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usNIC released!
Aug 19,2013
I'm excited to announce that Cisco has just released usNIC as a feature of theUCS C-Series Rack Serversproduct line. usNIC is available since the release 1.5(2) of theCisco UCS C-Series Integrated Management Controller. ...
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Why is SR-IOV relevant in the HPC world ?
Aug 13,2013
One feature of the usNIC ultra-low latency Ethernet solution for the UCS Cisco VIC that we think is interesting is the fact that it is based on SR-IOV. What is SR-IOV, and why is it relevant in the HPC world? SR-IOV (Single Root I/O Virtualization) i...
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MPI newbie: Requirements and installation of an MPI
Jul 31,2013
I often get questions from those who are just starting with MPI; they want to know common things such as: How to install / setup an MPI implementation How to compile their MPI applications How to run their MPI applications How to learn more abou...
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Short message latency and NUMA effects
Jul 23,2013
I've previously written a bunch about the effects of location, Location, LOCATION! on MPI applications. Here's another subtle NUMA effect that a well-tuned MPI implementation can hide from you: intelligently distributing traffic between multiple netw...
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How many network links do you have for MPI traffic?
Jul 19,2013
If you're a bargain basement HPC user, you might well scoff at the idea of having more than one network interface for your MPI traffic. "I've got (insert your favorite high bandwidth network name here)! That's plenty to serve all my cores! Why woul...
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Ultra low latency Ethernet (UCS "usNIC"): questions and answers
Jul 17,2013
I have previously written a few details about our upcoming ultra low latency solution for High Performance Computing (HPC).  Since my last blog post, a few of you sent me emails asking for more technical details about it. So let's just put it al...
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Open MPI and the MPI-3 MPI_T interface
Jul 13,2013
Open MPI recently revamped its entire run-time parameter system (a.k.a.,"MCA parameter system") as part of its implementation effort for the "MPI_T" interface from MPI-3. The MPI_T interface is a standardized interface designed for MPI tools, but can...
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Why MPI is Good for You (part 3)
Jun 24,2013
I've previously posted on "Why MPI is Good for You" (blog tag: why-mpi-is-good-for-you).  The short version is that it hides the typical application programmer from lots and lots of underlying network stuff; stuff that they really, really don't ...
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The History and Development of the MPI standard
Jun 21,2013
Today's guest posting comes from Jesper Larsson Traff; he's Faculty of Informatics, Institute of Information Systems in the Research Group for Parallel Computing at the Vienna University of Technology (TU Wien). Have you ever wonderedwhyMP...
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MPI Quiz
Jun 06,2013
A fun scenario was proposed in the MPI Forum today.  What do you think this code will do? MPI_Comm comm, save;MPI_Request req;MPI_Init(NULL, NULL);MPI_Comm_dup(MPI_COMM_WORLD, &comm);MPI_Comm_rank(comm, &rank);save = comm;MPI_Isend(smsg,...
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Cisco's Philosophy on Open Source
May 27,2013
Last weekend, I was fortunate enough to be able to attend the Midwest Open Source Software Conference (MOSSCon 2013).  I met some fascinating people, listened to some great talks, and learned a bunch of new things. All in all, a win. I also pres...
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Speaking about Open MPI / FOSS at Midwest Open Source Convention this weekend
May 15,2013
I've been a bit remiss about posting recently; it's conference-paper-writing season, folks - sorry. But I thought I'd mention that I'll be speaking at the Midwest Open Source Software Convention (MOSSCon) this weekend. I'll be talking about my work i...
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