Messages in this thread | | | Subject | Re: Task queue makes slow device even slower | Date | Wed, 27 Oct 1999 18:34:37 +0100 | From | David Woodhouse <> |
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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.)
---- ---- ---- David Woodhouse David.Woodhouse@mvhi.com Office: (+44) 1223 810302 Project Leader, Process Information Systems Mobile: (+44) 7976 658355 Axiom (Cambridge) Ltd., Swaffham Bulbeck, Cambridge, CB5 0NA, UK. finger dwmw2@ferret.lmh.ox.ac.uk for PGP key.
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