Subject: Re: PS/2 mouse latency was Re: [linux-audio-dev] Re: [DATAPOINT] kernels and latencies
From: Richard Gooch (rgooch_AT_ras.ucalgary.ca)
Date: Tue Jul 04 2000 - 21:23:10 EEST
Alan Cox writes:
> > > > > Note: I have seen X causing 50 ms latencies...
> > > > > [aux_write_dev+26/28]
> > > >
> > > > awwwww.. Yuk. What a piggy little function!
> > >
> > > Yuck! It's even disabling interrupts for that long.
> >
> > Does anybody know if it just stupid locking or if the hardware
> > requires interrupts off ?
>
> The PS/2 hardware requires delays, but it does not require that
> interrupts are off for the entire period to my knowledge.
OK, but there's still the locking. We can't just have the interrupt
handler frob the controller while elsewhere we're poking it, can we?
Regards,
Richard....
Permanent: rgooch_AT_atnf.csiro.au
Current: rgooch_AT_ras.ucalgary.ca
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