Changes between Version 2 and Version 3 of Archer/ArcherUserExperience


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Timestamp:
14/02/14 12:12:54 (6 years ago)
Author:
grenville
Comment:

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  • Archer/ArcherUserExperience

    v2 v3  
    33{{{ 
    44I have been running some N512 tests of my mixed-layer coupled model (UM 7.8 + KPP mixed-layer ocean). 
    5  
    65On HECToR, I used cores nodes (960 for the UM, 32 for OASIS and 32 for KPP) and obtained 44.65 model days / wallclock day 
    7  
    86On ARCHER, I used 384 cores (336 for the UM, 24 for OASIS and 24 for KPP) and obtained 41.03 model days / wallclock day 
    9  
    10 If you take the model days/wallclock day figures to be the same, it indicates that HECToR gives the same speed as ARCHER for 2.85x more cores for the atmosphere (960/336). 
    11  
    12 My jobs were configured identically.  I used all the default compilation options on both systems.  I do not use OpenMP or the I/O server.  OASIS and KPP run much faster the UM, so the coupling is not slowing down the atmosphere.  I expect you would see exactly the same for an atmosphere-only job.  
     7If you take the model days/wallclock day figures to be the same, it indicates that HECToR gives the same speed as ARCHER  
     8for 2.85x more cores for the atmosphere (960/336). 
     9My jobs were configured identically.  I used all the default compilation options on both systems.  
     10I do not use OpenMP or the I/O server. OASIS and KPP run much faster the UM, so the coupling is not slowing down the atmosphere. 
     11I expect you would see exactly the same for an atmosphere-only job.  
    1312}}}