netdev - Re: how to distribute irqs of ixgbevf

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Date:	Thu, 25 Aug 2011 19:19:13 +0900
From:	"J.Hwan Kim" <frog1120@...il.com>
To:	netdev <netdev@...r.kernel.org>
Subject: Re: how to distribute irqs of ixgbevf

On 2011년 08월 25일 17:21, Eric Dumazet wrote:
> Le jeudi 25 août 2011 à 17:07 +0900, J.Hwan Kim a écrit :
>> Hi, everyone
>>
>> The interrupts of my ixgbevf driver occurs only Core 0
>> although the user space "irqbalance" serivce is working.
>>
>> How can I distribute the interrupt of RX in ixgbevf to all cores?
>>
>> cat /proc/interrupts | grep "isv"
>>     97:          8          0          0          0          0
>> 0          0          0   PCI-MSI-edge      isv0-rx-0
>>     99:          7          0          0          0          0
>> 0          0          0   PCI-MSI-edge      isv0:lsc
>>    103:       2059      0          0          0          0
>> 0          0          0   PCI-MSI-edge      isv2-rx-0
>>    104:         14        0          0          0          0
>> 0          0          0   PCI-MSI-edge      isv2-tx-0
>>    105:          1         0          0          0          0
>> 0          0          0   PCI-MSI-edge      isv2:mbx
>>
>> "isv" is netdevice name of my ixgbevf.
>>
>>
> Given load is very small, irqbalance chose to send interrupts on a
> single cpu.

This is CPU load measured by "top" and my cores are 8.


   PID USER      PR  NI  VIRT  RES  SHR    S     %CPU      %MEM     
TIME+      COMMAND
     3 root         20   0     0     0    0        R       99           
0.0     70:05.48    ksoftirqd/0

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