Re: SMP broken on Dell PowerEdge 4100/200 under 2.6.0-testxx?

Ethan Weinstein
2003-12-06T20:05:47Z

Colin Coe wrote:
> Sorry about the delay.
>
> Booted with noirqbalance.
>
> [root@host root]# cat /proc/interrupts
> CPU0 CPU1
> 0: 7411777 5971987 IO-APIC-edge timer
> 1: 7 4 IO-APIC-edge i8042
> 2: 0 0 XT-PIC cascade
> 4: 16 42 IO-APIC-edge serial
> 5: 4915 4820 IO-APIC-level eth1
> 10: 67 69 IO-APIC-level aic7xxx
> 11: 325 266 IO-APIC-level eth0
> 12: 47 109 IO-APIC-edge i8042
> 14: 0 0 IO-APIC-level CS46XX
> 15: 6398 6401 IO-APIC-level megaraid
> NMI: 0 0
> LOC: 13383659 13383658
> ERR: 0
> MIS: 0
>
> That looks a lot better...
>
> Thanks!
>
> --
> "Obnoxious frog..." Spike, 2071AD
>
> William Lee Irwin III said:
>
>>On Sat, Dec 06, 2003 at 01:48:54PM +1100, Nick Piggin wrote:
>>
>>>Although in this case Colin has 2 PPro 200s.
>>>Colin - process load should be evenly distributed between CPUs, and this
>>>is generally the most important thing. Big networking loads (most
>>>commonly)
>>>can put a lot of time into processing interrupts though.
>>
>>That is rather busted, then.
>>
>>Colin, could you try booting with noirqbalance on the kernel command
>>line?
>>
>>
>>-- wli
>>
>

I'll throw my hat in here as well. This is an old compaq proliant I
have at the office- dual 400 PII, booted with "noirqbalance" 2.6.0-test11:

CPU0 CPU1
0: 2580383 1920931 IO-APIC-edge timer
1: 6 3 IO-APIC-edge i8042
2: 0 0 XT-PIC cascade
5: 467 423 IO-APIC-level TLAN
8: 1 0 IO-APIC-edge rtc
9: 15 15 IO-APIC-level sym53c8xx
10: 17 17 IO-APIC-level sym53c8xx
11: 1602 1593 IO-APIC-level ida0
14: 8 2 IO-APIC-edge ide0
NMI: 0 0
LOC: 4501366 4501354
ERR: 0
MIS: 0

witout "noirqbalance" we interrupt on CPU0 solely.

-E