really should implement soft timers, especially for the project that started this discussion (from the information I gathered from the replies).
Roger.
-- ** R.E.Wolff@BitWizard.nl ** http://www.BitWizard.nl/ ** +31-15-2137555 ** *-- BitWizard writes Linux device drivers for any device you may have! --* "I didn't say it was your fault. I said I was going to blame it on you."
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