[openib-general] IPoIB Question

[Sean Hubbell]

Greg Lindahl wrote:
> On Mon, Oct 23, 2006 at 07:53:06AM -0500, Hubbell, Sean C Contractor/Decibel wrote:
>
>   
>>   I currently have several applications that uses a legacy IPv4 protocol
>> and I use IPoIB to utilize my infiniband network which works great. I
>> have completed some timing and throughput analysis and noticed that I do
>> not get very much more if I use an infiniband network interface than
>> using my GigE network interface.
>>     
>
> You might want to note that different InfinBand implementations have
> quite different performance of IPoIB, especially for UDP.
>
> Another issue is that IPoIB has quite different performance with
> different Linux kernels. This is especially evident for TCP, although
> you can use SDP to accelerate TCP sockets and avoid this issue.
>
>   
We are currently looking at the new tickless kernel. Do you have one 
that you recommend?

Sean