When sharing interrupts as in:
11: 12785 XT-PIC eth0, uhci, bttv, serial
(part of 'cat /proc/interrupts' example)
the only reason for delay is the kernel, after having called one source irq routine, must ask "any other irq of same number pending?".
On classic PC arquitecture there are 15 hardware irq's. May be you refer to Nirvana PC's or to software interrupts.
----- Mensaje original -----
De: "Mark Hounschell"
CC: "SuSE"
Enviado: lunes, 03 de diciembre de 2001 10:23
Asunto: Re: [SLE] IRQ question
: Webillo Disperso wrote:
: >
: > There is no problem when sharing IRQ's if:
: > -Not ISA.
: > -Not mobo's serial/parallel (if used), ide's (if used), IRQ0, IRQ1, IRQ2, IRQ6, IRQ8 and IRQ13.
: > -Software is written for sharing.
:
: What is your definition of "no problem"? "It works"? Anytime I have had to share
: IRQ's I got
: a big performance hit. Yes it worked ok but the performance was unacceptable.
: Why do we STILL
: have to do this anyway? There are 256 interrupts available.
:
: --
: Mark Hounschell
: dmarkh@cfl.rr.com
:
: --
: To unsubscribe send e-mail to suse-linux-e-unsubscribe@suse.com
: For additional commands send e-mail to suse-linux-e-help@suse.com
: Also check the FAQ at http://www.suse.com/support/faq and the
: archives at http://lists.suse.com
: