1 |
$Header$ |
$Header$ |
2 |
|
|
3 |
|
================ |
4 |
|
=== WARNING === |
5 |
|
================ |
6 |
|
|
7 |
|
|
8 |
|
For MITgcm Users : |
9 |
|
|
10 |
|
This directory (MITgcm/doc) does *NOT* contain the primary user |
11 |
|
documentation for the MITgcm code. We strongly suggest that you forgo |
12 |
|
the effort of downloading and "building" the documentation in the |
13 |
|
different formats (pdf, html, etc.) and instead read and/or download |
14 |
|
the documentation which is conveniently referenced from the main web |
15 |
|
site at: |
16 |
|
|
17 |
|
http://mitgcm.org |
18 |
|
|
19 |
|
|
20 |
|
|
21 |
|
For MITgcm Developers: |
22 |
|
|
23 |
|
If you wish to customize or extend the MITgcm code, this directory |
24 |
|
contains a "HOWTO" document that tries to explain: |
25 |
|
|
26 |
|
+ where the code, documentation, and test/verification |
27 |
|
data sets are arranged within the CVS repository; |
28 |
|
|
29 |
|
+ how to run the verification tests; |
30 |
|
|
31 |
|
+ how to get help from the core developers; and |
32 |
|
|
33 |
|
+ how to best integrate your work with the overall project. |
34 |
|
|
35 |
|
|
36 |
|
The document is available in SGML source within this directory: |
37 |
|
|
38 |
|
devel_HOWTO.sgml |
39 |
|
|
40 |
|
and in various formats on our web site: |
41 |
|
|
42 |
|
http://mitgcm.org/dev_docs/devel_HOWTO/ |
43 |
|
|
44 |
|
|
45 |
|
|
46 |
|
|
47 |
|
====================================================================== |
48 |
|
=== WARNING : The following has been superseeded by the on-line === |
49 |
|
=== documentation at: http://mitgcm.org === |
50 |
|
====================================================================== |
51 |
|
|
52 |
|
|
53 |
MITgcmUV Getting Started |
MITgcmUV Getting Started |
54 |
======================== |
======================== |
73 |
the steps below: |
the steps below: |
74 |
|
|
75 |
1. Extract MITgcmUV from the downloadable archive |
1. Extract MITgcmUV from the downloadable archive |
76 |
tar -xvf checkpoint12.tar |
tar -xvf cNN.tar |
77 |
|
|
78 |
2. Create platform specific make file |
2. Create platform specific make file |
79 |
For example on a Digital UNIX machine the script "genmake.dec" can |
For example on a Digital UNIX machine the script "genmake" can |
80 |
be used as shown below |
be used as shown below |
81 |
|
|
82 |
cd bin |
cd bin |
89 |
4. Compile code |
4. Compile code |
90 |
make |
make |
91 |
|
|
92 |
5. Copy input files |
5. To run the model with example data see the "README" in each of |
93 |
cp ../verification/exp2/[a-z]* ../verification/exp2/*bin . |
the example experiments in ../verification/exp*/ |
94 |
|
e.g. ../verification/exp2/README |
95 |
|
|
|
6. Run baseline test case |
|
|
setenv PARALLEL 1 |
|
|
dmpirun -np 2 ../exe/mitgcmuv ( Under Digital UNIX ) |
|
|
mpirun.p4shmem ../exe/mitgcmuv -np 2 ( Under Solaris + mpich) |
|
|
|
|
|
|
|
|
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. |
|
96 |
|
|
97 |
o Running |
o Running |
98 |
|
|
109 |
|
|
110 |
- Serial execution |
- Serial execution |
111 |
|
|
112 |
|
- Parallel execution. MPI |
113 |
|
mPx, nPy |
114 |
|
dmpirun |
115 |
|
|
116 |
- Parallel execution. Threads |
- Parallel execution. Threads |
117 |
nSx, nSy |
nSx, nSy |
118 |
setenv PARALLEL n |
setenv PARALLEL n |
119 |
nTx=2, nTy=2 |
nTx=2, nTy=2 |
120 |
|
|
|
- Parallel execution. MPI |
|
|
mPx, nPy |
|
|
dmpirun |
|
|
|
|
121 |
- Parallel execution. Hybrid |
- Parallel execution. Hybrid |
122 |
|
|
123 |
|
o Cutomising the code |
124 |
|
|
125 |
|
Model structure |
126 |
|
=============== |
127 |
|
The "numerical" model is contained within a execution |
128 |
|
environment support wrapper. This wrapper is designed |
129 |
|
to provide a general framework for grid-point models. |
130 |
|
MITgcmUV is a specific numerical model that uses the |
131 |
|
framework. |
132 |
|
Under this structure the model is split into |
133 |
|
execution environment support code and conventional |
134 |
|
numerical model code. The execution environment |
135 |
|
support code is held under the "eesupp" directory. |
136 |
|
The grid point model code is held under the |
137 |
|
"model" directory. |
138 |
|
Code execution actually starts in the eesupp |
139 |
|
routines and not in the model routines. For this |
140 |
|
reason the top level main.F is in the eesupp/src |
141 |
|
directory. End-users should not need to worry about |
142 |
|
this level. The top-level routine for the numerical |
143 |
|
part of the code is in model/src/the_model_main.F. |
144 |
|
|
145 |
|
|
146 |
o References |
o References |
147 |
Web sites - HP |
Web sites - HP |
148 |
for doc Digital |
for doc Digital |