"Ralph Castain via devel" ---11/12/2019 09:24:23 AM---> On Nov 11,
2019, at 4:53 PM, Gilles Gouaillardet via devel
<mailto:devel@lists.open-mpi.org> wrote: >
From: "Ralph Castain via devel"
<mailto:devel@lists.open-mpi.org>
To: "OpenMPI Devel"
<
gnore ---11/12/2019 02:25:14 PM---Hi Austen, Thanks for
the reply. What I am seeing is consistent with your thought, in that when I se
From: John DelSignore
To: Open MPI Developers
Cc: Austen W Lauria, devel
Date: 11/12/2019 02:25 PM
Subject: [EXTERNAL] Re: [OMPI devel] Open MPI v4.0.1: Process is ha
>
To: Open MPI Developers
<mailto:devel@lists.open-mpi.org>
Cc: Austen W Lauria <mailto:awlau...@us.ibm.com>, devel
<mailto:devel-boun...@lists.open-mpi.org>
Date: 11/12/2019 02:25 PM
Subject: [EXTERNAL] Re: [OMPI devel] Open MPI v4.0.1: Process is hanging inside
MPI_Init() w
Austen W Lauria , devel
Date: 11/12/2019 02:25 PM
Subject: [EXTERNAL] Re: [OMPI devel] Open MPI v4.0.1: Process is hanging inside
MPI_Init() when debugged with TotalView
Hi Austen,
Thanks for the reply. What I am seeing is consistent with your thought, in
<mailto:devel-boun...@lists.open-mpi.org>
Date: 11/12/2019 02:25 PM
Subject: [EXTERNAL] Re: [OMPI devel] Open MPI v4.0.1: Process is hanging inside
MPI_Init() when debugged with TotalView
Hi Austen,
Thanks for the reply. What I am seeing is consistent with your
which I
see as a good thing as well.
"Ralph Castain via devel" ---11/12/2019 09:24:23 AM---> On Nov 11,
2019, at 4:53 PM, Gilles Gouaillardet via devel
<mailto:devel@lists.open-mpi.org> wrote: >
From: "Ralph Castain via devel"
<mailto:devel@lists.open-mpi.org&
this variable to:
>
> pthread_mutex_lock();
> flg = new_val;
> pthread_cond_signal();
>pthread_mutex_unlock();
>
>This provides the memory barrier for the thread polling on
>the
ood thing as well.
"Ralph Castain via devel" ---11/12/2019 09:24:23
AM---> On Nov 11, 2019, at 4:53 PM, Gilles Gouaillardet via
devel wrote: >
From: "Ralph Castain via devel"
To: "Ope
gt; pthread_cond_signal();
> pthread_mutex_unlock();
>
> This provides the memory barrier for the thread polling on the flag to see
> the update - something the volatile keyword doesn't do on its own. I think
> it's also much cleaner as it eliminates an arbitrary sleep from the
devel"
To: "OpenMPI Devel"
Cc: "Ralph Castain"
Date: 11/12/2019 09:24 AM
Subject: [EXTERNAL] Re: [OMPI devel] Open MPI v4.0.1: Process is
hanging inside MPI_Init() when debugged with TotalView
Sent by
"Ralph Castain"
Date: 11/12/2019 01:28 PM
Subject: [EXTERNAL] Re: [OMPI devel] Open MPI v4.0.1: Process is hanging
inside MPI_Init() when debugged with TotalView
Sent by:"devel"
Just to be clear as well: you cannot use the pthread method yo
>
From: "Ralph Castain via devel"
<mailto:devel@lists.open-mpi.org>
To: "OpenMPI Devel" <mailto:devel@lists.open-mpi.org>
Cc: "Ralph Castain" <mailto:r...@open-mpi.org>
Date: 11/12/2019 09:24 AM
Subject: [EXTERNAL] Re:
devel mailto:devel@lists.open-mpi.org> > wrote: >
From: "Ralph Castain via devel" mailto:devel@lists.open-mpi.org> >
To: "OpenMPI Devel" mailto:devel@lists.open-mpi.org>
>
Cc: "Ralph Castain" mailto:r...@open-mpi.org> >
Date: 11/12/2019 09
uot; ---11/12/2019 09:24:23 AM---> On Nov 11, 2019, at 4:53
> PM, Gilles Gouaillardet via devel wrote: >
>
> From: "Ralph Castain via devel"
> To: "OpenMPI Devel"
> Cc: "Ralph Castain"
> Date: 11/12/2019 09:24 AM
> Subject: [EXTE
11/12/2019 09:24 AM
Subject: [EXTERNAL] Re: [OMPI devel] Open MPI v4.0.1: Process is hanging
inside MPI_Init() when debugged with TotalView
Sent by:"devel"
> On Nov 11, 2019, at 4:53 PM, Gilles Gouaillardet via devel
wrote:
>
> John,
>
> OMP
> On Nov 11, 2019, at 4:53 PM, Gilles Gouaillardet via devel
> wrote:
>
> John,
>
> OMPI_LAZY_WAIT_FOR_COMPLETION(active)
>
>
> is a simple loop that periodically checks the (volatile) "active" condition,
> that is expected to be updated by an other thread.
> So if you set your breakpoint
John,
OMPI_LAZY_WAIT_FOR_COMPLETION(active)
is a simple loop that periodically checks the (volatile) "active"
condition, that is expected to be updated by an other thread.
So if you set your breakpoint too early, and **all** threads are stopped
when this breakpoint is hit, you might
Hi John
Sorry to say, but there is no way to really answer your question as the OMPI
community doesn't actively test MPIR support. I haven't seen any reports of
hangs during MPI_Init from any release series, including 4.x. My guess is that
it may have something to do with the debugger
Hi,
An LLNL TotalView user on a Mac reported that their MPI job was hanging inside
MPI_Init() when started under the control of TotalView. They were using Open
MPI 4.0.1, and TotalView was using the MPIR Interface (sorry, we don't support
the PMIx debugging hooks yet).
I was able to reproduce
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