[mvapich-discuss] Assertion failure in ch3_win_fns

[Mingzhe Li]

Hi Martin,

Thanks for the note. We would like to reproduce your issue on our system
first. Could you tell us which platform are you using? What are you
configuration options? Is it possible to send us your reproducer?

Regards,
Mingzhe


On Fri, May 16, 2014 at 11:08 AM, Martin Pokorny <mpokorny at nrao.edu> wrote:

> Hello,
>
> I'm encountering the following assertion failure in calls to
> MPI_Win_allocate when using mvapich2-2.0rc1. My test setup uses a small
> number of nodes on an Infiniband network.
>
>  Assertion failed in file src/mpid/ch3/channels/mrail/src/rdma/ch3_win_fns.c
>> at line 233: node_comm_ptr != NULL
>>
>
> I'm finding that the occurrence of this error seems to depend on the size
> of the window being allocated: the error occurs when the window size is
> small, but doesn't occur for larger window sizes. Small in my test being
> 4MiB, and large, 16MiB, but I haven't done a systematic investigation to
> search for a cutoff. My test allocates several windows of the same size,
> and it appears that the error occurs after a few successful allocations (of
> smaller size).
>
> Any suggestions?
>
> --
> Martin Pokorny
> Software Engineer - New Mexico Systems Group lead
> National Radio Astronomy Observatory - New Mexico Operations
>
>
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>
>
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