HPC

Open MPI 1.7.5 released

1 min read

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 Open MPI announcement list for more details.

HPC in L3

2 min read

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 network model; it adds more abstractions than are available […]

What’s Next for MPI?

1 min read

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 mature in both, and that maturity is trickling down to the implementations that are derived […]

Open MPI 1.7.4 released!

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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.  Consider this a ginormous “thank you!” to the entire Open MPI community! Special thanks goes to […]

More Network Locality (Netloc) progress

1 min read

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 to be done; we’re actively continuing work in multiple areas:

InsideHPC podcast: MPI collaboration with OpenFabrics

1 min read

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 API to the OpenFabrics OpenFrameworks working group. In that last blog post, I posted an abbreviated […]

A fun thing happened on the way to the OpenFrameworks discussion today…

1 min read

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 many of its much-criticized shortcomings.  Sean and Paul […]

Process affinity: Hop on the bus, Gus!

7 min read

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 snippet of the chorus to Paul Simon’s timeless classic “50 Ways to Leave Your […]

Call for Papers: EuroMPI/Asia 2014

2 min read

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 developments and applications of message-passing parallel computing, in particular in and related to the Message Passing Interface […]