Hi Edson,
You seem to have hit a known bug that we have for dmtcp version 2.4.1.
We had an unfortunate regression concerning interval checkpointing.
--interval and DMTCP_CHECKPOINT_INTERVAL are not working properly
in version 2.4.1.
We will be releasing version 2.4.2 in a few days. In the meantime,
your options are to use dmtcp-2.4.0, or else the development
branch (which is currently reasonable stable). The development branch
can be found through:
google dmtcp download
--> http://dmtcp.sourceforge.net/downloads.html
----> git clone https://github.com/dmtcp/dmtcp.git
----> OR: wget https://github.com/dmtcp/dmtcp/archive/master.zip
Best,
- Gene
On Thu, Oct 08, 2015 at 07:29:38PM +0200, Edson Tavares de Camargo wrote:
> Hi Kapil, I will comment below:
>
> 2015-10-08 15:39 GMT+02:00 Kapil Arya <kapil.arya...@gmail.com>:
>
> > Hi Edson,
> >
> > For coordinator-less checkpointing, I would suggest that you use the
> > "--no-coordinator" flag with dmtcp_launch.
> >
>
> The version 2.2 woks fine with --no-coordination:
>
> ~/test/plugin/applic-initiated-ckpt/applic$ dmtcp_launch --no-coordinator
> ./applic
>
>
>
> > This allows you to specify an checkpoint interval.
> >
>
> In this case above, how the checkpoint interval works? Should the applic.c
> wait until DMTCP_CHECKPOINT_INTERVAL for makes the checkpoint. I ask
> because seems that it not waiting for DMTCP_CHECKPOINT_INTERVAL.
>
>
> > Further, you can also provide a port number with "--port" and then use
> > dmtcp_command to request checkpoints explicitly.
> >
>
> I would like that each process start the checkpoint in a different
> interval. For sample, suppose 4 MPI processes:
> - process 0 makes checkpoint every 5 seconds
> - process 1 makes checkpoint every 8 seconds
> - process 2 makes checkpoint every 3 seconds
> so on...
>
> Can I set that behaviour, that is, both interval and request checkpoints
> directly in my MPI application code?
>
>
> Thank you again!
>
> Edson
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