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Date: Fri, 9 Jul 2010 15:59:15 -0700
From: Bryan Hundven <bryanhundven@...il.com>
To: mchehab@...hat.com
Cc: linux-kernel@...r.kernel.org
Subject: Re: Interrupt Affinity in SMP
Mauro, list,
(please CC me in replies, I am not on the lkml list).
I am having a similar issue as:
http://lkml.indiana.edu/hypermail/linux/kernel/1006.3/01811.html
which has no responses.
My company is using an evaluation of dual 5645 xeon board with the 5520 chipset.
Attached is my kernel config.
We have 12 82580 intel (igb) nics, and their affinity is set to
0xffffffff, but I see all interrupts happening on cpu0:
=====8<=====8<=====8<=====8<=====8<=====8<=====8<=====8<=====8<=====
root@(none):~# cat /proc/irq/85/smp_affinity
ffffff
root@(none):~# cat /proc/irq/86/smp_affinity
ffffff
root@(none):~# cat /proc/irq/87/smp_affinity
ffffff
=====8<=====8<=====8<=====8<=====8<=====8<=====8<=====8<=====8<=====
=====8<=====8<=====8<=====8<=====8<=====8<=====8<=====8<=====8<=====
root@(none):~# cat /proc/interrupts
CPU0 CPU1 CPU2 CPU3 CPU4
CPU5 CPU6 CPU7 CPU8 CPU9 CPU10
CPU11 CPU12 CPU13 CPU14 CPU15 CPU16
CPU17 CPU18 CPU19 CPU20 CPU21 CPU22
CPU23
0: 70 0 0 0 0
0 0 0 0 0 0 0
0 0 0 0 0 0
0 0 0 0 0 0
IO-APIC-edge timer
1: 3 0 0 0 0
0 0 0 0 0 0 0
0 0 0 0 0 0
0 0 0 0 0 0
IO-APIC-edge i8042
4: 4282 0 0 0 0
0 0 0 0 0 0 0
0 0 0 0 0 0
0 0 0 0 0 0
IO-APIC-edge serial
8: 1 0 0 0 0
0 0 0 0 0 0 0
0 0 0 0 0 0
0 0 0 0 0 0
IO-APIC-edge rtc0
9: 0 0 0 0 0
0 0 0 0 0 0 0
0 0 0 0 0 0
0 0 0 0 0 0
IO-APIC-fasteoi acpi
12: 3 0 0 0 0
0 0 0 0 0 0 0
0 0 0 0 0 0
0 0 0 0 0 0
IO-APIC-edge i8042
14: 0 0 0 0 0
0 0 0 0 0 0 0
0 0 0 0 0 0
0 0 0 0 0 0
IO-APIC-edge ata_piix
15: 0 0 0 0 0
0 0 0 0 0 0 0
0 0 0 0 0 0
0 0 0 0 0 0
IO-APIC-edge ata_piix
16: 438 0 0 0 0
0 0 0 0 0 0 0
0 0 0 0 0 0
0 0 0 0 0 0
IO-APIC-fasteoi pata_it8213
18: 0 0 0 0 0
0 0 0 0 0 0 0
0 0 0 0 0 0
0 0 0 0 0 0
IO-APIC-fasteoi uhci_hcd:usb4
19: 0 0 0 0 0
0 0 0 0 0 0 0
0 0 0 0 0 0
0 0 0 0 0 0
IO-APIC-fasteoi ata_piix, uhci_hcd:usb3
23: 26 0 0 0 0
0 0 0 0 0 0 0
0 0 0 0 0 0
0 0 0 0 0 0
IO-APIC-fasteoi ehci_hcd:usb1, uhci_hcd:usb2
64: 0 0 0 0 0
0 0 0 0 0 0 0
0 0 0 0 0 0
0 0 0 0 0 0
PCI-MSI-edge aerdrv
65: 0 0 0 0 0
0 0 0 0 0 0 0
0 0 0 0 0 0
0 0 0 0 0 0
PCI-MSI-edge aerdrv
66: 0 0 0 0 0
0 0 0 0 0 0 0
0 0 0 0 0 0
0 0 0 0 0 0
PCI-MSI-edge aerdrv
67: 0 0 0 0 0
0 0 0 0 0 0 0
0 0 0 0 0 0
0 0 0 0 0 0
PCI-MSI-edge aerdrv
68: 0 0 0 0 0
0 0 0 0 0 0 0
0 0 0 0 0 0
0 0 0 0 0 0
PCI-MSI-edge aerdrv
69: 0 0 0 0 0
0 0 0 0 0 0 0
0 0 0 0 0 0
0 0 0 0 0 0
PCI-MSI-edge aerdrv
70: 0 0 0 0 0
0 0 0 0 0 0 0
0 0 0 0 0 0
0 0 0 0 0 0
PCI-MSI-edge aerdrv
71: 0 0 0 0 0
0 0 0 0 0 0 0
0 0 0 0 0 0
0 0 0 0 0 0
PCI-MSI-edge aerdrv
72: 0 0 0 0 0
0 0 0 0 0 0 0
0 0 0 0 0 0
0 0 0 0 0 0
PCI-MSI-edge aerdrv
73: 0 0 0 0 0
0 0 0 0 0 0 0
0 0 0 0 0 0
0 0 0 0 0 0
PCI-MSI-edge aerdrv
76: 3 0 0 0 0
0 0 0 0 0 0 0
0 0 0 0 0 0
0 0 0 0 0 0
PCI-MSI-edge ioat-msix
77: 3 0 0 0 0
0 0 0 0 0 0 0
0 0 0 0 0 0
0 0 0 0 0 0
PCI-MSI-edge ioat-msix
78: 3 0 0 0 0
0 0 0 0 0 0 0
0 0 0 0 0 0
0 0 0 0 0 0
PCI-MSI-edge ioat-msix
79: 3 0 0 0 0
0 0 0 0 0 0 0
0 0 0 0 0 0
0 0 0 0 0 0
PCI-MSI-edge ioat-msix
80: 3 0 0 0 0
0 0 0 0 0 0 0
0 0 0 0 0 0
0 0 0 0 0 0
PCI-MSI-edge ioat-msix
81: 3 0 0 0 0
0 0 0 0 0 0 0
0 0 0 0 0 0
0 0 0 0 0 0
PCI-MSI-edge ioat-msix
82: 3 0 0 0 0
0 0 0 0 0 0 0
0 0 0 0 0 0
0 0 0 0 0 0
PCI-MSI-edge ioat-msix
83: 3 0 0 0 0
0 0 0 0 0 0 0
0 0 0 0 0 0
0 0 0 0 0 0
PCI-MSI-edge ioat-msix
84: 0 0 0 0 0
0 0 0 0 0 0 0
0 0 0 0 0 0
0 0 0 0 0 0
PCI-MSI-edge pkp_dev
85: 1 0 0 0 0
0 0 0 0 0 0 0
0 0 0 0 0 0
0 0 0 0 0 0
PCI-MSI-edge eth0
86: 47 0 0 0 0
0 0 0 0 0 0 0
0 0 0 0 0 0
0 0 0 0 0 0
PCI-MSI-edge eth0-TxRx-0
87: 47 0 0 0 0
0 0 0 0 0 0 0
0 0 0 0 0 0
0 0 0 0 0 0
PCI-MSI-edge eth0-TxRx-1
88: 47 0 0 0 0
0 0 0 0 0 0 0
0 0 0 0 0 0
0 0 0 0 0 0
PCI-MSI-edge eth0-TxRx-2
89: 47 0 0 0 0
0 0 0 0 0 0 0
0 0 0 0 0 0
0 0 0 0 0 0
PCI-MSI-edge eth0-TxRx-3
90: 47 0 0 0 0
0 0 0 0 0 0 0
0 0 0 0 0 0
0 0 0 0 0 0
PCI-MSI-edge eth0-TxRx-4
91: 47 0 0 0 0
0 0 0 0 0 0 0
0 0 0 0 0 0
0 0 0 0 0 0
PCI-MSI-edge eth0-TxRx-5
92: 47 0 0 0 0
0 0 0 0 0 0 0
0 0 0 0 0 0
0 0 0 0 0 0
PCI-MSI-edge eth0-TxRx-6
93: 47 0 0 0 0
0 0 0 0 0 0 0
0 0 0 0 0 0
0 0 0 0 0 0
PCI-MSI-edge eth0-TxRx-7
94: 1 0 0 0 0
0 0 0 0 0 0 0
0 0 0 0 0 0
0 0 0 0 0 0
PCI-MSI-edge eth1
95: 47 0 0 0 0
0 0 0 0 0 0 0
0 0 0 0 0 0
0 0 0 0 0 0
PCI-MSI-edge eth1-TxRx-0
96: 47 0 0 0 0
0 0 0 0 0 0 0
0 0 0 0 0 0
0 0 0 0 0 0
PCI-MSI-edge eth1-TxRx-1
97: 47 0 0 0 0
0 0 0 0 0 0 0
0 0 0 0 0 0
0 0 0 0 0 0
PCI-MSI-edge eth1-TxRx-2
98: 47 0 0 0 0
0 0 0 0 0 0 0
0 0 0 0 0 0
0 0 0 0 0 0
PCI-MSI-edge eth1-TxRx-3
99: 47 0 0 0 0
0 0 0 0 0 0 0
0 0 0 0 0 0
0 0 0 0 0 0
PCI-MSI-edge eth1-TxRx-4
100: 47 0 0 0 0
0 0 0 0 0 0 0
0 0 0 0 0 0
0 0 0 0 0 0
PCI-MSI-edge eth1-TxRx-5
101: 47 0 0 0 0
0 0 0 0 0 0 0
0 0 0 0 0 0
0 0 0 0 0 0
PCI-MSI-edge eth1-TxRx-6
102: 47 0 0 0 0
0 0 0 0 0 0 0
0 0 0 0 0 0
0 0 0 0 0 0
PCI-MSI-edge eth1-TxRx-7
103: 1 0 0 0 0
0 0 0 0 0 0 0
0 0 0 0 0 0
0 0 0 0 0 0
PCI-MSI-edge eth2
104: 46 0 0 0 0
0 0 0 0 0 0 0
0 0 0 0 0 0
0 0 0 0 0 0
PCI-MSI-edge eth2-TxRx-0
105: 46 0 0 0 0
0 0 0 0 0 0 0
0 0 0 0 0 0
0 0 0 0 0 0
PCI-MSI-edge eth2-TxRx-1
106: 46 0 0 0 0
0 0 0 0 0 0 0
0 0 0 0 0 0
0 0 0 0 0 0
PCI-MSI-edge eth2-TxRx-2
107: 46 0 0 0 0
0 0 0 0 0 0 0
0 0 0 0 0 0
0 0 0 0 0 0
PCI-MSI-edge eth2-TxRx-3
108: 46 0 0 0 0
0 0 0 0 0 0 0
0 0 0 0 0 0
0 0 0 0 0 0
PCI-MSI-edge eth2-TxRx-4
109: 46 0 0 0 0
0 0 0 0 0 0 0
0 0 0 0 0 0
0 0 0 0 0 0
PCI-MSI-edge eth2-TxRx-5
110: 46 0 0 0 0
0 0 0 0 0 0 0
0 0 0 0 0 0
0 0 0 0 0 0
PCI-MSI-edge eth2-TxRx-6
111: 46 0 0 0 0
0 0 0 0 0 0 0
0 0 0 0 0 0
0 0 0 0 0 0
PCI-MSI-edge eth2-TxRx-7
112: 1 0 0 0 0
0 0 0 0 0 0 0
0 0 0 0 0 0
0 0 0 0 0 0
PCI-MSI-edge eth3
113: 46 0 0 0 0
0 0 0 0 0 0 0
0 0 0 0 0 0
0 0 0 0 0 0
PCI-MSI-edge eth3-TxRx-0
114: 46 0 0 0 0
0 0 0 0 0 0 0
0 0 0 0 0 0
0 0 0 0 0 0
PCI-MSI-edge eth3-TxRx-1
115: 46 0 0 0 0
0 0 0 0 0 0 0
0 0 0 0 0 0
0 0 0 0 0 0
PCI-MSI-edge eth3-TxRx-2
116: 46 0 0 0 0
0 0 0 0 0 0 0
0 0 0 0 0 0
0 0 0 0 0 0
PCI-MSI-edge eth3-TxRx-3
117: 46 0 0 0 0
0 0 0 0 0 0 0
0 0 0 0 0 0
0 0 0 0 0 0
PCI-MSI-edge eth3-TxRx-4
118: 46 0 0 0 0
0 0 0 0 0 0 0
0 0 0 0 0 0
0 0 0 0 0 0
PCI-MSI-edge eth3-TxRx-5
119: 46 0 0 0 0
0 0 0 0 0 0 0
0 0 0 0 0 0
0 0 0 0 0 0
PCI-MSI-edge eth3-TxRx-6
120: 46 0 0 0 0
0 0 0 0 0 0 0
0 0 0 0 0 0
0 0 0 0 0 0
PCI-MSI-edge eth3-TxRx-7
121: 1 0 0 0 0
0 0 0 0 0 0 0
0 0 0 0 0 0
0 0 0 0 0 0
PCI-MSI-edge eth4
122: 46 0 0 0 0
0 0 0 0 0 0 0
0 0 0 0 0 0
0 0 0 0 0 0
PCI-MSI-edge eth4-TxRx-0
123: 46 0 0 0 0
0 0 0 0 0 0 0
0 0 0 0 0 0
0 0 0 0 0 0
PCI-MSI-edge eth4-TxRx-1
124: 46 0 0 0 0
0 0 0 0 0 0 0
0 0 0 0 0 0
0 0 0 0 0 0
PCI-MSI-edge eth4-TxRx-2
125: 46 0 0 0 0
0 0 0 0 0 0 0
0 0 0 0 0 0
0 0 0 0 0 0
PCI-MSI-edge eth4-TxRx-3
126: 46 0 0 0 0
0 0 0 0 0 0 0
0 0 0 0 0 0
0 0 0 0 0 0
PCI-MSI-edge eth4-TxRx-4
127: 46 0 0 0 0
0 0 0 0 0 0 0
0 0 0 0 0 0
0 0 0 0 0 0
PCI-MSI-edge eth4-TxRx-5
128: 46 0 0 0 0
0 0 0 0 0 0 0
0 0 0 0 0 0
0 0 0 0 0 0
PCI-MSI-edge eth4-TxRx-6
129: 46 0 0 0 0
0 0 0 0 0 0 0
0 0 0 0 0 0
0 0 0 0 0 0
PCI-MSI-edge eth4-TxRx-7
130: 1 0 0 0 0
0 0 0 0 0 0 0
0 0 0 0 0 0
0 0 0 0 0 0
PCI-MSI-edge eth5
131: 46 0 0 0 0
0 0 0 0 0 0 0
0 0 0 0 0 0
0 0 0 0 0 0
PCI-MSI-edge eth5-TxRx-0
132: 46 0 0 0 0
0 0 0 0 0 0 0
0 0 0 0 0 0
0 0 0 0 0 0
PCI-MSI-edge eth5-TxRx-1
133: 46 0 0 0 0
0 0 0 0 0 0 0
0 0 0 0 0 0
0 0 0 0 0 0
PCI-MSI-edge eth5-TxRx-2
134: 46 0 0 0 0
0 0 0 0 0 0 0
0 0 0 0 0 0
0 0 0 0 0 0
PCI-MSI-edge eth5-TxRx-3
135: 46 0 0 0 0
0 0 0 0 0 0 0
0 0 0 0 0 0
0 0 0 0 0 0
PCI-MSI-edge eth5-TxRx-4
136: 46 0 0 0 0
0 0 0 0 0 0 0
0 0 0 0 0 0
0 0 0 0 0 0
PCI-MSI-edge eth5-TxRx-5
137: 46 0 0 0 0
0 0 0 0 0 0 0
0 0 0 0 0 0
0 0 0 0 0 0
PCI-MSI-edge eth5-TxRx-6
138: 46 0 0 0 0
0 0 0 0 0 0 0
0 0 0 0 0 0
0 0 0 0 0 0
PCI-MSI-edge eth5-TxRx-7
139: 1 0 0 0 0
0 0 0 0 0 0 0
0 0 0 0 0 0
0 0 0 0 0 0
PCI-MSI-edge eth6
140: 46 0 0 0 0
0 0 0 0 0 0 0
0 0 0 0 0 0
0 0 0 0 0 0
PCI-MSI-edge eth6-TxRx-0
141: 46 0 0 0 0
0 0 0 0 0 0 0
0 0 0 0 0 0
0 0 0 0 0 0
PCI-MSI-edge eth6-TxRx-1
142: 46 0 0 0 0
0 0 0 0 0 0 0
0 0 0 0 0 0
0 0 0 0 0 0
PCI-MSI-edge eth6-TxRx-2
143: 46 0 0 0 0
0 0 0 0 0 0 0
0 0 0 0 0 0
0 0 0 0 0 0
PCI-MSI-edge eth6-TxRx-3
144: 46 0 0 0 0
0 0 0 0 0 0 0
0 0 0 0 0 0
0 0 0 0 0 0
PCI-MSI-edge eth6-TxRx-4
145: 46 0 0 0 0
0 0 0 0 0 0 0
0 0 0 0 0 0
0 0 0 0 0 0
PCI-MSI-edge eth6-TxRx-5
146: 46 0 0 0 0
0 0 0 0 0 0 0
0 0 0 0 0 0
0 0 0 0 0 0
PCI-MSI-edge eth6-TxRx-6
147: 46 0 0 0 0
0 0 0 0 0 0 0
0 0 0 0 0 0
0 0 0 0 0 0
PCI-MSI-edge eth6-TxRx-7
148: 1 0 0 0 0
0 0 0 0 0 0 0
0 0 0 0 0 0
0 0 0 0 0 0
PCI-MSI-edge eth7
149: 46 0 0 0 0
0 0 0 0 0 0 0
0 0 0 0 0 0
0 0 0 0 0 0
PCI-MSI-edge eth7-TxRx-0
150: 46 0 0 0 0
0 0 0 0 0 0 0
0 0 0 0 0 0
0 0 0 0 0 0
PCI-MSI-edge eth7-TxRx-1
151: 46 0 0 0 0
0 0 0 0 0 0 0
0 0 0 0 0 0
0 0 0 0 0 0
PCI-MSI-edge eth7-TxRx-2
152: 46 0 0 0 0
0 0 0 0 0 0 0
0 0 0 0 0 0
0 0 0 0 0 0
PCI-MSI-edge eth7-TxRx-3
153: 46 0 0 0 0
0 0 0 0 0 0 0
0 0 0 0 0 0
0 0 0 0 0 0
PCI-MSI-edge eth7-TxRx-4
154: 46 0 0 0 0
0 0 0 0 0 0 0
0 0 0 0 0 0
0 0 0 0 0 0
PCI-MSI-edge eth7-TxRx-5
155: 46 0 0 0 0
0 0 0 0 0 0 0
0 0 0 0 0 0
0 0 0 0 0 0
PCI-MSI-edge eth7-TxRx-6
156: 46 0 0 0 0
0 0 0 0 0 0 0
0 0 0 0 0 0
0 0 0 0 0 0
PCI-MSI-edge eth7-TxRx-7
NMI: 0 0 0 0 0
0 0 0 0 0 0 0
0 0 0 0 0 0
0 0 0 0 0 0
Non-maskable interrupts
LOC: 45670 45920 45859 45793 45791
45755 45720 45685 45796 45615 45580
45545 45503 45474 45436 45405 45369
45334 45299 45264 45229 45194 45159
45106 Local timer interrupts
SPU: 0 0 0 0 0
0 0 0 0 0 0 0
0 0 0 0 0 0
0 0 0 0 0 0 Spurious
interrupts
PMI: 0 0 0 0 0
0 0 0 0 0 0 0
0 0 0 0 0 0
0 0 0 0 0 0
Performance monitoring interrupts
PND: 0 0 0 0 0
0 0 0 0 0 0 0
0 0 0 0 0 0
0 0 0 0 0 0
Performance pending work
RES: 109 2 1 3 0
1 0 1 0 1 0 1
8 1 47 1 0 1
0 1 0 1 0 8
Rescheduling interrupts
CAL: 5 316 132 130 128
126 124 122 120 118 116 114
112 110 108 106 104 102
100 98 96 94 92 86 Function
call interrupts
TLB: 13 6 4 0 1
0 0 0 0 0 0 0
24 0 13 28 1 0
0 0 0 0 0 0 TLB
shootdowns
TRM: 0 0 0 0 0
0 0 0 0 0 0 0
0 0 0 0 0 0
0 0 0 0 0 0 Thermal
event interrupts
THR: 0 0 0 0 0
0 0 0 0 0 0 0
0 0 0 0 0 0
0 0 0 0 0 0 Threshold
APIC interrupts
MCE: 0 0 0 0 0
0 0 0 0 0 0 0
0 0 0 0 0 0
0 0 0 0 0 0 Machine
check exceptions
MCP: 2 2 2 2 2
2 2 2 2 2 2 2
2 2 2 2 2 2
2 2 2 2 2 2 Machine
check polls
ERR: 0
MIS: 0
=====8<=====8<=====8<=====8<=====8<=====8<=====8<=====8<=====8<=====
I am happy testing patches, and running any unit-tests.
Thanks in advance,
-Bryan
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