Open MPI logo

Open MPI Development Mailing List Archives

  |   Home   |   Support   |   FAQ   |   all Development mailing list

Subject: Re: [OMPI devel] [OMPI users] cartofile
From: Ralph Castain (rhc_at_[hidden])
Date: 2009-10-13 14:12:18

We agreed on today's telecon to leave the code in the OMPI code base
for now, but to remove the option from the mpirun man page since
nobody can explain how to use it anyway.

Then we will wait in hope that someone(s) complete the coding of this
"feature" and document its use.

On Oct 13, 2009, at 12:09 PM, Kenneth Lloyd wrote:

> I agree with Terry and Eugene, but now what are we going to do about
> it?
> This is a potentially very powerful feature.
> Ken
>> -----Original Message-----
>> From: devel-bounces_at_[hidden]
>> [mailto:devel-bounces_at_[hidden]] On Behalf Of Terry Dontje
>> Sent: Tuesday, October 13, 2009 7:08 AM
>> To: Open MPI Developers
>> Subject: Re: [OMPI devel] [OMPI users] cartofile
>> After rereading the manpage for the umpteenth time I agree
>> with Eugene
>> that the information provided on cartofile is next to
>> useless. Ok, so
>> you describe what your node looks like but what does mpirun
>> or libmpi do with that information? Other than the option to
>> provide the cartofile it isn't obvious how a user or libmpi
>> uses this information.
>> I've looked on the faq and wiki and have not found anything
>> yet on how one "current" uses cartofile.
>> --td
>> Eugene Loh wrote:
>>> This e-mail was on the users alias... see
>>> There wasn't much response, so let me ask another question.
>> How about
>>> if we remove the cartofile section from the DESCRIPTION
>> section of the
>>> OMPI mpirun man page? It's a lot of text that illustrates how to
>>> create a cartofile without saying anything about why one
>> would want to
>>> go to the trouble. What does this impact? What does it change?
>>> What's the motivation for doing this stuff? What's this
>> stuff good for?
>>> Another alternative could be to move the cartofile description to a
>>> FAQ page.
>>> The mpirun man page is rather long and I was thinking that
>> if we could
>>> remove some "low impact" stuff out, we could improve the overall
>>> signal-to-noise ratio of the page.
>>> In any case, I personally would like to know what
>> cartofiles are good for.
>>> Eugene Loh wrote:
>>>> Thank you, but I don't understand who is consuming this
>> information
>>>> for what. E.g., the mpirun man page describes the carto file, but
>>>> doesn't give users any indication whether they should be worrying
>>>> about this.
>>>> Lenny Verkhovsky wrote:
>>>>> Hi Eugene,
>>>>> carto file is a file with a staic graph topology of your node.
>>>>> in the opal/mca/carto/file/carto_file.h you can see example.
>>>>> ( yes I know that , it should be help/man list :) ) Basically it
>>>>> describes a map of your node and inside interconnection.
>>>>> Hopefully it will be discovered automatically someday,
>> but for now
>>>>> you can describe your node manually.
>>>>> Best regards
>>>>> Lenny.
>>>>> On Thu, Sep 17, 2009 at 12:38 AM, Eugene Loh <Eugene.Loh_at_[hidden]
>>>>> <mailto:Eugene.Loh_at_[hidden]>> wrote:
>>>>> I feel like I should know, but what's a cartofile? I
>> guess you
>>>>> supply "topological" information about a host, but I
>> can't tell
>>>>> how this information is used by, say, mpirun.
>> ----------------------------------------------------------------------
>>> --
>>> _______________________________________________
>>> devel mailing list
>>> devel_at_[hidden]
>> _______________________________________________
>> devel mailing list
>> devel_at_[hidden]
> _______________________________________________
> devel mailing list
> devel_at_[hidden]