Is there a reason you can't just take the checkpoints less frequently?

On Jul 17, 2014, at 4:41 AM, "Marcela Castro León" <mcastrol@gmail.com> wrote:

Hi,

I'm using mpich 2.1.5  compiled to use blcr checkpoint.

I'm having problems with the checkpoint interval.

When I execute:

mpiexec -ckpointlib blcr -ckpoint-prefix /partnfs/mpichchk -ckpoint-interval 120 -f maquinas -n 16 ./bt.C.16

In fact,  at the second 120, the execution is interrupted for checkpointing, but, as the checkpoint last more than 120 seconds, another checkpoint is immediately triggered instead of resuming the application.

I only achieve to get a checkpoint by setting a checkpoint interval almost at the end of the execution but it is not useful. 

How can I solve it?

Besides, Is there a way to know how long is the checkpoint in time?

Thank you very much.

Marcela

mpiexec -info

HYDRA build details:

    Version:                                 1.5

    Release Date:                            Mon Oct  8 14:00:48 CDT 2012

    CC:                              gcc    

    CXX:                             c++    

    F77:                             gfortran   

    F90:                             gfortran   

    Configure options:                       '--disable-option-checking' '--prefix=/soft/mpich2/mpich2-1.5-blcr8.3' '--with-hydra-ckpointlib=blcr' '--with-blcr=/soft/blcr' '--enable-checkpointing' '--cache-file=/dev/null' '--srcdir=.' 'CC=gcc' 'CFLAGS= -O2' 'LDFLAGS= -L/soft/blcr/lib64 -L/soft/blcr/lib' 'LIBS=-lrt -lcr -lpthread ' 'CPPFLAGS= -I/SRC/mpi/mpich2-1.5/src/mpl/include -I/SRC/mpi/mpich2-1.5/src/mpl/include -I/SRC/mpi/mpich2-1.5/src/openpa/src -I/SRC/mpi/mpich2-1.5/src/openpa/src -I/SRC/mpi/mpich2-1.5/src/mpi/romio/include -I/soft/blcr/include'

    Process Manager:                         pmi

    Launchers available:                     ssh rsh fork slurm ll lsf sge manual persist

    Topology libraries available:            hwloc

    Resource management kernels available:   user slurm ll lsf sge pbs

    Checkpointing libraries available:       blcr

    Demux engines available:                 poll select

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