Re: [OMPI devel] OMPI 1.8.4rc1 issues

[Ralph Castain]

> On Nov 4, 2014, at 12:44 AM, Gilles Gouaillardet 
>  wrote:
> 
> Ralph,
> 
> On 2014/11/04 1:54, Ralph Castain wrote:
>> Hi folks
>> 
>> Looking at the over-the-weekend MTT reports plus at least one comment on the 
>> list, we have the following issues to address:
>> 
>> * many-to-one continues to fail. Shall I just assume this is an unfixable 
>> problem or a bad test and ignore it?
> my understanding is all the tasks send messages to task 0, task 0 cannot
> process all of them in real time, store them and keep allocating memory
> until an out of memory occurs.
> this could be fixed with some kind of flow control but i cannot tell
> this is an issue we want to get fixed.
> /* this test is pretty extreme and unlikely to occur in the real world,
> so solving it might require a lot of work for little value */

Okay, I’ll ignore it then

>> * neighbor_allgather_self segfaults in ompi_request_null or 
>> coll_base_comm_unselect or comm_activate or..., take your pick
> i made PR #73 https://github.com/open-mpi/ompi-release/pull/73 to fix this.

Thanks!


> 
> Cheers,
> 
> Gilles
> ___
> devel mailing list
> de...@open-mpi.org
> Subscription: http://www.open-mpi.org/mailman/listinfo.cgi/devel
> Link to this post: 
> http://www.open-mpi.org/community/lists/devel/2014/11/16172.php

Re: [OMPI devel] OMPI 1.8.4rc1 issues

[Gilles Gouaillardet]

Ralph,

On 2014/11/04 1:54, Ralph Castain wrote:
> Hi folks
>
> Looking at the over-the-weekend MTT reports plus at least one comment on the 
> list, we have the following issues to address:
>
> * many-to-one continues to fail. Shall I just assume this is an unfixable 
> problem or a bad test and ignore it?
my understanding is all the tasks send messages to task 0, task 0 cannot
process all of them in real time, store them and keep allocating memory
until an out of memory occurs.
this could be fixed with some kind of flow control but i cannot tell
this is an issue we want to get fixed.
/* this test is pretty extreme and unlikely to occur in the real world,
so solving it might require a lot of work for little value */
> * neighbor_allgather_self segfaults in ompi_request_null or 
> coll_base_comm_unselect or comm_activate or..., take your pick
i made PR #73 https://github.com/open-mpi/ompi-release/pull/73 to fix this.

Cheers,

Gilles

[OMPI devel] OMPI 1.8.4rc1 issues

[Ralph Castain]

Hi folks

Looking at the over-the-weekend MTT reports plus at least one comment on the 
list, we have the following issues to address:

* many-to-one continues to fail. Shall I just assume this is an unfixable 
problem or a bad test and ignore it?

* neighbor_allgather_self segfaults in ompi_request_null or 
coll_base_comm_unselect or comm_activate or..., take your pick

* MPI_IN_PLACE returns zero (issue #259 
https://github.com/open-mpi/ompi/issues/259)

Ralph