Hi all,
I have a nice little Giga-Byte GA6BXDS with a couple
PII/350s. Everything seems to run very well, but I'm a little
perplexed by my /proc/interrupts output:
CPU0 CPU1
0: 27762 24501 IO-APIC-edge timer
1: 564 520 IO-APIC-edge keyboard
2: 0 0 XT-PIC cascade
4: 1641 1456 IO-APIC-edge serial
8: 2 0 IO-APIC-edge rtc
12: 2880 2685 IO-APIC-edge PS/2 Mouse
13: 1 0 XT-PIC fpu
14: 4574 4085 IO-APIC-edge ide0
16: 674 665 IO-APIC-level aic7xxx, aic7xxx, Intel EtherExpress Pro
10/100 Ethernet
17: 0 0 IO-APIC-level Ensoniq AudioPCI
NMI: 0
IPI: 0
What bugs me is interrupt 16. I've got a lot of my machine on a UDMA
ide drive (vs my ancient, slow 8-bit SCSI drive), and my LAN gets not
too much traffic, so I guess the load isn't really that bad... but
wait, there's more:
01:00.0 VGA compatible controller: Matrox Graphics, Inc. MGA G200 [Millennium G200
AGP] (rev 01)
Subsystem: Unknown device 102b:ff03
Flags: bus master, VGA palette snoop, medium devsel, latency 64, IRQ 16
Memory at e8000000 (32-bit, prefetchable)
Memory at e4000000 (32-bit, non-prefetchable)
Memory at e5000000 (32-bit, non-prefetchable)
my graphics card is also on IRQ 16! (err, I notice that it is on a
different - presumably AGP - bus, so this probably doesn't count)
Why is linux deciding that two AIC7895 UW SCSI controllers, a 100Mb
ethernet card, and my video card should all get interrupt 16, when
under normal usage these are some of the more high-bandwith devices
one can have?
Anyone know anything about interrupt allocation? Is this even a
concern?
Thanks from an ignoramus...
--
Brendan Cully
[EMAIL PROTECTED]
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