<div dir="ltr"><div class="gmail_default" style="font-family:georgia,serif;font-size:large">But Do you know why after the first checkpoint the execution is frezzed during a time similar to the interval and, after that, a new checkpoint is triggered? </div>
<div class="gmail_default" style="font-family:georgia,serif;font-size:large">Thank you.</div></div><div class="gmail_extra"><br><br><div class="gmail_quote">2014-07-17 16:43 GMT+02:00 Bland, Wesley B. <span dir="ltr"><<a href="mailto:wbland@anl.gov" target="_blank">wbland@anl.gov</a>></span>:<br>
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You’ll probably need to somehow get your application to run longer then. Unfortunately, MPICH doesn’t support manually starting a checkpoint at this time.
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<div>On Jul 17, 2014, at 9:29 AM, Marcela Castro León <<a href="mailto:mcastrol@gmail.com" target="_blank">mcastrol@gmail.com</a>> wrote:</div>
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<div class="gmail_default" style="font-family:georgia,serif;font-size:large">Hi</div>
<div class="gmail_default" style="font-family:georgia,serif;font-size:large"><br>
</div>
<div class="gmail_default" style="font-family:georgia,serif;font-size:large">I just want to make a one checkpoint during the execution, at the middle. </div>
<div class="gmail_default" style="font-family:georgia,serif;font-size:large">We'are trying to observe the I/O to reduce the time using a parallel file system.</div>
<div class="gmail_default" style="font-family:georgia,serif;font-size:large"><br>
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<div class="gmail_default" style="font-family:georgia,serif;font-size:large">Thanks.<br>
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<div class="gmail_quote">2014-07-17 13:30 GMT+02:00 Bland, Wesley B. <span dir="ltr">
<<a href="mailto:wbland@anl.gov" target="_blank">wbland@anl.gov</a>></span>:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
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<div>Is there a reason you can't just take the checkpoints less frequently?</div>
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On Jul 17, 2014, at 4:41 AM, "Marcela Castro León" <<a href="mailto:mcastrol@gmail.com" target="_blank">mcastrol@gmail.com</a>> wrote:<br>
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<div class="gmail_default" style="font-family:georgia,serif;font-size:large">Hi,</div>
<div class="gmail_default" style="font-family:georgia,serif;font-size:large">I'm using mpich 2.1.5 compiled to use blcr checkpoint.</div>
<div class="gmail_default" style="font-family:georgia,serif;font-size:large">I'm having problems with the checkpoint interval.</div>
<div class="gmail_default" style="font-family:georgia,serif;font-size:large">When I execute:</div>
<div class="gmail_default"><font face="courier new, monospace">mpiexec -ckpointlib blcr -ckpoint-prefix /partnfs/mpichchk -ckpoint-interval 120 -f maquinas -n 16 ./bt.C.16<br>
</font></div>
<div class="gmail_default"><span style="font-family:georgia,serif;font-size:large"><br>
</span></div>
<div class="gmail_default"><font face="georgia, serif" size="4">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.</font></div>
<div class="gmail_default"><font face="georgia, serif" size="4">I only achieve to get a checkpoint by setting a checkpoint interval almost at the end of the execution but it is not useful. </font></div>
<div class="gmail_default"><font face="georgia, serif" size="4"><br>
</font></div>
<div class="gmail_default"><font face="georgia, serif" size="4">How can I solve it?</font></div>
<div class="gmail_default"><span style="font-family:georgia,serif;font-size:large">Besides, Is there a way to know how long is the checkpoint in time?</span><br>
</div>
<div class="gmail_default"><font face="georgia, serif" size="4"><br>
</font></div>
<div class="gmail_default"><font face="georgia, serif" size="4">Thank you very much.</font></div>
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<div class="gmail_default"><font face="georgia, serif" size="4">Marcela</font></div>
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<div class="gmail_default"><font face="comic sans ms, sans-serif">mpiexec -info</font></div>
<div class="gmail_default"><font face="comic sans ms, sans-serif">HYDRA build details:</font></div>
<div class="gmail_default"><font face="comic sans ms, sans-serif"> Version: 1.5</font></div>
<div class="gmail_default"><font face="comic sans ms, sans-serif"> Release Date: Mon Oct 8 14:00:48 CDT 2012</font></div>
<div class="gmail_default"><font face="comic sans ms, sans-serif"> CC: gcc </font></div>
<div class="gmail_default"><font face="comic sans ms, sans-serif"> CXX: c++ </font></div>
<div class="gmail_default"><font face="comic sans ms, sans-serif"> F77: gfortran </font></div>
<div class="gmail_default"><font face="comic sans ms, sans-serif"> F90: gfortran </font></div>
<div class="gmail_default"><font face="comic sans ms, sans-serif"> 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'</font></div>
<div class="gmail_default"><font face="comic sans ms, sans-serif"> Process Manager: pmi</font></div>
<div class="gmail_default"><font face="comic sans ms, sans-serif"> Launchers available: ssh rsh fork slurm ll lsf sge manual persist</font></div>
<div class="gmail_default"><font face="comic sans ms, sans-serif"> Topology libraries available: hwloc</font></div>
<div class="gmail_default"><font face="comic sans ms, sans-serif"> Resource management kernels available: user slurm ll lsf sge pbs</font></div>
<div class="gmail_default"><font face="comic sans ms, sans-serif"> Checkpointing libraries available: blcr</font></div>
<div class="gmail_default"><font face="comic sans ms, sans-serif"> Demux engines available: poll select</font></div>
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