Changes between Version 18 and Version 19 of Docs/Polaris

Timestamp:

10/06/13 16:28:41 (8 years ago)

Author:

grenville

Comment:

—

Docs/Polaris

@@ -162 +162 @@
 The model build information is kept in configuration files which are read by the FCM build system. The appropriate compiler flags are used to build the model along with information about which libraries to link. We have used the following flags for the Polaris intel compiler for both model and communications builds
 
-{{{-i8 -r8 -fp-model precise -O1}}}
+{{{-i8 -r8 -fp-model precise -O1 -openmp}}}
 
 
@@ -169 +169 @@
 === FCM Branches ===
 
-Navigate to ''model selection -> FCM configuration -> FCM options for atmosphere and reconfiguration'' and include the following branch
+Navigate to ''model selection -> FCM configuration -> FCM options for atmosphere and reconfiguration''.
+
+Until we introduce keywords, specify revision number 11979 for the UM code base and include the following branch
 
 
@@ -187 +189 @@
 
 Navigate to ''model selection -> user information and target machine -> job submission method''
-Choose the option ''''qsub' for SGE(SGI)''' for the submission method, enter polaris.leeds.ac.uk for the '''Host name''', select '''Change machine config file''' and enter '''sgi-intel-polaris'''. We note that OpenMP works on Polaris, but there appears to be an issue with MPI multi-threading which prevents the use of the UM I/O servers, in which case, navigate to ''model selection -> input/output control and resources -> IO services'' and set '''Number of IO servers''' to "0"
+Choose the option ''''qsub' for SGE(SGI)''' for the submission method, enter polaris.leeds.ac.uk for the '''Host name''', select '''Change machine config file''' and enter '''sgi-intel-polaris'''. 
 
 Navigate to ''model selection -> input/output control and resources -> user hand edit files'' and include '''/home/grenville/umui_jobs/hand_edits/polaris_8.4.1''' in the Hand edits list. This is currently necessary to mange the way Polaris handles the module command in the k shell. Future work should see the need for this to disappear.
 
-== 4 Known issues ==
-The I/O servers are currently not configurable as a result of a problem with the multi-threaded intelmpi implementation. The model has been built with openmpi which does not support multi-threading.
-
-== 5 Example UMUI Job ==
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+
+== 4 Example UMUI Job ==
 The following job is currently under user grenville in the UMUI
 ||Job Id||  Model  ||
 ||xidew||HadGEM3-GA4.0 Polaris||
 
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+This job uses the UM I/O servers which require that the model run with at least two OpenMP threads. We have successfully run the model using mvapich2 as the mpi implementation which supports multi-threaded mpi. The model runs with single threading with both openmpi and intemlpi mpi implemantations - in these cases OpenMP code directives are obeyed but the model can not support I/O servers. 
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