= Performance of Standard Configurations =

== Global Atmosphere 7.0/Global Land 7.0 ==

||= Suite id =||= Description =||= UM Version =||= Date Run =||= Platform =||= Decomposition* =||= OpenMP Threads =||= Length of run =||= Dump Frequency =||= Wallclock =|| Data output vol || Comment ||
|| u-ab878 || GA7.0 N96 AMIP || 10.3 || 10.02.17 || ARCHER || 16 x 12 || 2 || 30 days || 10 days || 01:07:53 || ||
|| u-ag689/n216 || GA7.0 N216 AMIP || 10.5 || 22.06.17 || ARCHER || 42 x 36 || 1 || 10 days || 10 days || 00:29:27 || ||
|| u-ak155 || GC3.1 N216 ORCA025 || 10.6.1 || 07.06.17 || ARCHER || A:42x36 O:24x26 X:12 (6 nodes) || 1 || 30 days || 10 days || 01:24:29 || ||
|| u-ai862 || GC3.0 N96 ORCA025 || 10.6 || 20.07.17 || ARCHER || A:16x18 O:18x26 X:8 (4 nodes) || 1 || 10 days || 10 days || 00:27:03 || ||
|| u-an561 || UKESM0.6-CN PI, new oxidants file, lana, !StratTrop || 10.6 || 06.29.17 -- 07.17.17 || ARCHER || A:48x24 O:9x12 || 1 || 1yr (12 x 1 mnth cycles) || 10 days || 12 x 52 mins || 111GB (archived (no dumps, pp+compressed netcdf)) || ||
|| u-q606 || UKESM0.8-CN N216 ORCA025 (some improvements) || 10.7 || 04.10.17 || ARCHER || A:36x24 O:30x30 X:4 nodes (8/2) || 1 || 1 mnth || 10 days || 2:00:00  || || working copy only ||
|| u-aq711 || piControl N216-ORCA025 || 10.7 || 17.10.17 || ARCHER || A:36x24x2 O:30x30 X:8 nodes (16/2) || 2 (atm) || 1 mnth || 10 days || 1:45:00  || || 25% variation in run times - expensive because multi-threaded (necessary?) working copy only ||
|| u-as037 (r59528) || GC3.1 N96 ORCA1 PI Control CMIP6 || 10.7 || 11.11.17 || ARCHER || A:12x8 O:9x8 X:6 (3 nodes) || 2 || 1m || 10 days || 00:56:59 || 162Gb (History_Data - 2month run) || ||
*Decomposition: A = Atmos (EW x NS), O = Ocean (EW x NS), X = XIOS processes (nodes)

== A more detailed view of u-as037 (r 61036) running on ARCHER ==
This looks at the performance of `HadGEM3-GC3.1 N96ORCA1 PI Control for CMIP6` over a wide range of atmosphere decompositions with a fixed number of IO servers (6).  The ocean decomposition was 9x8 and the XIOS used 6 processes.  The atmosphere was run with two threads, except for one run at 36x28 where three threads were used (3,186 processes in the graph below).

The following graphs show the model rate (in model years per day) against cost and total number of processes.  Each point in the graph is the result of running the coupled suite for a model month.  The cost of computing the graph was 440 kAU.

[[Image(Rplot05.jpeg )]] 



[[Image(Rplot06.jpeg )]]