[mpich-discuss] Crash with hydra on MPI_Finalize

[Jain, Rohit]

Yes, seg fault. 

# Attempting stack trace sig 11
# Signal caught: signo [11]

It crashes with stacktrace that I showed below. There are no error
messages. Crash occurs in all the processes.

I recently started using --enable-debuginfo, as I read instruction
somewhere (mpich2 docs or totalview) that this option is required to use
mpich2 with totalview. My intention is to be able to debug my
application with totalview, not inside mpich2. But, it seem totalview
requires some visibility inside mpich2 to make some of its feature work.

And, you are right. mpich2-1.2.1p1 with mpd also crashes in similar way.

So, any chances of getting it fixed?

Regards,
Rohit


-----Original Message-----
From: mpich-discuss-bounces at mcs.anl.gov
[mailto:mpich-discuss-bounces at mcs.anl.gov] On Behalf Of Dave Goodell
Sent: Saturday, March 05, 2011 7:20 AM
To: mpich-discuss at mcs.anl.gov
Subject: Re: [mpich-discuss] Crash with hydra on MPI_Finalize

Crash how?  Is it segfaulting?  Is there an error message that you can
show us?

The MPIR_CommL_forget function only gets called when debugger support is
enabled, so there's a chance you're hitting a bug there that others do
not because many (most?) users do not enable debugger support.  If you
don't need debugger support (for inspecting message queues and the like,
not plain-old "-g" compilation), then you could remove
"--enable-debuginfo" from your configure line as a workaround.

Based on the information you've given us so far, I doubt this is a crash
that is caused by hydra vs. mpd.  Did you enable debugger support when
building your older version of MPICH2 as well?

-Dave

On Mar 5, 2011, at 2:09 AM CST, Jain, Rohit wrote:

> Hi,
>  
> I am seeing a crash with mpich2-1.3.3rc1, when application quits. This
is a specific case where all processes are exiting, and they call
MPI_Finalize almost at the same time.
>  
> # 0    0x08c2bff8: 'MPIR_CommL_forget + 0x28'
> # 1    0x08c1ff52: 'comm_delete + 0x1c2'
> # 2    0x08c20145: 'MPIR_Comm_release_always + 0x35'
> # 3    0x08c5358e: 'MPID_Finalize + 0x2e'
> # 4    0x08c27089: 'MPI_Finalize + 0x119'
>  
> Note that I recently started using hydra with this mpich2 version.
Earlier mpich2 version with mpd works fine.
>  
> Is there any difference in how hydra handles finalize?
> If so, does application need to change to make it work with hydra?
>  
> Regards,
> Rohit
>  
> _______________________________________________
> mpich-discuss mailing list
> mpich-discuss at mcs.anl.gov
> https://lists.mcs.anl.gov/mailman/listinfo/mpich-discuss

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