HPC
How many network links do you have for MPI traffic?
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 would I need more than that?R…
Ultra low latency Ethernet (UCS “usNIC”): questions and answers
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 all out there.…
Open MPI and the MPI-3 MPI_T interface
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 be used by regular MPI a…
Why MPI is Good for You (part 3)
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 want to be involved in. Here…
The History and Development of the MPI standard
Today’s guest posting comes from Jesper Larsson Träff; 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 wondered why MPI is designed the way that it is? The slides…
MPI Quiz
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, 4194304, MPI_CHAR, rank, 123, comm, &req); M…
Cisco’s Philosophy on Open Source
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 presented a talk on two things: The general open source ph…
Speaking about Open MPI / FOSS at Midwest Open Source Convention this weekend
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 in Open MPI, Ha…
Round-Up: Cisco at HPC for Wall Street
We had a great time at the recent 10th Annual High Performance Computing Linux for Wall Street event in New York on April 8, 2013. This year’s HPC conference focused on speed and cutting-edge advances in network visibility, analytics, and instrumentation. Some of the brightest minds in the financial…
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