CODEWITHSUNDEEP
clinux
dimba
dimba

Reputation: 27621

Retrieving irq number of a NIC

I need to retrieve an interrupt number of interface by its' name as appears in ifconfig.

Is there some standard API to do it?

Upvotes: 4

Views: 3933

Answers (2)

Govindarajulu Varadarajan
Govindarajulu Varadarajan

Reputation: 21

/sys/class/net/[ethname]/device/irq should legacy irq number, device may not be using legacy irq, it may be using msix.

check 

$ ls /sys/class/net/eth0/device/msi_irqs/

or

$ grep eth0 /proc/interrupts

Upvotes: 2

Adrian Cox
Adrian Cox

Reputation: 6334

The interrupt number lives in sysfs. Look for the file /sys/class/net/[ethname]/device/irq. For example:

more /sys/class/net/*/device/irq
::::::::::::::
/sys/class/net/eth0/device/irq
::::::::::::::
30
::::::::::::::
/sys/class/net/eth1/device/irq
::::::::::::::
29

Upvotes: 3

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