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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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10 Years of Open MPI
Nov 22,2013
Today's the day. Today marks 10 years since the first commit in the original Open MPI CVS source code repository (which was later converted to Subversion): $svn log -r 1 http://svn.open-mpi.org/svn/ompi----------------------------------------------...
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At SC'13 next week? Come say hi!
Nov 13,2013
Are you going to be in Denver at SC'13 next week? Good! You need to stop by the Cisco booth (#2535) and say hi to your friendly neighborhood Open MPI developers: Dave Goodell, Reese Faucette, and Jeff Squyres. You also need to come to the Open MPI "S...
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Lawrence Berkeley Labs talk: (Open) MPI, Parallel Computing, Life, the Universe, and Everything
Nov 08,2013
Many thanks to the crew at LBL for hosting my talks yesterday.  There were many insightful questions and comments throughout both talks. Here's the slides from my first talk, entitled "(Open) MPI, Parallel Computing, Life, the Universe, and Ever...
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Lawrence Berkeley Labs talk: Cisco Userspace NIC (usNIC)
Nov 08,2013
Here's the slides from my second talk, which is a deep technical dive into both how the usNIC technology works, and how we use that technology in the BTL plugin that we wrote for Open MPI (which is upstream starting with Open MPI v1.7.3). Here's the...
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My new favorite Open MPI mpirun feature: tab completion
Nov 01,2013
Today's guest author is Nathan Hjelm, a Scientist 2 at Los Alamos National Laboratory. We recently added scripts to support tab completion of mpirun flags and run-time MCA configuration variables to the Open MPI trunk development. The scripts support...
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Speaking at Lawrence Berkeley National Lab next week
Oct 30,2013
Are you in the Northern California Bay Area and want to hear about Open MPI and/or Cisco's usNIC technology next week? If so, you're in luck! I'll be speaking at Lawrence Berkeley Lab (LBL) next Thursday, November 7, 2013, at 2:30pm.  Click thro...
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Hardware and software queuing
Oct 18,2013
I've talked before about how getting high performance in MPI is all about offloading to dedicated hardware.  You want to get software out of the way as soon as possible and let the underlying hardware progress the message passing at max speed. B...
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MPI newbie: Building MPI applications
Oct 12,2013
In a previous post, I gave some (very) general requirements for how to setup / install an MPI installation. This is post#2 in the series: now that you've got a shiny new computational cluster, and you've got one or more MPI implementations installed,...
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EuroMPI'13 Cisco slides: Open MPI Process Affinity User Interface
Sep 18,2013
The slides below are from my presentation at EuroMPI'13 about Open MPI's flexible process affinity interface (in OMPI 1.7.2 and later).  I described this system in a prior blog entries (one, two, three), but many people keep asking me about it. ...
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EuroMPI'13 Cisco slides: UCS, Nexus, usNIC
Sep 17,2013
A few people asked me to post the slides that I just presented in the Cisco vendor session at EuroMPI'13.  In short, I gave a brief overview of our servers and switches, and then some technical details of how we use SR-IOV in our usNIC, etc. Her...
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