Hi Gilles,
Thank you for your reply. I am using Openmpi 3.0.0.
I tried the command you recommend, and it works right now. Perhaps this bug
is still there?
On Thu, Apr 12, 2018 at 10:06 PM, Gilles Gouaillardet <
gilles.gouaillar...@gmail.com> wrote:
> Which version of Open MPI are you running ?
> This reminds me of a bug in CMA that has already been fixed.
>
>
> can you try again with
>
>
> mpirun --mca btl_vader_single_copy_mechanism none ...
>
>
> Cheers,
>
> Gilles
>
> On Fri, Apr 13, 2018 at 1:51 PM, Kaiming Ouyang wrote:
> > Hi all,
> > I am trying to test the bandwidth of intra-MPI send and recv. The code is
> > attached here. When I give the input 2048 (namely each process will send
> and
> > receive 2GB data), the program reported:
> > Read 2147479552, expected 2147483648, errno = 95
> > Read 2147479552, expected 2147483648, errno = 98
> > Read 2147479552, expected 2147483648, errno = 98
> > Read 2147479552, expected 2147483648, errno = 98
> >
> > Does this mean Openmpi does not support the send and recv where data
> size is
> > larger than 2GB, or is there a bug in my code? Thank you.
> >
> >
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