[Users] meeting minutes for 2017-03-13

[Steven R. Brandt]

Steve was there, too.

--Steve


On 03/13/2017 10:10 AM, Roland Haas wrote:
> Present: Frank, Eloisa, Roland, Peter, Jonah, Erik, Vassili, Bhavesh,
> Ian
>
> Roland asked about overlap of communication and computation during SYNC
> statements.
> * communication buffers are all data between pairs of processors
> * multi-threaded MPI may be required to keep a thread inside of MPI all
>    the time for systems where MPI does no work unless a caller is inside
>    its code. Could use self-compiled OpenMPI on blue waters or
>    multi-threaded Cray MPI.
> * suggestions to use mpi trace
> * stand-alone test may be best
> * need to determine that there is actually a benefit of this overlap
>
> Piraha parser:
> * currently stop parsing a CCL file at the first CCL syntax error but
>    will parse multiple files for errors.
> * since syntax errors in piraha include things like mis-spelling
>    CCTK_REAL Roland thinks that aborting at syntax errors is bad also
>    since typically one will modify only a single CCL files when eg
>    working on a thorn
> * this is however larger than the original intent of the ticket, which
>    was about some specific files not parsing
> * Roland will provide a set of ccl files that should parse but do not
>    parse
>
> testsuite problems:
> * see issues on Nebula Haswel
> * see issues on Roland's laptop Kaby Lake
> * see issues on Ian's laptop/workstation (Kaby lake)
>
> Workshop this year:
> * no date set yet
>
> Yours,
> Roland
>
>
>
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