how to bind single interface with more than one cpu

Benjamin benjo11111 at
Wed Oct 19 17:55:44 UTC 2011


I found that for irq distribution across multiple cpus CONFIG_IRQBALANCE 
must enabled in i tried to check in my existing kernel but i m 
not getting it in config- so i downloaded 3.0.4 but when i m 
going to compile it , i try to find irqbalance optionn in menuconfig. 
But not getting such  option.

So please tell me from which option or module , i will be having 
irqbalance enabled in my kernel.?

>  Hi,
> I tried to change value in interface interrupt's smp_afinity value
> as per my understanding , smp_afinity values
> 1 for cpu0
> 2 for cpu1
> 4 for cpu2
>  8 for cpu3
>  that way cpu0+cpu1 = 1 + 2 = 3
> so i set different values for test .but each time it only binds with 
> single cpu from cpu0 / cpu1 / cpu2 or cpu3.
> i also start cpuspeed service and irqbalance --oneshot.
> But same result.i am not able to use  more than 1 cpu for single 
> interface.
> Regards,
> Benjo
>> On 10/19/2011 11:15 AM, Benjamin wrote:
>>>     Hi,
>>> I am using fedora 15 for application server.That applicaton is very
>>> loaded in network and we have good h/w which having 4 core cpu and
>>> currently 1 lan interface are using.So now i want to bind that 
>>> interface
>>> with more than one cpu to gain more performance and more throughput.
>>> I tried to do it by smp_afinity, but i can't. so i need advice and 
>>> help.
>>> Is there anything required from kernel side.? any parameter or any 
>>> thing
>>> which need to enable in kernel.?
>> When you say you tried to do it by smp_afinity, what exactly did you do?
>> Mike

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