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| 6 |
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db2pdf -d ldp.dsl devel_HOWTO.sgml |
db2pdf -d ldp.dsl devel_HOWTO.sgml |
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db2html -d ./ldp.dsl devel_HOWTO.sgml |
db2html -d ./ldp.dsl devel_HOWTO.sgml |
| 10 |
|
db2html -u -d ./ldp.dsl devel_HOWTO.sgml |
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| 12 |
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|
| 13 |
<articleinfo> |
<articleinfo> |
| 24 |
<revhistory> |
<revhistory> |
| 25 |
<revision> |
<revision> |
| 26 |
<revnumber>0.01</revnumber> |
<revnumber>0.01</revnumber> |
| 27 |
<date>2003-0-07</date> |
<date>2003-08-07</date> |
| 28 |
<authorinitials>eh3</authorinitials> |
<authorinitials>eh3</authorinitials> |
| 29 |
<revremark> |
<revremark> |
| 30 |
Initial version. |
Initial version. |
| 128 |
doc tags -- connect to real docs? |
doc tags -- connect to real docs? |
| 129 |
eesupp cnh? |
eesupp cnh? |
| 130 |
exe ecco user build |
exe ecco user build |
| 131 |
*- jobs runtime shell scripts for |
,- jobs runtime shell scripts for |
| 132 |
| various platforms |
| various platforms |
| 133 |
| lsopt line search |
| lsopt line search |
| 134 |
m| model main dynamics (core) |
m| model main dynamics (core) |
| 135 |
e| optimization_drivers ? |
e| optimization_drivers ? |
| 136 |
r| optim line search interface |
r| optim line search interface |
| 137 |
g| pkg alternate and optional numerics, etc. |
g| pkg alternate and optional numerics, etc. |
| 138 |
e*- tools |
e|- tools |
| 139 |
?| tutorial_examples documented tests |
?| tutorial_examples documented tests |
| 140 |
| only populated on release1 branch |
| only populated on release1 branch |
| 141 |
| and not validated during "testscript" |
| and not validated during "testscript" |
| 142 |
*- utils |
'- utils |
| 143 |
verification std tests |
verification std tests |
| 144 |
|
|
| 145 |
|
|
| 316 |
</sect2> |
</sect2> |
| 317 |
|
|
| 318 |
<sect2> |
<sect2> |
| 319 |
<title>Editing</title> |
<title>Editing the Documentation</title> |
| 320 |
|
|
| 321 |
<para>The documentation is contained in the |
<para>The documentation is contained in the |
| 322 |
<filename>manual</filename> directory in a raw LaTeX format. |
<filename>manual</filename> directory in a raw LaTeX format. |
| 364 |
</sect2> |
</sect2> |
| 365 |
|
|
| 366 |
<sect2> |
<sect2> |
| 367 |
<title>Building</title> <para>Given the directory structure of |
<title>Building the Documentation</title> |
| 368 |
<xref linkend="documentation_getting">, the entire documentation |
|
| 369 |
for the web site can be built using:</para> |
<para>Given the directory structure of <xref |
| 370 |
|
linkend="documentation_getting">, the entire documentation for the web |
| 371 |
|
site can be built using:</para> |
| 372 |
|
|
| 373 |
<screen> |
<screen> |
| 374 |
$ cd mitgcm.org/devel/buildweb |
$ cd mitgcm.org/devel/buildweb |
| 399 |
|
|
| 400 |
</sect1> |
</sect1> |
| 401 |
|
|
| 402 |
|
<sect1 id="coding"> |
| 403 |
|
<title>Coding for MITgcm</title> |
| 404 |
|
|
| 405 |
|
<sect2 id="build_tools"> |
| 406 |
|
<title>Build Tools</title> |
| 407 |
|
|
| 408 |
|
<para>Many Open Source projects use the "GNU Autotools" to help streamline |
| 409 |
|
the build process for various Unix and Unix-like architectures. For a |
| 410 |
|
user, the result is the common "configure" (that is, |
| 411 |
|
"<filename>./configure && make && make install</filename>") commands. |
| 412 |
|
For MITgcm, the process is similar. Typical commands are:</para> |
| 413 |
|
|
| 414 |
|
<screen> |
| 415 |
|
$ genmake -mods=../code |
| 416 |
|
$ make depend |
| 417 |
|
$ make |
| 418 |
|
</screen> |
| 419 |
|
|
| 420 |
|
<para>The following sections describe the individual steps in the build |
| 421 |
|
process.</para> |
| 422 |
|
|
| 423 |
|
<sect3 id="genmake"> |
| 424 |
|
<title>The <filename>genmake2</> Utility</title> |
| 425 |
|
|
| 426 |
|
<para><emphasis>Please note that the older <filename>genmake</> is |
| 427 |
|
deprecated and will eventually be replaced by <filename>genmake2</>. |
| 428 |
|
This HOWTO only describes the newer tool.</emphasis></para> |
| 429 |
|
|
| 430 |
|
<para>The first step in any MITgcm build is to create a Unix-style |
| 431 |
|
<filename>Makefile</filename> which will be parsed by |
| 432 |
|
<filename>make</filename> to specify how to compile the MITgcm source |
| 433 |
|
files. For more detailed descriptions of what the make tools are and |
| 434 |
|
how they are used, please see:</para> |
| 435 |
|
|
| 436 |
|
<itemizedlist> |
| 437 |
|
<listitem> |
| 438 |
|
<para><ulink url="http://www.gnu.org/software/make/make.html"> |
| 439 |
|
http://www.gnu.org/software/make/make.html</></para> |
| 440 |
|
</listitem> |
| 441 |
|
<listitem> |
| 442 |
|
<para><ulink url="http://www.oreilly.com/catalog/make2/"> |
| 443 |
|
http://www.oreilly.com/catalog/make2/</></para> |
| 444 |
|
</listitem> |
| 445 |
|
</itemizedlist> |
| 446 |
|
|
| 447 |
|
<para>Genmake can often be invoked successfully with a command line as |
| 448 |
|
simple as:</para> |
| 449 |
|
|
| 450 |
|
<screen> |
| 451 |
|
$ genmake2 -mods=../code |
| 452 |
|
</screen> |
| 453 |
|
|
| 454 |
|
<para>However, some systems (particularly commercial Unixes that lack a |
| 455 |
|
more modern "/bin/sh" implementation or that have shells installed in |
| 456 |
|
odd locations) may require an explicit shell invocation such as one of |
| 457 |
|
the following: </para> |
| 458 |
|
|
| 459 |
|
<screen> |
| 460 |
|
$ /usr/bin/sh genmake2 -make=gmake -mods=../code |
| 461 |
|
$ /opt/gnu/bin/bash genmake2 -ieee -make=/usr/local/bin/gmake -mods=../code |
| 462 |
|
</screen> |
| 463 |
|
|
| 464 |
|
<para>The genmake2 code has been written in a Bourne and BASH (v1) |
| 465 |
|
compatible syntax so it should work with most "sh" and all recent "bash" |
| 466 |
|
implementations.</para> |
| 467 |
|
|
| 468 |
|
<para>As the name implies, <filename>genmake2</filename> generates a |
| 469 |
|
<filename>Makefile</filename>. It does so by first parsing the |
| 470 |
|
information supplied from the following sources</para> |
| 471 |
|
|
| 472 |
|
<orderedlist> |
| 473 |
|
<listitem> |
| 474 |
|
<para>a <filename>gm_local</filename> file in the current |
| 475 |
|
directory</para> |
| 476 |
|
</listitem> |
| 477 |
|
<listitem> |
| 478 |
|
<para>directly from command-line options</para> |
| 479 |
|
</listitem> |
| 480 |
|
<listitem> |
| 481 |
|
<para>an "options file" as specified by the command-line option |
| 482 |
|
<filename>-optfile='FILENAME'</filename></para> |
| 483 |
|
</listitem> |
| 484 |
|
</orderedlist> |
| 485 |
|
|
| 486 |
|
<para>then checking certain dependency rules (the package dependencies), |
| 487 |
|
and finally writing a <filename>Makefile</filename> based upon the |
| 488 |
|
source code that it finds. For convenience within various Unix |
| 489 |
|
shells, <filename>genmake2</> supports both "long"- and "short"-style |
| 490 |
|
options. A complete list of the available options can be obtained |
| 491 |
|
from:</para> |
| 492 |
|
|
| 493 |
|
<screen> |
| 494 |
|
$ genmake2 -help |
| 495 |
|
</screen> |
| 496 |
|
|
| 497 |
|
<para>The most important options for <filename>genmake2</> are:</para> |
| 498 |
|
|
| 499 |
|
<variablelist> |
| 500 |
|
|
| 501 |
|
<varlistentry> |
| 502 |
|
<term><filename>--optfile=/PATH/FILENAME</></term> |
| 503 |
|
|
| 504 |
|
<listitem> |
| 505 |
|
<para>This specifies the "options file" that should be used for a |
| 506 |
|
particular build. The options file is a convenient and |
| 507 |
|
machine-indepenent way of specifying parameters such as the |
| 508 |
|
FORTRAN compiler (<filename>FC=</>), FORTRAN compiler |
| 509 |
|
optimization flags (<filename>FFLAGS=</>), and the locations of |
| 510 |
|
various platform- and/or machine-specific tools |
| 511 |
|
(eg. <filename>MAKEDEPEND=</>). As with <filename>genmake2</>, |
| 512 |
|
all options files should be written to be compatible with |
| 513 |
|
Bourne--shell ("sh" or "BASH v1") syntax. Examples of various |
| 514 |
|
options files can be found in |
| 515 |
|
<filename>$ROOTDIR/tools/build_options</>.</para> |
| 516 |
|
|
| 517 |
|
<para>If no "optfile" is specified (either through the command lin |
| 518 |
|
or the environment variable), genmake2 will try to make a |
| 519 |
|
reasonable guess from the list provided in |
| 520 |
|
<filename>$ROOTDIR/tools/build_options</>. The method used for |
| 521 |
|
making this guess is to first determine the combination of |
| 522 |
|
operating system and hardware (eg. "linux_ia32") and then find a |
| 523 |
|
working Fortran compiler within the user's path. When these |
| 524 |
|
three items have been identified, genmake2 will try to find an |
| 525 |
|
optfile that has a matching name. </para> |
| 526 |
|
|
| 527 |
|
<para>Everyone is encouraged to submit their options files to the |
| 528 |
|
MITgcm project for inclusion (please send to |
| 529 |
|
<email>MITgcm-support@mitgcm.org</email>). We are particularly |
| 530 |
|
grateful for options files tested on new or unique |
| 531 |
|
platforms!</para> |
| 532 |
|
</listitem> |
| 533 |
|
|
| 534 |
|
</varlistentry> |
| 535 |
|
|
| 536 |
|
<varlistentry> |
| 537 |
|
<term><filename>-pdepend=/PATH/FILENAME</></term> |
| 538 |
|
|
| 539 |
|
<listitem> |
| 540 |
|
<para>This specifies the dependency file used for packages. If |
| 541 |
|
not specified, the default dependency file is |
| 542 |
|
<filename>$ROOTDIR/pkg/pkg_depend</>. The syntax for this file is |
| 543 |
|
parsed on a line-by-line basis where each line containes either a |
| 544 |
|
comment ("#") or a simple "PKGNAME1 (+|-)PKGNAME2" pairwise rule |
| 545 |
|
where the "+" or "-" symbol specifies a "must be used with" or a |
| 546 |
|
"must not be used with" relationship, respectively. If no rule is |
| 547 |
|
specified, then it is assumed that the two packages are compatible |
| 548 |
|
and will function either with or without each other.</para> |
| 549 |
|
</listitem> |
| 550 |
|
|
| 551 |
|
</varlistentry> |
| 552 |
|
|
| 553 |
|
<varlistentry> |
| 554 |
|
<term><filename>-pdefault=PKG</></term> |
| 555 |
|
<term><filename>-pdefault='PKG1 [PKG2 PKG3 ...]'</></term> |
| 556 |
|
<listitem> |
| 557 |
|
<para>This option specifies the default set of packages |
| 558 |
|
to be used. If not set, the default package list will |
| 559 |
|
be read from |
| 560 |
|
<filename>$ROOTDIR/pkg/pkg_default</>.</para> |
| 561 |
|
</listitem> |
| 562 |
|
</varlistentry> |
| 563 |
|
|
| 564 |
|
<varlistentry> |
| 565 |
|
<term><filename>-mods=DIR</></term> |
| 566 |
|
<term><filename>-mods='DIR1 [DIR2 ...]'</></term> |
| 567 |
|
<listitem> |
| 568 |
|
<para>This option specifies a list of directories containing |
| 569 |
|
"modifications". These directories contain files with names |
| 570 |
|
that may (or may not) exist in the main MITgcm source tree but |
| 571 |
|
will be overridden by any identically-named sources within the |
| 572 |
|
"MODS" directories. The order of precedence for this |
| 573 |
|
"name-hiding" is as follows:</para> |
| 574 |
|
|
| 575 |
|
<itemizedlist> |
| 576 |
|
<listitem><para>"MODS" directories (in the order given) |
| 577 |
|
</para></listitem> |
| 578 |
|
<listitem><para>Packages either explicitly specified or |
| 579 |
|
provided by default (in the order given)</para></listitem> |
| 580 |
|
<listitem><para>Packages included due to package dependencies |
| 581 |
|
(in the order that that package dependencies are |
| 582 |
|
parsed)</para></listitem> |
| 583 |
|
<listitem><para>The "standard dirs" (which may have been |
| 584 |
|
specified by the "-standarddirs" option)</para></listitem> |
| 585 |
|
</itemizedlist> |
| 586 |
|
|
| 587 |
|
</listitem> |
| 588 |
|
</varlistentry> |
| 589 |
|
|
| 590 |
|
<varlistentry> |
| 591 |
|
<term><filename>-make=/path/to/gmake</></term> |
| 592 |
|
<listitem> |
| 593 |
|
<para>Due to the poor handling of soft-links and other bugs common |
| 594 |
|
with the <filename>make</> versions provided by commercial Unix |
| 595 |
|
vendors, GNU <filename>make</filename> (sometimes called |
| 596 |
|
<filename>gmake</filename>) should be preferred. This option |
| 597 |
|
provides a means for specifying the make program to be |
| 598 |
|
used.</para> |
| 599 |
|
</listitem> |
| 600 |
|
</varlistentry> |
| 601 |
|
|
| 602 |
|
</variablelist> |
| 603 |
|
|
| 604 |
|
<para>A successful run of <filename>genmake2</> will produce a |
| 605 |
|
<filename>Makefile</>, a <filename>PACKAGES_CONFIG.h</> file, and |
| 606 |
|
various convenience files used for the automatic differentiation |
| 607 |
|
process.</para> |
| 608 |
|
|
| 609 |
|
<para>In general, it is best to use <filename>genmake2</> on a "clean" |
| 610 |
|
directory that is free of all source (*.[F,f],*.[F,f]90) and header |
| 611 |
|
(*.h,*.inc) files. Generally, this can be accomplished in an |
| 612 |
|
"un-clean" directory by running "make CLEAN" followed by "make |
| 613 |
|
makefile".</para> |
| 614 |
|
|
| 615 |
|
</sect3> |
| 616 |
|
|
| 617 |
|
<sect3 id="makefile_use"> |
| 618 |
|
<title>Using <filename>Makefile</></title> |
| 619 |
|
|
| 620 |
|
<para>Once a <filename>Makefile</> has been created, one can |
| 621 |
|
build an executable using:</para> |
| 622 |
|
|
| 623 |
|
<screen> |
| 624 |
|
$ make CLEAN |
| 625 |
|
$ make depend |
| 626 |
|
$ make |
| 627 |
|
</screen> |
| 628 |
|
|
| 629 |
|
<para>The "make CLEAN" step will remove any stale source files, include |
| 630 |
|
files, and links. It is strongly recommended for "un-clean" |
| 631 |
|
directories which may contain the (perhaps partial) results of |
| 632 |
|
previous builds. Such "debris" can interfere with the next stage of |
| 633 |
|
the build.</para> |
| 634 |
|
|
| 635 |
|
<para>The "make depend" step will create a large number of symbolic |
| 636 |
|
links from the local directory to the source file locations. It also |
| 637 |
|
parses these files and creates an extensive list of dependencies |
| 638 |
|
within the <filename>Makefile</> itself. The links that exist at this |
| 639 |
|
stage are mostly "large F" files (*.F and *.F90) that need to be |
| 640 |
|
processed by a C preprocessor ("CPP"). Since "make depend" edits the |
| 641 |
|
<filename>Makefile</>, it is important not to skip this step!</para> |
| 642 |
|
|
| 643 |
|
<para>The final "make" invokes the C preprocessor to produce the "little |
| 644 |
|
f" files (*.f and *.f90) and then compiles them to object code using |
| 645 |
|
the specified FORTRAN compiler and options. An intermediate script is |
| 646 |
|
often used during this stage to further process (usually, make simple |
| 647 |
|
substitutions) custom definitions such as variable types within the |
| 648 |
|
source files. This additional stage is necessary in order to overcome |
| 649 |
|
some of the inconsistencies in the sizes of objects (bytes) between |
| 650 |
|
different compilers.</para> |
| 651 |
|
|
| 652 |
|
<para>Please report compilation failures or other problems to |
| 653 |
|
<email>MITgcm-support@mitgcm.org</email>.</para> |
| 654 |
|
|
| 655 |
|
</sect3> |
| 656 |
|
|
| 657 |
|
</sect2> |
| 658 |
|
|
| 659 |
|
<sect2 id="verification"> |
| 660 |
|
<title>The Verification Suite</title> |
| 661 |
|
|
| 662 |
|
<para>The MITgcm CVS tree (within the <filename>$ROOTDIR/verification/</> |
| 663 |
|
directory) includes more than a dozen examples intended for regression |
| 664 |
|
testing. Each one of these example directories contains "known-good" |
| 665 |
|
output files along with all the input (including both code and data |
| 666 |
|
files) required for their re-calculation. These example directories are |
| 667 |
|
further broken down into sets of subdirectories |
| 668 |
|
(eg. <filename>/input</>, <filename>/code</>) intended to expedite the |
| 669 |
|
testing process.</para> |
| 670 |
|
|
| 671 |
|
<sect3 id="testreport"> |
| 672 |
|
<title>The <filename>testreport</> Utility</title> |
| 673 |
|
|
| 674 |
|
<para>Also included in <filename>$ROOTDIR/verification/</> are shell |
| 675 |
|
scripts for automated testing. The newest script (which was written |
| 676 |
|
to work with <filename>genmake2</>) is called <filename>testreport</>. |
| 677 |
|
This script can be used to build different versions of the MITgcm |
| 678 |
|
code, run the various examples, compare the output, and (if specified) |
| 679 |
|
email the results of each one of these tests to a central |
| 680 |
|
repository.</para> |
| 681 |
|
|
| 682 |
|
<para>On some systems, the testreport script can be run with a command |
| 683 |
|
line as simple as:</para> |
| 684 |
|
|
| 685 |
|
<screen> |
| 686 |
|
$ cd verification |
| 687 |
|
$ ./testreport -ieee |
| 688 |
|
</screen> |
| 689 |
|
|
| 690 |
|
<para>However, some systems (those lacking or wiht a broken "/bin/sh") |
| 691 |
|
may require an explicit shell invocation such as:</para> |
| 692 |
|
|
| 693 |
|
<screen> |
| 694 |
|
$ sh ./testreport -ieee -t 'exp0 exp4' |
| 695 |
|
$ /some/path/to/bash ./testreport -ieee -t 'ideal_2D_oce lab_sea natl_box' |
| 696 |
|
</screen> |
| 697 |
|
|
| 698 |
|
<para>The <filename>testreport</> script accepts a number of |
| 699 |
|
command-line options which can be listed using the <filename>-help</> |
| 700 |
|
option. The most important ones are:</para> |
| 701 |
|
|
| 702 |
|
<variablelist> |
| 703 |
|
|
| 704 |
|
<varlistentry> |
| 705 |
|
<term><filename>-ieee</></term> |
| 706 |
|
<listitem> |
| 707 |
|
<para>If allowed by the compiler (as defined in the "optfile"), |
| 708 |
|
use IEEE arithmetic. This option, along with the GCC compiler, |
| 709 |
|
is how the standard results were produced.</para> |
| 710 |
|
</listitem> |
| 711 |
|
</varlistentry> |
| 712 |
|
|
| 713 |
|
<varlistentry> |
| 714 |
|
<term><filename>-tdir TESTDIR</></term> |
| 715 |
|
<term><filename>-tdir 'TDIR1 TDIR2 [...]'</></term> |
| 716 |
|
<listitem> |
| 717 |
|
<para>This option specifies the test directory or list of test |
| 718 |
|
directories that should be used. Each of these entries should |
| 719 |
|
exactly (note: they are case sensitive!) match the names of |
| 720 |
|
directries in <filename>$ROOTDIR/verification/</>. If this |
| 721 |
|
option is omitted, then all directories that are properly |
| 722 |
|
formatted (that is, containing an <filename>input</> |
| 723 |
|
sub-directory and a <filename>results/output.txt</> file) will |
| 724 |
|
be used.</para> |
| 725 |
|
</listitem> |
| 726 |
|
</varlistentry> |
| 727 |
|
|
| 728 |
|
<varlistentry> |
| 729 |
|
<term><filename>-optfile=/PATH/FILENAME</></term> |
| 730 |
|
<term><filename>-optfile '/PATH/F1 [/PATH/F2 ...]'</></term> |
| 731 |
|
<listitem> |
| 732 |
|
<para>This specifies a list of "options files" that will be passed |
| 733 |
|
to <filename>genmake2</>. If multiple options files are used |
| 734 |
|
(say, to test different compilers or different sets of options |
| 735 |
|
for the same compiler), then each options file will be used with |
| 736 |
|
each of the test directories.</para> |
| 737 |
|
</listitem> |
| 738 |
|
</varlistentry> |
| 739 |
|
|
| 740 |
|
<varlistentry> |
| 741 |
|
<term><filename>-addr EMAIL</></term> |
| 742 |
|
<term><filename>-addr 'EMAIL1 EMAIL2 [...]'</></term> |
| 743 |
|
<listitem> |
| 744 |
|
<para>Send the results (namely, <filename>output.txt</>, |
| 745 |
|
<filename>genmake_local</>, <filename>genmake_state</>, and |
| 746 |
|
<filename>Makefile</>) to the specified email addresses. The |
| 747 |
|
results are gzipped, placed in a tar file, MIME encoded, and |
| 748 |
|
sent to the specified address. If no email addresses are |
| 749 |
|
specified, no mail is sent.</para> |
| 750 |
|
</listitem> |
| 751 |
|
</varlistentry> |
| 752 |
|
|
| 753 |
|
<varlistentry> |
| 754 |
|
<term><filename>-mpi</></term> |
| 755 |
|
<listitem> |
| 756 |
|
<para>If the necessary files |
| 757 |
|
(<filename>TESTDIR/code/CPP_EEOPTIONS.h_mpi</> and |
| 758 |
|
<filename>TESTDIR/code/SIZE.h_mpi</>) exist, then use them for an |
| 759 |
|
MPI--enabled run. Note that the use of MPI typically requires a |
| 760 |
|
special command option (see "-command" below) to invoke the MPI |
| 761 |
|
executable. Examples of PBS scripts using MPI with testreport can be |
| 762 |
|
found in the <ulink |
| 763 |
|
url="http://dev.mitgcm.org/cgi-bin/viewcvs.cgi/MITgcm_contrib/test_scripts/"> |
| 764 |
|
MITgcm-contrib area</ulink></para> |
| 765 |
|
</listitem> |
| 766 |
|
</varlistentry> |
| 767 |
|
|
| 768 |
|
<varlistentry> |
| 769 |
|
<term><filename>-command='some command to run'</></term> |
| 770 |
|
<listitem> |
| 771 |
|
<para>For some tests, particularly MPI runs, the default "make |
| 772 |
|
output.txt" is not sufficient. This option allows a more general |
| 773 |
|
command (or shell script) to be invoked. Examples of PBS scripts |
| 774 |
|
using MPI with testreport can be found in the <ulink |
| 775 |
|
url="http://dev.mitgcm.org/cgi-bin/viewcvs.cgi/MITgcm_contrib/test_scripts/"> |
| 776 |
|
MITgcm-contrib area</ulink></para> |
| 777 |
|
</listitem> |
| 778 |
|
</varlistentry> |
| 779 |
|
|
| 780 |
|
</variablelist> |
| 781 |
|
|
| 782 |
|
<para>The <filename>testreport</> script will write progress to the |
| 783 |
|
screen (stdout) as it runs. In addition, it will create a |
| 784 |
|
<filename>tr_out.txt</> file that contains a brief comparison of the |
| 785 |
|
current output with the "known-good" output.</para> |
| 786 |
|
|
| 787 |
|
</sect3> |
| 788 |
|
|
| 789 |
|
</sect2> |
| 790 |
|
|
| 791 |
|
|
| 792 |
|
<sect2 id="packages"> |
| 793 |
|
<title>Creating MITgcm Packages</title> |
| 794 |
|
|
| 795 |
|
<para>Optional parts of code have been separated from the MITgcmUV core |
| 796 |
|
driver code and organised into packages. The packaging structure |
| 797 |
|
provides a mechanism for maintaining suites of code, specific to |
| 798 |
|
particular classes of problems, in a way that is cleanly separated from |
| 799 |
|
the generic fluid dynamical engine.</para> |
| 800 |
|
|
| 801 |
|
<para>The MITgcmUV packaging structure is described below using generic |
| 802 |
|
package names ${pkg}. A concrete examples of a package is the code for |
| 803 |
|
implementing GM/Redi mixing. This code uses the package name</para> |
| 804 |
|
|
| 805 |
|
</sect2> |
| 806 |
|
|
| 807 |
|
</sect1> |
| 808 |
|
|
| 809 |
|
<sect1> |
| 810 |
|
<title>Chris's Notes...</title> |
| 811 |
|
|
| 812 |
|
<programlisting> |
| 813 |
|
MITgcmUV Packages |
| 814 |
|
================= |
| 815 |
|
|
| 816 |
|
Optional parts of code are separated from |
| 817 |
|
the MITgcmUV core driver code and organised into |
| 818 |
|
packages. The packaging structure provides a mechanism for |
| 819 |
|
maintaining suites of code, specific to particular |
| 820 |
|
classes of problem, in a way that is cleanly |
| 821 |
|
separated from the generic fluid dynamical engine. |
| 822 |
|
|
| 823 |
|
The MITgcmUV packaging structure is describe |
| 824 |
|
below using generic package names ${pkg}. |
| 825 |
|
A concrete examples of a package is the code |
| 826 |
|
for implementing GM/Redi mixing. This code uses |
| 827 |
|
the package name |
| 828 |
|
* ${PKG} = GMREDI |
| 829 |
|
* ${pkg} = gmredi |
| 830 |
|
* ${Pkg} = gmRedi |
| 831 |
|
|
| 832 |
|
Package states |
| 833 |
|
============== |
| 834 |
|
|
| 835 |
|
Packages can be any one of four states, included, |
| 836 |
|
excluded, enabled, disabled as follows: |
| 837 |
|
|
| 838 |
|
included(excluded) compile time state which |
| 839 |
|
includes(excludes) package |
| 840 |
|
code and routine calls from |
| 841 |
|
compilation/linking etc... |
| 842 |
|
|
| 843 |
|
enabled(disabled) run-time state which |
| 844 |
|
enables(disables) package code |
| 845 |
|
execution. |
| 846 |
|
|
| 847 |
|
Every call to a ${pkg}_... routine from outside the package |
| 848 |
|
should be placed within both a |
| 849 |
|
#ifdef ALLOW_${PKG} ... block and a |
| 850 |
|
if ( use${Pkg} ) ... then block. |
| 851 |
|
Package states are generally not expected to change during |
| 852 |
|
a model run. |
| 853 |
|
|
| 854 |
|
Package structure |
| 855 |
|
================= |
| 856 |
|
|
| 857 |
|
o Each package gets its runtime configuration |
| 858 |
|
parameters from a file named "data.${pkg}" |
| 859 |
|
Package runtime config. options are imported |
| 860 |
|
into a common block held in a header file |
| 861 |
|
called "${PKG}.h". |
| 862 |
|
|
| 863 |
|
o The core driver part of the model can check |
| 864 |
|
for runtime enabling or disabling of individual packages |
| 865 |
|
through logical flags use${Pkg}. |
| 866 |
|
The information is loaded from a |
| 867 |
|
global package setup file called "data.pkg". |
| 868 |
|
The use${Pkg} flags are not used within |
| 869 |
|
individual packages. |
| 870 |
|
|
| 871 |
|
o Included in "${PKG}.h" is a logical flag |
| 872 |
|
called ${Pkg}IsOn. The "${PKG}.h" header file can be imported |
| 873 |
|
by other packages to check dependencies and requirements |
| 874 |
|
from other packages ( see "Package Boot Sequence" section). |
| 875 |
|
NOTE: This procedure is not presently implemented, |
| 876 |
|
----- neither for kpp nor for gmRedi. |
| 877 |
|
|
| 878 |
|
CPP Flags |
| 879 |
|
========= |
| 880 |
|
|
| 881 |
|
1. Within the core driver code flags of the form |
| 882 |
|
ALLOW_${PKG} are used to include or exclude |
| 883 |
|
whole packages. The ALLOW_${PKG} flags are included |
| 884 |
|
from a PKG_CPP_OPTIONS block which is currently |
| 885 |
|
held in-line in the CPP_OPTIONS.h header file. |
| 886 |
|
e.g. |
| 887 |
|
|
| 888 |
|
Core model code ..... |
| 889 |
|
|
| 890 |
|
#include "CPP_OPTIONS.h" |
| 891 |
|
: |
| 892 |
|
: |
| 893 |
|
: |
| 894 |
|
|
| 895 |
|
#ifdef ALLOW_${PKG} |
| 896 |
|
if ( use${Pkg} ) CALL ${PKG}_DO_SOMETHING(...) |
| 897 |
|
#endif |
| 898 |
|
|
| 899 |
|
2. Within an individual package a header file, |
| 900 |
|
"${PKG}_OPTIONS.h", is used to set CPP flags |
| 901 |
|
specific to that package. It is not recommended |
| 902 |
|
to include this file in "CPP_OPTIONS.h". |
| 903 |
|
|
| 904 |
|
|
| 905 |
|
Package Boot Sequence |
| 906 |
|
===================== |
| 907 |
|
|
| 908 |
|
Calls to package routines within the core code timestepping |
| 909 |
|
loop can vary. However, all packages follow a required |
| 910 |
|
"boot" sequence outlined here: |
| 911 |
|
|
| 912 |
|
1. S/R PACKAGES_BOOT() |
| 913 |
|
: |
| 914 |
|
CALL OPEN_COPY_DATA_FILE( 'data.pkg', 'PACKAGES_BOOT', ... ) |
| 915 |
|
|
| 916 |
|
|
| 917 |
|
2. S/R PACKAGES_READPARMS() |
| 918 |
|
: |
| 919 |
|
#ifdef ALLOW_${PKG} |
| 920 |
|
if ( use${Pkg} ) |
| 921 |
|
& CALL ${PKG}_READPARMS( retCode ) |
| 922 |
|
#endif |
| 923 |
|
|
| 924 |
|
2. S/R PACKAGES_CHECK() |
| 925 |
|
: |
| 926 |
|
#ifdef ALLOW_${PKG} |
| 927 |
|
if ( use${Pkg} ) |
| 928 |
|
& CALL ${PKG}_CHECK( retCode ) |
| 929 |
|
#else |
| 930 |
|
if ( use${Pkg} ) |
| 931 |
|
& CALL PACKAGES_CHECK_ERROR('${PKG}') |
| 932 |
|
#endif |
| 933 |
|
|
| 934 |
|
3. S/R PACKAGES_INIT() |
| 935 |
|
: |
| 936 |
|
#ifdef ALLOW_${PKG} |
| 937 |
|
if ( use${Pkg} ) |
| 938 |
|
& CALL ${PKG}_INIT( retCode ) |
| 939 |
|
#endif |
| 940 |
|
|
| 941 |
|
|
| 942 |
|
Description |
| 943 |
|
=========== |
| 944 |
|
|
| 945 |
|
- ${PKG}_READPARMS() |
| 946 |
|
is responsible for reading |
| 947 |
|
in the package parameters file data.${pkg}, and storing |
| 948 |
|
the package parameters in "${PKG}.h". |
| 949 |
|
-> called in INITIALISE_FIXED |
| 950 |
|
|
| 951 |
|
- ${PKG}_CHECK() |
| 952 |
|
is responsible for validating |
| 953 |
|
basic package setup and inter-package dependencies. |
| 954 |
|
${PKG}_CHECK can import other package parameters it may |
| 955 |
|
need to check. This is done through header files "${PKG}.h". |
| 956 |
|
It is assumed that parameters owned by other packages |
| 957 |
|
will not be reset during ${PKG}_CHECK(). |
| 958 |
|
-> called in INITIALISE_FIXED |
| 959 |
|
|
| 960 |
|
- ${PKG}_INIT() |
| 961 |
|
is responsible for completing the |
| 962 |
|
internal setup of a package. This routine is called after |
| 963 |
|
the core model state has been completely initialised |
| 964 |
|
but before the core model timestepping starts. |
| 965 |
|
-> called in INITIALISE_VARIA |
| 966 |
|
|
| 967 |
|
Summary |
| 968 |
|
======= |
| 969 |
|
|
| 970 |
|
- CPP options: |
| 971 |
|
----------------------- |
| 972 |
|
* ALLOW_${PKG} include/exclude package for compilation |
| 973 |
|
|
| 974 |
|
- FORTRAN logical: |
| 975 |
|
----------------------- |
| 976 |
|
* use${Pkg} enable package for execution at runtime |
| 977 |
|
-> declared in PARAMS.h |
| 978 |
|
* ${Pkg}IsOn for package cross-dependency check |
| 979 |
|
-> declared in ${PKG}.h |
| 980 |
|
N.B.: Not presently used! |
| 981 |
|
|
| 982 |
|
- header files |
| 983 |
|
----------------------- |
| 984 |
|
* ${PKG}_OPTIONS.h has further package-specific CPP options |
| 985 |
|
* ${PKG}.h package-specific common block variables, fields |
| 986 |
|
|
| 987 |
|
- FORTRAN source files |
| 988 |
|
----------------------- |
| 989 |
|
* ${pkg}_readparms.F reads parameters from file data.${pkg} |
| 990 |
|
* ${pkg}_check.F checks package dependencies and consistencies |
| 991 |
|
* ${pkg}_init.F initialises package-related fields |
| 992 |
|
* ${pkg}_... .F package source code |
| 993 |
|
|
| 994 |
|
- parameter file |
| 995 |
|
----------------------- |
| 996 |
|
* data.${pkg} parameter file |
| 997 |
|
</programlisting> |
| 998 |
|
|
| 999 |
|
</sect1> |
| 1000 |
|
|
| 1001 |
|
|
| 1002 |
</article> |
</article> |
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