[mvapich-discuss] Is MVAPICH working?

[Christopher Tanner]

Thanks Matt -

Upon trying to install OFED, I received the following error
'Failed to install ibutils RPM'
Apparently this is b/c it couldn't find the dependency 'libstdc++.so. 
6(GLIBCXX_3.4.9)(64bit)'

I searched for an RPM for this, but I couldn't find one for my release  
(RHEL4). I have a file libstdc++.so.6.0.3 file in the /usr/lib  
directory, but I'm assuming this isn't what it needs.

Is the ibutils package important? Can I install a library for a  
different release (I think I found it for Madriva)? If not, where can  
I find the source to compile it myself for my release?

Thanks again.

-------------------------------------------
Chris Tanner
Space Systems Design Lab
Georgia Institute of Technology
christopher.tanner at gatech.edu
-------------------------------------------



On Apr 3, 2008, at 5:08 PM, Matthew Koop wrote:
> Chris,
>
> Have you (or your vendor) installed any InfiniBand libraries on the
> machines yet? You will need to have a library like OpenFabrics that
> interfaces with InfinBand installed on the cluster. You can download  
> the
> latest OpenFabrics packages at:
>
> http://www.openfabrics.org/builds/ofed-1.3/release/OFED-1.3.tgz
>
> This is the "Gen2" interface. You will need to use the  
> make.mvapich.gen2
> script to compile -- directly using configure and make will result  
> in a
> TCP build only. OpenFabrics Enterprise Edition (OFED) includes the
> MVAPICH2 package as well, which may help simplify the process for you.
>
> To verify if InfiniBand is being used, you can use the included OSU
> benchmarks in the 'osu_benchmarks' directory to test performance.  
> You can
> expect <5usec latency when using IB.
>
> Let us know if you get stuck anywhere. Thanks,
>
> Matt
>
>
> On Thu, 3 Apr 2008, Christopher Tanner wrote:
>
>> Hello all -
>>
>> This is my first post to this group and I am a newbie to MVAPICH.
>> Our cluster has both gigabit ethernet and Infiniband connections.
>> Since I was unfamiliar with Infiniband, I simply used MPICH2 with  
>> good
>> success. However, we paid for the Infiniband connections, so I want  
>> to
>> use them. So I downloaded and compiled the MVAPICH2 1.0.1 source.
>>
>> I have a couple issues:
>> a) I don't know what kind of Infiniband libraries we have (i.e. VAPI,
>> uDAPL, Gen2-IB, iWARP). In fact, I don't know what any of those  
>> are...
>> Does it really matter? I just did the usual 'configure' and 'make'
>> with what seemed to be no critical errors during compilation. All of
>> the included make.mvapich2.* scripts did not work for one reason or
>> another.
>>
>> b) MVAPICH2 uses an mpd just like MPICH2. Is there a way I can tell  
>> if
>> the mpiexec compiled from the MVAPICH2 source is really using the
>> Infiniband links instead of the ethernet links? I haven't been able  
>> to
>> see a big speed difference in the MPI applications I executed
>> recently. Thus far everything runs the same as when MPICH2 was
>> installed...
>>
>> Thanks guys and sorry for the really newbie questions...
>>
>> -------------------------------------------
>> Chris Tanner
>> Space Systems Design Lab
>> Georgia Institute of Technology
>> christopher.tanner at gatech.edu
>> -------------------------------------------
>>
>>
>>
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>>
>