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Subject: Re: [OMPI devel] CM PML / OpenSHMEM
From: Ralph Castain (rhc_at_[hidden])
Date: 2013-10-29 13:57:34


Did that time get finalized? I recall the doodle, but not seeing a final decision

On Oct 29, 2013, at 10:53 AM, Joshua Ladd <joshual_at_[hidden]> wrote:

> These (and others) are exactly the issues we need to discuss with you guys next week.
>
> Josh
>
> -----Original Message-----
> From: devel [mailto:devel-bounces_at_[hidden]] On Behalf Of Ralph Castain
> Sent: Tuesday, October 29, 2013 1:29 PM
> To: Open MPI Developers
> Subject: Re: [OMPI devel] CM PML / OpenSHMEM
>
> I think the issue that may have caused this was the need for a double modex if the MPI layer selected a PML that used an MTL, and then the user provided oshmem MCA params specifying they use the BTL-related SPML component. My guess is that the defaults wound up creating that situation, which then led to the clean abort.
>
> Probably just a question of correctly setting defaults in the CM scenario.
>
> On Oct 29, 2013, at 10:02 AM, Barrett, Brian W <bwbarre_at_[hidden]> wrote:
>
>> Mellanox -
>>
>> It looks like someone fixed the segfault when calling start_pes() when
>> the CM PML is in use. However, I'm not sure that a clean abort is
>> much better. With the proc tags code (in both the trunk and v1.7),
>> there's no reason that you can't initialize both the btls and mtls.
>> This may require some additional coding, but I think it should be
>> doable. I'm happy to help with advice / discuss implementation
>> issues, but not supporting OpenSHMEM when the CM PML is in use is
>> unacceptable and is, in my mind, a blocker for v1.7.
>>
>> Brian
>>
>> --
>> Brian W. Barrett
>> Scalable System Software Group
>> Sandia National Laboratories
>>
>>
>>
>>
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