[mpich-devel] Deadlock when using MPIX_Grequest interface

[Jeff Hammond]

On Wed, Mar 8, 2017 at 5:57 PM, Latham, Robert J. <robl at mcs.anl.gov> wrote:

> On Wed, 2017-03-08 at 15:17 -0800, Jeff Hammond wrote:
> >
> >
> > On Wed, Mar 8, 2017 at 2:25 PM, Latham, Robert J. <robl at mcs.anl.gov>
> > wrote:
> > > On Wed, 2017-03-08 at 09:25 +0000, Giuseppe Congiu wrote:
> > > > Hello Rob,
> > > >
> > > > > I'm excited to see someone using the MPIX_Grequest interface.
> > > We
> > > > > used
> > > > > the MPIX_Grequest interface to implement non-blocking
> > > collective
> > > > > I/O,
> > > > > and had some bad interactions between libc's aio and the
> > > grequest
> > > > > callbacks.  I don't know if you are running into something
> > > similar.
> > > >
> > > > Maybe. Do you have a description of the problem somewhere?
> > >
> > > The guy who did that work just left last Friday.  I'll have to dig
> > > up
> > > the archives. Looks like it was a hard-to-debug segfault  https://t
> > > rac.
> > > mpich.org/projects/mpich/ticket/2201
> > >
> >
> > That link is 404.  Not sure if temporary or permanent.
>
> Huh. Did it word-wrap in a strange way?
>
> https://trac.mpich.org/projects/mpich/ticket/2201
>
>
It's back now.  I guess Argonne hosting is inconsistent this week.

Jeff


> ==rob
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-- 
Jeff Hammond
jeff.science at gmail.com
http://jeffhammond.github.io/
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