Re: IO-APIC on nforce2
From: Christian Kröner
Date: Tue Apr 13 2004 - 12:21:16 EST
Here is some other (maybe useful) info I can give:
This is part of my system log from kernel 2.6.5-mm4 (no other patches than -mm).
The irq0 gets set to XT-PIC with this kernel version...
timer setup:
ENABLING IO-APIC IRQs
init IO_APIC IRQs
IO-APIC (apicid-pin) 2-0, 2-16, 2-17, 2-18, 2-19, 2-20, 2-21, 2-22, 2-23 not connected.
..TIMER: vector=0x31 pin1=2 pin2=-1
..MP-BIOS bug: 8254 timer not connected to IO-APIC
...trying to set up timer (IRQ0) through the 8259A ... failed.
...trying to set up timer as Virtual Wire IRQ... failed.
...trying to set up timer as ExtINT IRQ... works.
Using local APIC timer interrupts.
interrupt routing:
number of MP IRQ sources: 15.
number of IO-APIC #2 registers: 24.
testing the IO APIC.......................
IO APIC #2......
.... register #00: 02000000
....... : physical APIC id: 02
....... : Delivery Type: 0
....... : LTS : 0
.... register #01: 00170011
....... : max redirection entries: 0017
....... : PRQ implemented: 0
....... : IO APIC version: 0011
.... register #02: 00000000
....... : arbitration: 00
.... IRQ redirection table:
NR Log Phy Mask Trig IRR Pol Stat Dest Deli Vect:
00 000 00 1 0 0 0 0 0 0 00
01 001 01 0 0 0 0 0 1 1 39
02 000 00 1 0 0 0 0 0 0 00
03 001 01 0 0 0 0 0 1 1 41
04 001 01 0 0 0 0 0 1 1 49
05 001 01 0 0 0 0 0 1 1 51
06 001 01 0 0 0 0 0 1 1 59
07 001 01 1 0 0 0 0 1 1 61
08 001 01 0 0 0 0 0 1 1 69
09 001 01 0 1 0 0 0 1 1 71
0a 001 01 0 0 0 0 0 1 1 79
0b 001 01 0 0 0 0 0 1 1 81
0c 001 01 0 0 0 0 0 1 1 89
0d 001 01 0 0 0 0 0 1 1 91
0e 001 01 0 0 0 0 0 1 1 99
0f 001 01 0 0 0 0 0 1 1 A1
10 001 01 1 1 0 0 0 1 1 D1
11 001 01 1 1 0 0 0 1 1 D9
12 001 01 1 1 0 0 0 1 1 E1
13 001 01 1 1 0 0 0 1 1 C9
14 001 01 1 1 0 0 0 1 1 B1
15 001 01 1 1 0 0 0 1 1 C1
16 001 01 1 1 0 0 0 1 1 B9
17 001 01 1 1 0 0 0 1 1 A9
Now, with 2.6.5-mm5-1, patched by hand with the io_apic.c-patch I got from Ross
(removing the declaration of extern int timer_ack in check_timer(), changing nothing else),
I get the following:
timer setup:
ENABLING IO-APIC IRQs
init IO_APIC IRQs
IO-APIC (apicid-pin) 2-0, 2-16, 2-17, 2-18, 2-19, 2-20, 2-21, 2-22, 2-23 not connected.
..TIMER: vector=0x31 pin1=2 pin2=-1
..MP-BIOS bug: 8254 timer not connected to IO-APIC INTIN2
..TIMER: Check if 8254 timer connected to IO-APIC INTIN0? ...
..TIMER: works OK on IO-APIC irq0
Using local APIC timer interrupts.
irq routing:
number of MP IRQ sources: 15.
number of IO-APIC #2 registers: 24.
testing the IO APIC.......................
IO APIC #2......
.... register #00: 02000000
....... : physical APIC id: 02
....... : Delivery Type: 0
....... : LTS : 0
.... register #01: 00170011
....... : max redirection entries: 0017
....... : PRQ implemented: 0
....... : IO APIC version: 0011
.... register #02: 00000000
....... : arbitration: 00
.... IRQ redirection table:
NR Log Phy Mask Trig IRR Pol Stat Dest Deli Vect:
00 001 01 0 0 0 0 0 1 1 31
01 001 01 0 0 0 0 0 1 1 39
02 000 00 1 0 0 0 0 0 0 00
03 001 01 0 0 0 0 0 1 1 41
04 001 01 0 0 0 0 0 1 1 49
05 001 01 0 0 0 0 0 1 1 51
06 001 01 0 0 0 0 0 1 1 59
07 001 01 0 0 0 0 0 1 1 61
08 001 01 0 0 0 0 0 1 1 69
09 001 01 0 1 0 0 0 1 1 71
0a 001 01 0 0 0 0 0 1 1 79
0b 001 01 0 0 0 0 0 1 1 81
0c 001 01 0 0 0 0 0 1 1 89
0d 001 01 0 0 0 0 0 1 1 91
0e 001 01 0 0 0 0 0 1 1 99
0f 001 01 0 0 0 0 0 1 1 A1
10 001 01 1 1 0 0 0 1 1 D1
11 001 01 1 1 0 0 0 1 1 D9
12 001 01 1 1 0 0 0 1 1 E1
13 001 01 1 1 0 0 0 1 1 C9
14 001 01 1 1 0 0 0 1 1 B1
15 001 01 1 1 0 0 0 1 1 C1
16 001 01 1 1 0 0 0 1 1 B9
17 001 01 1 1 0 0 0 1 1 A9
IRQ to pin mappings:
IRQ0 -> 0:0
IRQ1 -> 0:1
IRQ3 -> 0:3
IRQ4 -> 0:4
IRQ5 -> 0:5
IRQ6 -> 0:6
IRQ7 -> 0:7
IRQ8 -> 0:8
IRQ9 -> 0:9
IRQ10 -> 0:10
IRQ11 -> 0:11
IRQ12 -> 0:12
IRQ13 -> 0:13
IRQ14 -> 0:14
IRQ15 -> 0:15
IRQ16 -> 0:16
IRQ17 -> 0:17
IRQ18 -> 0:18
IRQ19 -> 0:19
IRQ20 -> 0:20
IRQ21 -> 0:21
IRQ22 -> 0:22
IRQ23 -> 0:23
.................................... done.
cat /proc/interrupts gets me:
CPU0
0: 568313 IO-APIC-edge timer
1: 1359 IO-APIC-edge i8042
2: 0 XT-PIC cascade
7: 0 IO-APIC-edge parport0
8: 4 IO-APIC-edge rtc
9: 0 IO-APIC-level acpi
12: 14859 IO-APIC-edge i8042
14: 17983 IO-APIC-edge ide0
15: 92 IO-APIC-edge ide1
16: 2335 IO-APIC-level ide2, saa7134[0]
17: 142 IO-APIC-level CMI8738
19: 31779 IO-APIC-level nvidia
20: 72619 IO-APIC-level ohci_hcd, eth0
21: 86626041 IO-APIC-level ehci_hcd
22: 78 IO-APIC-level ohci_hcd
NMI: 0
LOC: 566374
ERR: 0
MIS: 0
There is NO constant hi-load anymore, cool!
thanks, christian.
P.S: Ross, could you send a patch that could be applied using the patch-utility?
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