[ofa-general] Usage of Infiniband Protocol Stack ?

[Hal Rosenstock]

On Fri, Sep 12, 2008 at 3:24 PM, Kumar, Amit H. <AHKumar at odu.edu> wrote:
> Thank you Hal & Joe for your prompt reply.
>
> Two more questions:
> If ifconfig for IB is just for IPoIB, is it okay to bring down this interface(ib0) and still be able to run applications like Mvapich2 and pvfs2 ??
>
> And I also assume that we At Least Need 1 Ethernet Interface Up for the correct operation of IB compiled Applications, without which IB compiled Applications will fail. Is this correct ??

I think some applications need an IP interface which could be ethernet
or IPoIB or any other network. Others don't need anything else as they
use the IB CM or RDMA CM.

There are specific mailing lists and documentation for mvapich2 and pvfs2.

-- Hal

> Thank you,
> Amit
>
>> -----Original Message-----
>> From: Hal Rosenstock [mailto:hal.rosenstock at gmail.com]
>> Sent: Friday, September 12, 2008 1:09 PM
>> To: Kumar, Amit H.
>> Cc: general at lists.openfabrics.org
>> Subject: Re: [ofa-general] Usage of Infiniband Protocol Stack ?
>>
>> On Fri, Sep 12, 2008 at 12:43 PM, Kumar, Amit H. <AHKumar at odu.edu>
>> wrote:
>> > I have some applications(mvapich2, pvfs2 ...) compiled to use the OFED
>> > Infiniband protocol stack.
>> >
>> > May be a stupid  question ..:
>> > Is it valid to see at the "ifconfig ib0" stats to report the usage of
>> IB
>> > protocol stack,  regardless what application I making use of the IB
>> stack.?
>>
>> ifconfig for IB interfaces shows the IPoIB stats.
>>
>> "Pure" IB stats are available from the PMA. These stats
>> (bytes*4,packets x in/out) are total (across all applications being
>> run). They can be obtained by the perfquery diagnostic tool or via a
>> Performance Manager.
>>
>> -- Hal
>>
>> > Thank you,
>> > Amit
>> >
>> >
>> >
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>