Changes between Version 6 and Version 7 of Projects/Performance-Modelling


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Timestamp:
03/09/13 19:37:44 (7 years ago)
Author:
annette
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  • Projects/Performance-Modelling

    v6 v7  
    11= Performance Modelling =  
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    3 [[Image(heterogeneous_images-4.png)]] 
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    5 As we move towards the exascale-era, HPC systems are becoming increasingly complex with, for example, co-processors (eg, GPUs, Intel Xeon Phis), Non-uniform memory-access (NUMA) nodes, and various network structures, as well as the trend for increasing numbers of cores with decreasing speeds and decreasing memory per core. This makes it challenging to predict the performance of real applications on new and forthcoming machines.  
     3As we move towards the exascale-era, HPC systems are becoming increasingly complex with, for example, co-processors (eg, GPUs, Intel Xeon Phis), Non-uniform memory-access (NUMA) nodes, hyper-threading, and shared floating point units, as well as the trend for increasing numbers of cores with decreasing speeds and decreasing memory per core. This makes it challenging to predict the performance of real applications on new and forthcoming machines.  
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    75Similarly scientific software is evolving in order to solve larger and more intricate problems, which involves exploring more scalable model formulations, numerical methods and algorithms. An example of this is the joint Met Office and NERC project, Gung-Ho!, to develop the next generation Unified Model weather and climate prediction system: http://collab.metoffice.gov.uk/twiki/bin/view/Project/NGWCP 
     
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    119In this case a performance model encapsulates information about the software and hardware to make a prediction of elapsed wallclock run time for a given scenario.  
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     11[[Image(heterogeneous_images-5.png)]] 
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    1313''Image references: [http://frankdenneman.nl/2011/01/05/amd-magny-cours-and-esx/ [1]], [http://arstechnica.com/gadgets/2006/11/8250/ [2]], [http://www.techweekeurope.co.uk/news/supercooled-amd-bulldozer-breaks-overclocking-record-39553 [3]]''