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Primeur weekly 2015-12-21

Focus

e-Infrastructure brings computational experts and application developers together to cope with avalanche of data ...

Crowd computing

400 core PicoCluster demonstrated ...

Quantum computing

Quantum cryptography to prevent data 'hacking', new AXA Research Fund chair awarded to ICFO of Barcelona ...

Focus on Europe

IBM opens Watson IoT global headquarters and extends power of cognitive computing to a connected world ...

PRACE announces Summer of HPC 2015 award winners ...

Call opened for 2016 International Summer School on HPC Challenges in Computational Sciences ...

Middleware

Better tools for scientists - improved memory debugging, deeper profiling and new platforms in Allinea's 6.0 release ...

Allinea DDT enables new frontiers in CFD research at Argonne ...

Hardware

Intersect360 Research launches invitation to participate in HPC processor study ...

BittWare joins the OpenPOWER Foundation ...

Hewlett Packard Enterprise brings network monitoring software to virtualized network infrastructure ...

Researchers harness power of Thunder supercomputer at AFRL Supercomputing Resource Center ...

Applications

Registration for ASC16 Student Supercomputer Challenge now open ...

Scientists compose complex math equations to replicate behaviours of Earth systems ...

UZH scientists predict activity of human genes ...

LCAM centre among the best in Europe ...

Better therapies due to computer models: TU Dresden engineers develop simulations of the human heart ...

TOP500

Exxact GPU cluster ranked in the TOP500 list of world's most powerful supercomputers ...

The Cloud

ClusterVision Trinity runs UberCloud HPC application containers ...

AT&T and IBM expand their strategic relationship in managed application and managed hosting services ...

Allinea DDT enables new frontiers in CFD research at Argonne

18 Dec 2015 Argonne - Scientists from the Heat and Mass Transfer Technological Center (CTTC) at the Technical University of Catalonia in Spain, have harnessed the extreme performance of the Mira supercomputer with their in-house multi-physics CFD code as a result of collaboration on scalable debugging for the high-end system between Allinea Software and Argonne National Laboratory. After participating in the Argonne Training Programme for Extreme Scale Computing (ATPESC) at the Argonne Leadership Computing Facility (ALCF) in the US, scientists from the CTTC had the opportunity to use ALCF's supercomputer, Mira - a 10-petaflops IBM Blue Gene/Q supercomputer equipped with 786,432 processors and 768 terabytes of memory - to test the performance and scalability of their CFD code, TermoFluids. The focus was set on the first level of parallelisation based on a distributed memory model and MPI communications.

"Before accessing Mira, TermoFluids had been used on production simulations up to around 5,000 CPU cores and scalability tests up to 10,000 CPU cores", Ricard Borrell, the research manager behind Termo Fluids, commented. "On Mira we have increased this figure by an order of magnitude and have now run the code up to 131,072 CPU cores. Not only did this include the most time-consuming part of the simulations, i.e. the time-integration, but other aspects that can become critical overheads such as the pre-processing, the simulation set-up, and IO operations for check pointing as well."

Through Mira, the code could be run on much larger problems up to billions of unknowns. This required some changes, however, on the type of some integer variables in order to avoid those that fell out of range. When achieving this order of magnitude leap in the size of the problem and number of parallel processors being used, Richard Borrell encountered new problems in the code that only appeared at this larger scale. Given that the issues couldn't be reproduced on a smaller scale in order to find the bugs, the team turned to Allinea DDT.

"Debuggers are essential tools for our users as they scale their application on Mira, and there have been several instances where users have leaned on a debugger to find issues as they have scaled on the system", Kalyan Kumaran, Manager, Performance Engineering at ALCF, explained. "Allinea scaled their debugger to perform well on leadership class systems like ours. This helped us to choose this tool as we were looking for a debugger that would scale to the entire Mira system." He added that as most ALCF users access the systems remotely, a remote connection client such as Allinea's is important for ease of use.

"High-performance computing resources like Mira give developers like us the power to go further", added Richard Borrell. "Extracting that full performance is critical if you want to handle more complex problems, finer resolutions and achieve new frontiers - and you'll need Allinea DDT to do it."

More information on how this was achieved is available in the case study .
Source: Allinea Software

Back to Table of contents

Primeur weekly 2015-12-21

Focus

e-Infrastructure brings computational experts and application developers together to cope with avalanche of data ...

Crowd computing

400 core PicoCluster demonstrated ...

Quantum computing

Quantum cryptography to prevent data 'hacking', new AXA Research Fund chair awarded to ICFO of Barcelona ...

Focus on Europe

IBM opens Watson IoT global headquarters and extends power of cognitive computing to a connected world ...

PRACE announces Summer of HPC 2015 award winners ...

Call opened for 2016 International Summer School on HPC Challenges in Computational Sciences ...

Middleware

Better tools for scientists - improved memory debugging, deeper profiling and new platforms in Allinea's 6.0 release ...

Allinea DDT enables new frontiers in CFD research at Argonne ...

Hardware

Intersect360 Research launches invitation to participate in HPC processor study ...

BittWare joins the OpenPOWER Foundation ...

Hewlett Packard Enterprise brings network monitoring software to virtualized network infrastructure ...

Researchers harness power of Thunder supercomputer at AFRL Supercomputing Resource Center ...

Applications

Registration for ASC16 Student Supercomputer Challenge now open ...

Scientists compose complex math equations to replicate behaviours of Earth systems ...

UZH scientists predict activity of human genes ...

LCAM centre among the best in Europe ...

Better therapies due to computer models: TU Dresden engineers develop simulations of the human heart ...

TOP500

Exxact GPU cluster ranked in the TOP500 list of world's most powerful supercomputers ...

The Cloud

ClusterVision Trinity runs UberCloud HPC application containers ...

AT&T and IBM expand their strategic relationship in managed application and managed hosting services ...