Re: ACPI vs. APM - Which is better for desktop and why?

[Kalin KOZHUHAROV]

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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