Public bug reported:
The irqbalance daemon classifies network interfaces with non-eth* names
as class "other" instead of class "network". In particular, this affects
any machine with biosdevname enabled (NICs named em* and p*p*).
I have verified this in Precise beta 2. I run "irqbalance --debug" and
grep for the interrupt using "grep em1 /proc/interrupts". grep shows:
79: 2397 2660 0 0 0 0
0 0 0 0 0 0 0 0
0 0 IR-PCI-MSI-edge em1-0
80: 180 181 0 0 0 0
0 0 0 0 0 0 0 0
0 0 IR-PCI-MSI-edge em1-1
81: 250 1 0 0 0 0
0 0 0 0 0 0 0 0
0 0 IR-PCI-MSI-edge em1-2
82: 249 0 0 0 0 0
0 0 0 0 0 0 0 0
0 0 IR-PCI-MSI-edge em1-3
83: 182 3 0 0 0 0
0 0 0 0 0 0 0 0
0 0 IR-PCI-MSI-edge em1-4
84: 449 1595 0 0 0 0
0 0 0 0 0 0 0 0
0 0 IR-PCI-MSI-edge em1-5
85: 343 1319 0 0 0 0
0 0 0 0 0 0 0 0
0 0 IR-PCI-MSI-edge em1-6
86: 26 14 0 0 0 0
0 0 0 0 0 0 0 0
0 0 IR-PCI-MSI-edge em1-7
irqbalance --debug shows:
Interrupt 84 (class other) has workload 2
Interrupt 80 (class other) has workload 1
Interrupt 86 (class other) has workload 0
Interrupt 85 (class other) has workload 0
Interrupt 83 (class other) has workload 0
Interrupt 82 (class other) has workload 0
Interrupt 81 (class other) has workload 0
Interrupt 79 (class other) has workload 0
The issue is resolved in the latest upstream of irqbalance using the following
patch (commit from September 2011):
http://code.google.com/p/irqbalance/source/detail?r=32a7757a031445a48be70e0e815e710b5c54c88e
** Affects: irqbalance (Ubuntu)
Importance: Undecided
Status: New
** Tags: biosdevname
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Server Team, which is subscribed to irqbalance in Ubuntu.
https://bugs.launchpad.net/bugs/974450
Title:
irqbalance classifies network interfaces with custom/renamed
interfaces as class other
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https://bugs.launchpad.net/ubuntu/+source/irqbalance/+bug/974450/+subscriptions
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