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Open MPI 1.7.5 released
Mar 21,2014
After a metric ton of work by the entire community, Open MPI has released version 1.7.5. Among the zillions of minor updates and new enhancements are two major new features: MPI-3.0 conformance OpenSHMEM support (Linux only) See this post on the ...
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HPC in L3
Mar 10,2014
As an HPC old-timer, I'm used to thinking of HPC networks as large layer-2 (L2) subnets.  All HPC traffic (e.g., MPI traffic) is therefore designed to stay within a single L2 subnet. The next layer up - L3 - is the "networking" layer in the OSI ...
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What's Next for MPI?
Feb 18,2014
MPI-3 has been out for over a year and a half.  MPICH supports all of the mandatory MPI-3 behavior and some of its optional semantics.  Open MPI supports all of MPI-3 except the new one-sided semantics.  New functionality is becoming m...
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Open MPI 1.7.4 released!
Feb 07,2014
It took us longer than we intended, but we finally released Open MPI v1.7.4.   Woo hoo!  (we got nice coverage from El Reg, too) This is a monster release; it represents hundreds (thousands? millions?) of person-hours of work.  Conside...
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More Network Locality (Netloc) progress
Jan 31,2014
We announced the Network locality project at SC'13, and generated a LOT of interest (far more than I even anticipated!).  As a refresher, here's a link to a a blog entry we wrote about Netloc back in November. There is still much work ...
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InsideHPC podcast: MPI collaboration with OpenFabrics
Jan 30,2014
In my last blog post, I described a new collaboration between the MPI community and the OpenFabrics verbs community. The collaboration started with the OpenFrameworks group asking the MPI community to list its requirements for a lower layer network A...
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A fun thing happened on the way to the OpenFrameworks discussion today...
Jan 21,2014
A few months ago, Sean Hefty from Intel started an effort to design a new low-level network API to replace libibverbs. That is, it's not libibverbs 2.0 - it's a new API that aims to both expand the scope of what libibverbs did, and also to address ma...
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Process affinity: Hop on the bus, Gus!
Jan 10,2014
Today's blog post is written by Joshua Ladd, Open MPI developer and HPC Algorithms Engineer at Mellanox Technologies. At some point in the process of pondering this blog post I noticed that my subconscious had, much to my annoyance, registered a snip...
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Call for Papers: EuroMPI/Asia 2014
Jan 06,2014
The 21st European MPI Users' Group Meeting, EuroMPI/AISA 2014, will be held in Kyoto, Japan, 9th -12th September, 2014. Background and topics EuroMPI is the preeminent meeting for users, developers and researchers to interact and discuss new developm...
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MPI_FESTIVUS(3)
Dec 25,2013
NAME MPI_Festivus -An MPI function for the rest of us SYNTAX C Syntax #includeint MPI_Festivus(void *handle, char *requested, char *provided, MPI_Info *result) Fortran Syntax use mpi_f08 MPI_FESTIVUS(handle, requested, provided, resultl...
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Call for Workshops: EuroMPI/Asia 2014
Dec 20,2013
The 21st European MPI Users' Group Meeting, EuroMPI/AISA 2014, will be held in Kyoto, Japan, 9th -12th September, 2014. In addition to the main conference's technical program, EuroMPI/ASIA 2014 is soliciting proposals for one-day or half-day wor...
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Open MPI: Binding to core by default
Dec 18,2013
After years of discussion, the upcoming release of Open MPI 1.7.4 will change how processes are laid out ("mapped") and bound by default.  Here's the specifics: If the number of processes is <= 2, processes will be mapped by core If the nu...
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