This has not been a problem in the past as I have been using only SIP and IAX connections. But I have ordered a digium TDM card and will be installing it tomorrow, and I would like to head off any potential problems if possible.
-Rusty
On 11/9/05, Andrew Kohlsmith <[EMAIL PROTECTED]> wrote:
On Tuesday 08 November 2005 18:20, George Pajari wrote:
> To make a long story short, according to Intel Dealer Technical Support
> (we became Intel dealers in order to get answers to our questions) there
> is no Intel motherboard that permits the IRQs to be configured uniquely.
> They are all hardwired and shared. This information applies to both the
> Intel Desktop Board and Server Board product lines.
I find this almost impossible to believe.
In XT-PIC mode, absolutely. However every modern chipset utilizes an IOAPIC
now and every device has its own IRQ line. When the IOAPIC is in emulation
(XT-PIC) mode, then yes many of the interrupts get "merged" into the standard
16 interrupts.
However, if your Linux kernel is utilizing the IOAPIC's native mode things
change drastically:
# cat /proc/interrupts
CPU0
0: 942314955 IO-APIC-edge timer
1: 10 IO-APIC-edge i8042
8: 1 IO-APIC-edge rtc
9: 0 IO-APIC-level acpi
12: 111 IO-APIC-edge i8042
14: 496236 IO-APIC-edge ide0
177: 211098355 IO-APIC-level eth0
185: 2 IO-APIC-level ehci_hcd:usb1
193: 0 IO-APIC-level ohci_hcd:usb2
201: 0 IO-APIC-level ohci_hcd:usb3
209: 86 IO-APIC-level ohci_hcd:usb4
217: 3769265646 IO-APIC-level wct4xxp
As you can see on this particular system (not an Intel reference board,
granted, but my Intel boards do work similarly) everything is on its own
interrupt, and the interrupt numbers don't stop at 15.
I'd really like some clarification on that... Do Intel reference boards
actually tie the physical INT# signals of peripherals together, or are they
just stating that unless you use the native IO-APIC mode you will have shared
interrupts due to the "emulation"?
Hopefully someone from Digium will step in and give the official word, because
I have it on good authority that Digium hardware on Intel motherboards work
well together. Hell, I've had my old P4 Intel reference board (with RamBus
memory) work just fine without shared interrupts.
-A.
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