[openib-general] IPoIB Question

[Sean Hubbell]

Scott,

Thanks for the reply again. The third party api that we use leverages a 
combination of UDP and TCP socket conntections for speed. Is there 
something for UCP as well?

Sean

Scott Weitzenkamp (sweitzen) wrote:
> If you are using TCP, you can use SDP transparently via libsdp to get
> improved latency and throughput.
>
> Scott 
>
>   
>> -----Original Message-----
>> From: Sean Hubbell [mailto:shubbell at dbresearch.net] 
>> Sent: Monday, October 23, 2006 8:56 AM
>> To: Scott Weitzenkamp (sweitzen)
>> Cc: openib-general at openib.org
>> Subject: Re: [openib-general] IPoIB Question
>>
>> We currently have a non-homogeneous cluster so that seems that would 
>> possible explain a few of the differences that I have seen on 
>> some of my 
>> tests. I will look at netperf.org and see what they have to offer.
>>
>>   On another note, is there plans to have IPoIB support the full 
>> throughput that infiniband 4x or 12x has? Specifically, can I keep my 
>> legacy apps and just upgrade the network to take advantage of 
>> the bandwidth?
>>
>> Sean
>>
>> Scott Weitzenkamp (sweitzen) wrote:
>>     
>>> IPoIB performance will vary quite a bit depending on what 
>>>       
>> motherboard, 
>>     
>>> CPU speed, and HCA type you have.  What are the specs on 
>>>       
>> the systems 
>>     
>>> you are using?
>>>  
>>> Netperf (www.netperf.org <http://www.netperf.org>) is a 
>>>       
>> good tool to 
>>     
>>> measure IPoIB performance.
>>>  
>>> Scott Weitzenkamp
>>> SQA and Release Manager
>>> Server Virtualization Business Unit
>>> Cisco Systems
>>>  
>>>
>>>     
>>>       
>> --------------------------------------------------------------
>> ----------
>>     
>>>     *From:* openib-general-bounces at openib.org
>>>     [mailto:openib-general-bounces at openib.org] *On Behalf 
>>>       
>> Of *Hubbell,
>>     
>>>     Sean C Contractor/Decibel
>>>     *Sent:* Monday, October 23, 2006 5:53 AM
>>>     *To:* openib-general at openib.org
>>>     *Cc:* Sean Hubbell
>>>     *Subject:* [openib-general] IPoIB Question
>>>
>>>     Hello,
>>>
>>>       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.
>>     
>>>     My question is, am I using IPoIB correctly or are these the
>>>     typical numbers that everyone is seeing? Is there a standard
>>>     application that I may use to test my current configuration?
>>>
>>>     Thanks in advance,
>>>
>>>     Sean
>>>
>>>       
>
>
>