What are the lines in /proc/interrupts referring to when they show an Ethernet device with an additional number across multiple lines in Red Hat Enterprise Linux 5.6

Solution Verified - Updated -

Issue

  • The same ethernet device shows multiple times in /proc/interrupts
  • The /proc/interrupt file shows the same ethernet device spread across multiple lines.  This is independant of VLAN, bonding or bridging.

For example:

 # cat proc/interrupts | grep eth0

    155:    2708302     0          0          0          0          0          0          0 PCI-MSI-X  eth0-0
    163:      38017     0          0          0          0          0          0          0 PCI-MSI-X  eth0-1
    171:     303680     0          0          0          0          0          0          0 PCI-MSI-X  eth0-2
    179:     291655     0          0          0          0          0          0          0 PCI-MSI-X  eth0-3
    187:      41740     0          0          0          0          0          0          0 PCI-MSI-X  eth0-4
    195:     198451     0          0          0          0          0          0          0 PCI-MSI-X  eth0-5
    203:       2384     0          0          0          0          0          0          0 PCI-MSI-X  eth0-6
    211:     276563     0          0          0          0          0          0          0 PCI-MSI-X  eth0-7

Environment

  • Red Hat Enterprise Linux 5.6 x86_64
  • Kernel module BNX2 driver loaded.
  • MSI-X capable motherboard.
  • MSI-X capable network interface card.

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