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SubjectRe: ACPI vs. APM - Which is better for desktop and why?
Justin Piszcz wrote:
> I have enabled ACPI on my Dell GX1 (Pentium 3/500MHZ) machine and
> disabled APM, however, what are the benefits of using ACPI over APM?
>
> I am using Kernel 2.6.7
>
> I see ACPI eats up an IRQ and does not share it:
>
> $ cat /proc/interrupts
> CPU0
> 0: 64997374 XT-PIC timer
> 1: 10 XT-PIC i8042
> 2: 0 XT-PIC cascade
> 5: 2625 XT-PIC Crystal audio controller
> 8: 1 XT-PIC rtc
> 9: 0 XT-PIC acpi
> 10: 277489 XT-PIC ide2
> 11: 11465050 XT-PIC ide4, ide5, eth0, eth1, eth2, eth3
> 12: 58 XT-PIC i8042
> 14: 307536 XT-PIC ide0
> 15: 53 XT-PIC ide1
> NMI: 0
> LOC: 65007290
> ERR: 0
> MIS: 0
>
Yep, IRQ 11 is a bit crowded...

I was just about to ask a similar question...
How do I have a better interrupt table (no or less shared intrerupts) with ACPI?

My system (just rebooted) says:
$ cat /proc/interrupts
CPU0
0: 1434691 IO-APIC-edge timer
1: 5158 IO-APIC-edge i8042
8: 2 IO-APIC-edge rtc
9: 0 IO-APIC-level acpi
14: 8097 IO-APIC-edge ide0
15: 959 IO-APIC-edge ide1
19: 105118 IO-APIC-level nvidia
20: 17455 IO-APIC-level ehci_hcd, eth0, NVidia nForce2
21: 0 IO-APIC-level ohci_hcd
22: 16156 IO-APIC-level ohci_hcd
NMI: 0
LOC: 1434624
ERR: 0
MIS: 0

The "problem" here might be IRQ 20 when I am using my scanner@4800dpi (USB2.0, Epson GT-X700) writing the output via NFS (through eth0). Will test the numbers some other time.

Kalin.


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