Hardware

Day 3 of optimising for the Xeon Phi, moving on to vectorisation

Author: Adrian Jackson
Posted: 11 Jun 2015 | 16:01

Moving from OpenMP to vectorisation and MPI

Reality hit home a bit on the third day of our intensive week working with Colfax to optimise codes for the Xeon Phi.

After further implementation and analysis work it appears that the removal of the allocation and deallocation calls from some of the low level routines in CP2K will improve the OpenMP performance on Xeon and Xeon Phi, but only because there is an issue with the Intel compiler that is causing poor performance. The optimisation can see a reduction in runtime of around 20-30% for the OpenMP code, but only with versions 15 and 16 of the Intel compiler, on v14 there is a much smaller performance improvement.

Second day of collaborating with Colfax

Author: Adrian Jackson
Posted: 10 Jun 2015 | 00:08

Day 2: profiling and the start of optimising

After a first day spent getting codes set up and systems running, we got into the profiling of CP2K in anger today and have made some good progress.

Working on the Xeon Phi

Author: Adrian Jackson
Posted: 8 Jun 2015 | 17:48

Intel Parallel Computing Center collaboration with Colfax

We're just kicking off a week's collaboration with Colfax, a US technology company that collaborates heavily with Intel on Xeon Phi optimisation and training for the Xeon Phi. 

Intel Parallel Computing Centre: progress report

Author: Adrian Jackson
Posted: 21 Nov 2014 | 10:29

EPCC's Grand Challenges Optimisation Centre, an Intel Parallel Computing Centre which we announced earlier in the year, has made significant progress over recent months. 

The collaboration was created to optimise codes for Intel processors, particularly to port and optimise scientific simulation codes for Intel Xeon Phi co-processors. As EPCC also runs the ARCHER supercomputer, which contains a large number of Intel Xeon processors (although no accelerators or co-processors), for EPSRC and other UK research funding councils, we also have a strong focus on ensuring that scientific simulation codes are highly optimised for these processors. Therefore, the IPCC work at EPCC has been concentrating on improving the performance of a range of codes that are heavily used for computational simulation in the UK on both Intel Xeon and Intel Xeon Phi processors.

New SGI system at EPCC: Ultra!

Author: Maciej Olchowik
Posted: 26 Aug 2014 | 17:37

Last month EPCC added a new supercomputer to its portfolio. Working in collaboration with the Digital Health Institute Scotland we have acquired the SGI UV2000 system. Unlike many of our existing HPC resources, Ultra (as it’s known by the DNS name) is not a cluster, there is just one Linux operating system controlling all 512 computing cores and 8TB of memory. This offers many advantages to the researchers and opens up new possibilities - suddenly we can run a large code without complex parallelisation!

Talking HPC with the Omega Tau podcast

Author: Iain Bethune
Posted: 11 Aug 2014 | 09:36

Omega Tau: science and engineering in your headphones is a STEM-themed podcast produced by Markus Völter and Nora Ludewig which covers a wide range of interesting topics including aerospace, spaceflight, computing and physical sciences in great detail through interviews and discussions with area experts.

ARCHER Phase 2 User Meeting

Author: Adrian Jackson
Posted: 16 Jul 2014 | 18:47

Last week saw EPSRC host a user meeting to discuss the phase 2 upgrade of ARCHER, the UK's national supercomputing service.

TeamEPCC & the ISC'14 Student Cluster Competition

Author: Xu Guo
Posted: 1 Jul 2014 | 14:35

This post was written by TeamEPCC, four MSc in HPC students who achieved the highest-ever LINPACK score in the Student Cluster Competition at ISC14. 

In the photo (left to right): Chenhui Quan, Konstantinos Mouzakitis, Emmanouil Farsarakis (Manos) and Georgios Iniatis. 

EPCC at ISC'14: come and say hello!

Author: Nick Brown
Posted: 13 Jun 2014 | 12:06

EPCC will be exhibiting in Booth 920.

International Supercomputing Conference (ISC) is one of the main events in the field of high performance computing, networking and storage. It has a diverse programme of keynote talks, research presentations, tutorials, BoFs and satellite events provided by 300 expert speakers along with over 170 exhibitors and 3,000 attendees. As usual, there will be a significant EPCC representation.

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