Hi Thomas,

Thanks for reporting. Could you please give a try with the current development version and let us know if you still experience the segfault?

OR alternatively

Thanks,

Antonio

On Wednesday, July 24, 2013 03:01:30 PM Thomas Ropars wrote:

> Hi,

> I'm working with mpich 3.0.4 and I get a segfault in Hydra when I try to

> run an application on a large number of processes (8192).

> I simply run the following command:

> mpirun -f ~/machine_list -n 8192 my_exec_file

> I tried to run mpirun in valgrind to identify the problem and here is

> the output:

> Invalid read of size 1

> ==44266== at 0x4A077F2: __GI_strlen (mc_replace_strmem.c:284)

> ==44266== by 0x3D774802B5: strdup (in /lib64/libc-2.12.so)

> ==44266== by 0x40EBA5: HYD_pmcd_pmi_fill_in_exec_launch_info

> (pmiserv_utils.\

> c:375)

> ==44266== by 0x40A5C2: HYD_pmci_launch_procs (pmiserv_pmci.c:121)

> ==44266== by 0x403A1E: main (mpiexec.c:326)

> ==44266== Address 0x0 is not stack'd, malloc'd or (recently) free'd

> If I try to run on a smaller number of processes (eg 512), everything

> works fine.

> Any suggestion to solve the problem?

> Thomas

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Antonio J. Peña

Postdoctoral Appointee

Mathematics and Computer Science Division

Argonne National Laboratory

9700 South Cass Avenue, Bldg. 240, Of. 3148

Argonne, IL 60439-4847

(+1) 630-252-7928

apenya@mcs.anl.gov