--- MITgcm/doc/README 1998/04/26 17:42:46 1.5 +++ MITgcm/doc/README 1998/07/08 15:24:05 1.9 @@ -1,25 +1,73 @@ -$Header: /home/ubuntu/mnt/e9_copy/MITgcm/doc/README,v 1.5 1998/04/26 17:42:46 cnh Exp $ +$Header: /home/ubuntu/mnt/e9_copy/MITgcm/doc/README,v 1.9 1998/07/08 15:24:05 cnh Exp $ + MITgcmUV Getting Started ======================== o Introduction -o Install - tar -xvf ... - cd tools - genmake.dec - cd ../bin - ln -s ../tools/Makefile.dec makefile - make depend - make - setenv PARALLEL 1 - ../exe/barrier + This note is a guide to using the MIT General Circulation Model Ultra Verstaile + implementation, MITgmcUV. MITgcmUV is a Fortran code that implements the + algorithm described in Marshall et. al. 1997, Hill, Adcroft, ... + The MITgcmUV implementation is designed to work efficiently on all classes + of computer platforms. It can be used in both a single processor mode + and a parallel processor mode. Parallel processing can be either multi-threaded + shared memory such as that found on CRAY T90 machines or it can be multi-process + distributed memory. A set of "execution enviroment" support routines are + used to allow the same numerical code to run on top of a single-process, multi-threaded + or distributed multi-process configuration. + +o Installing + To setup the model on a particular computer the code tree must be created + and appropriate compile and run scripts set up. For some platforms + the necessary scripts are included in the release - in this case follow + the steps below: + + 1. Extract MITgcmUV from the downloadable archive + tar -xvf checkpoint12.tar + + 2. Create platform specific make file + For example on a Digital UNIX machine the script "genmake.dec" can + be used as shown below + + cd bin + ../tools/genmake + cp Makefile.alpha Makefile -o Running + 3. Now create header file dependency entries + make depend + + 4. Compile code + make + + 5. Copy input files + cp ../verification/exp2/[a-z]* ../verification/exp2/*bin . - eedata - data + 6. Run baseline test case + setenv PARALLEL 1 + dmpirun -np 2 ../exe/mitgcmuv + + This runs a 4 degree global ocean climatological simulation. + By default this code is set to use two porcessors splitting + the model domain along the equator. Textual output is written + to files STDOUT.* and STDERR.* with one file for each process. + Model fileds are written to files suffixed .data and .meta + These files are written on a per process basis. The .meta + file indicates the location and shape of the subdomain in + each .data file. + +o Running + + - Input and output files + + Required files + ============== + The model is configured to look for two files with fixed names. + These files are called + "eedata" and "data". + The file eedata contains "execution environment" data. At present + this consists of a specification of the number of threads to + use in X and Y under multithreaded execution. - Serial execution @@ -35,4 +83,10 @@ - Parallel execution. Hybrid o References - + Web sites - HP + for doc Digital + SGI + Sun + Linux threads + CRAY multitasking + PPT notes