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SubjectRe: how to balance interrupts between 2 CPUs?
From
Date
That is wierd you should have 4 CPU's. However I remember that Alan made
a patch for hyperthreading I *belive* is not in any 2.4.7 kernel.

I've a dual P4 Xeon 1.8Ghz with Intel chipset and 2.4.18smp, and I've:

te gcle1 ~ 4> cat /proc/interrupts
CPU0 CPU1 CPU2 CPU3
0: 117524 117823 117105 117564 IO-APIC-edge timer
1: 108 105 109 109 IO-APIC-edge
keyboard
2: 0 0 0 0 XT-PIC
cascade
4: 96 119 92 116 IO-APIC-edge serial
8: 1 0 0 0 IO-APIC-edge rtc
9: 0 0 0 0 IO-APIC-edge acpi
15: 2 1 1 0 IO-APIC-edge ide1
16: 0 0 0 0 IO-APIC-level
usb-uhci
17: 1554 1572 1499 1622 IO-APIC-level eth0
18: 0 0 0 0 IO-APIC-level
usb-uhci
19: 0 0 0 0 IO-APIC-level
usb-uhci
28: 4937 4915 4881 5053 IO-APIC-level
aic7xxx
29: 4 4 4 4 IO-APIC-level
aic7xxx
NMI: 0 0 0 0 te gcle1 ~ 4> cat
/proc/interrupts
CPU0 CPU1 CPU2 CPU3
0: 117524 117823 117105 117564 IO-APIC-edge timer
1: 108 105 109 109 IO-APIC-edge
keyboard
2: 0 0 0 0 XT-PIC
cascade
4: 96 119 92 116 IO-APIC-edge serial
8: 1 0 0 0 IO-APIC-edge rtc
9: 0 0 0 0 IO-APIC-edge acpi
15: 2 1 1 0 IO-APIC-edge ide1
16: 0 0 0 0 IO-APIC-level
usb-uhci
17: 1554 1572 1499 1622 IO-APIC-level eth0
18: 0 0 0 0 IO-APIC-level
usb-uhci
19: 0 0 0 0 IO-APIC-level
usb-uhci
28: 4937 4915 4881 5053 IO-APIC-level
aic7xxx
29: 4 4 4 4 IO-APIC-level
aic7xxx
NMI: 0 0 0 0
LOC: 469377 469403 469435 469433
PMC: 0 0 0 0
ERR: 0
MIS: 0
te gcle1 ~ 5>

LOC: 469377 469403 469435 469433
PMC: 0 0 0 0
ERR: 0
MIS: 0
te gcle1 ~ 5>


On Wed, 2002-04-10 at 14:23, zxj@water.pku.edu.cn wrote:
> Hello
>
> I am using two Intel Giga NICs in a DELL PowerEdge 4600
> with 2 Intel XEON 1.8GHz CPUs.
> The matherboard is ServerWorks GC-HE.
> The OS is RedHat 7.2, and the release of kernel is "2.4.7-10smp".
>
> The CPU0 has very heavy interrupt traffic,
> you can see the following information:
> >>>>>
> [root@giga root]# cat /proc/interrupts
> CPU0 CPU1
> 0: 395117 0 IO-APIC-edge timer
> 1: 653 0 IO-APIC-edge keyboard
> 2: 0 0 XT-PIC cascade
> 8: 1 0 IO-APIC-edge rtc
> 12: 23 0 IO-APIC-edge PS/2 Mouse
> 14: 2 0 IO-APIC-edge ide0
> 18: 30 0 IO-APIC-level aic7xxx
> 19: 86013 0 IO-APIC-level eth0
> 20: 10394 0 IO-APIC-level aic7xxx
> 21: 30 0 IO-APIC-level aic7xxx
> 27: 5480873 0 IO-APIC-level e1000
> 39: 164889152 0 IO-APIC-level e1000
> NMI: 0 0
> LOC: 395013 395012
> ERR: 0
> MIS: 0
> >>>>>
>
> The kernel's SMP option is enable, but the CPU1 is always idle.
> How to balance the interrpupts between two CPUs?
> If you are convenient, please give me some advice quickly.
>
> Thank you!
>
> Best regard
>
>
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--
_________________________________________________________________________

Terje Eggestad mailto:terje.eggestad@scali.no
Scali Scalable Linux Systems http://www.scali.com

Olaf Helsets Vei 6 tel: +47 22 62 89 61 (OFFICE)
P.O.Box 150, Oppsal +47 975 31 574 (MOBILE)
N-0619 Oslo fax: +47 22 62 89 51
NORWAY
_________________________________________________________________________

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