El Wed, 24 Mar 2010 18:11:36 -0700
James Lamanna <jlamanna@xxxxxxxxx> escribiÃ:
Hi,
I have a Dual Xeon (single core each w/HT) machine and I noticed the
other day that interrupts are not
being balanced across the 2 processors:
CPU0 CPU1 CPU2 CPU3
0: 306 0 0 3254413993 IO-APIC-edge timer
1: 0 0 0 13468 IO-APIC-edge i8042
8: 0 0 0 3 IO-APIC-edge rtc
9: 0 0 0 0 IO-APIC-level acpi
12: 0 0 0 4 IO-APIC-edge i8042
169: 0 0 0 0 IO-APIC-level uhci_hcd:usb2
177: 0 0 0 16743166 IO-APIC-level ata_piix
185: 0 0 0 1 IO-APIC-level ehci_hcd:usb1
193: 0 0 0 0 IO-APIC-level uhci_hcd:usb3
201: 0 0 0 1867922172 IO-APIC-level eth0
209: 0 0 0 3254690559 IO-APIC-level wct4xxp
NMI: 1 0 0 0
LOC: 3255261535 3255261540 3255261549 3255220504
ERR: 0
MIS: 0
However the cpu_affinity of say, wct4xxp is:
# cat /proc/irq/209/smp_affinity
0000000f
Maybe you just need to run irqbalance http://www.irqbalance.org/
 sudo aptitude install irqbalance  in Debian system
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