/[MITgcm]/MITgcm/eesupp/inc/BAR2.h
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Contents of /MITgcm/eesupp/inc/BAR2.h

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Revision 1.4 - (show annotations) (download)
Sat Mar 27 03:51:50 2004 UTC (20 years, 6 months ago) by edhill
Branch: MAIN
CVS Tags: checkpoint62v, checkpoint57m_post, checkpoint62u, checkpoint57g_pre, checkpoint62t, checkpoint57s_post, checkpoint58b_post, checkpoint57b_post, checkpoint57g_post, checkpoint56b_post, checkpoint57y_post, checkpoint65z, checkpoint65x, checkpoint65y, checkpoint54d_post, checkpoint65r, checkpoint65s, checkpoint65p, checkpoint65q, checkpoint65v, checkpoint65w, checkpoint65t, checkpoint65u, checkpoint65j, checkpoint65k, checkpoint65h, checkpoint65i, checkpoint65n, checkpoint54e_post, checkpoint65l, checkpoint65m, checkpoint65b, checkpoint65c, checkpoint65a, checkpoint65f, checkpoint65g, checkpoint65d, checkpoint65e, checkpoint62c, checkpoint57r_post, checkpoint57d_post, checkpoint57i_post, checkpoint59, checkpoint58, checkpoint55, checkpoint54, checkpoint57, checkpoint56, checkpoint53, checkpoint58f_post, checkpoint57n_post, checkpoint58d_post, checkpoint62s, checkpoint58a_post, checkpoint62r, checkpoint62q, checkpoint62p, checkpoint57z_post, checkpoint54f_post, checkpoint62a, checkpoint62g, checkpoint62f, checkpoint62e, checkpoint62d, checkpoint62k, checkpoint62j, checkpoint62i, checkpoint62h, checkpoint62o, checkpoint62n, checkpoint62m, checkpoint62l, checkpoint62w, checkpoint62z, checkpoint62y, checkpoint62x, checkpoint58y_post, checkpoint58t_post, checkpoint55i_post, checkpoint58m_post, checkpoint57l_post, checkpoint57t_post, checkpoint55c_post, checkpoint63g, checkpoint57v_post, checkpoint57f_post, checkpoint53d_post, checkpoint64, checkpoint65, checkpoint60, checkpoint61, checkpoint62, checkpoint63, checkpoint57a_post, checkpoint57h_pre, checkpoint66g, checkpoint66f, checkpoint66e, checkpoint66d, checkpoint66c, checkpoint66b, checkpoint66a, checkpoint66o, checkpoint66n, checkpoint66m, checkpoint66l, checkpoint66k, checkpoint66j, checkpoint66i, checkpoint66h, checkpoint54b_post, checkpoint58w_post, checkpoint57h_post, checkpoint52m_post, checkpoint57y_pre, checkpoint55g_post, checkpoint58o_post, checkpoint57c_post, checkpoint58p_post, checkpoint58q_post, checkpoint55d_post, checkpoint58e_post, mitgcm_mapl_00, checkpoint54a_pre, checkpoint63p, checkpoint63q, checkpoint63r, checkpoint63s, checkpoint63l, checkpoint63m, checkpoint63n, checkpoint63o, checkpoint63h, checkpoint63i, checkpoint63j, checkpoint63k, checkpoint63d, checkpoint63e, checkpoint63f, checkpoint53c_post, checkpoint63a, checkpoint63b, checkpoint63c, checkpoint55d_pre, checkpoint57c_pre, checkpoint58r_post, checkpoint55j_post, checkpoint54a_post, checkpoint55h_post, checkpoint58n_post, checkpoint57e_post, checkpoint55b_post, checkpoint53a_post, checkpoint65o, checkpoint59q, checkpoint59p, checkpoint59r, checkpoint59e, checkpoint59d, checkpoint59g, checkpoint59f, checkpoint59a, checkpoint55f_post, checkpoint59c, checkpoint59b, checkpoint59m, checkpoint59l, checkpoint59o, checkpoint59n, checkpoint59i, checkpoint59h, checkpoint59k, checkpoint53g_post, checkpoint57p_post, checkpint57u_post, checkpoint57q_post, eckpoint57e_pre, checkpoint58k_post, checkpoint62b, checkpoint58v_post, checkpoint56a_post, checkpoint64y, checkpoint64x, checkpoint58l_post, checkpoint64z, checkpoint53f_post, checkpoint64q, checkpoint64p, checkpoint64s, checkpoint64r, checkpoint64u, checkpoint64t, checkpoint64w, checkpoint64v, checkpoint64i, checkpoint64h, checkpoint64k, checkpoint64j, checkpoint64m, checkpoint64l, checkpoint64o, checkpoint64n, checkpoint64a, checkpoint64c, checkpoint64b, checkpoint64e, checkpoint64d, checkpoint64g, checkpoint64f, checkpoint57h_done, checkpoint57j_post, checkpoint57f_pre, checkpoint61f, checkpoint58g_post, checkpoint58x_post, checkpoint61n, checkpoint52n_post, checkpoint53b_pre, checkpoint59j, checkpoint58h_post, checkpoint56c_post, checkpoint58j_post, checkpoint57a_pre, checkpoint55a_post, checkpoint57o_post, checkpoint61q, checkpoint57k_post, checkpoint53b_post, checkpoint57w_post, checkpoint61e, checkpoint58i_post, checkpoint57x_post, checkpoint58c_post, checkpoint58u_post, checkpoint53d_pre, checkpoint58s_post, checkpoint55e_post, checkpoint61g, checkpoint61d, checkpoint54c_post, checkpoint61b, checkpoint61c, checkpoint61a, checkpoint61o, checkpoint61l, checkpoint61m, checkpoint61j, checkpoint61k, checkpoint61h, checkpoint61i, checkpoint61v, checkpoint61w, checkpoint61t, checkpoint61u, checkpoint61r, checkpoint61s, checkpoint61p, checkpoint61z, checkpoint61x, checkpoint61y, HEAD
Changes since 1.3: +3 -3 lines
File MIME type: text/plain 
 o cleanup comments (NO CODE CHANGES) in eesupp for protex
 o the "api reference" framework now builds documentation for:
     eesupp, pkg/generic_advdiff, and pkg/gmredi
 o remove mnc from the default gfd in pkg_groups pending
     further testing on systems where NetCDF is not installed
1 C $Header: /u/gcmpack/MITgcm/eesupp/inc/BAR2.h,v 1.3 2001/09/21 03:54:35 cnh Exp $
2 C $Name: $
3 C
4 CBOP
5 C !ROUTINE: BAR2.h
6 C !INTERFACE:
7 C include "BAR2.h"
8 C !DESCRIPTION:
9 C *==========================================================*
10 C | BAR2.h
11 C | o Globals used by BAR2 Fortran barrier routine.
12 C |==========================================================*
13 C | These variables support a simple Fortran shared memory
14 C | barrier routine. They do busy waiting, that is the
15 C | thread that is waiting sits in a tight loop reading
16 C | some memory location and waiting for all other threads.
17 C | On some systems this is sometimes a good method to use.
18 C | On the T3E memory is not shared so the routine should
19 C | use the T3E "eureka" barriers. On CRAY and NEC there are
20 C | hardware barriers that are accessed through a compiler
21 C | directives. Finally proper multi-threading compilers
22 C | support barrier compile directives - sometimes these
23 C | are good, sometimes they are lousy.
24 C | The barrier mechanism is used as follows
25 C | 1. In the single-threaded part of the code
26 C | CALL BAR2\_INIT
27 C | on CRAY, NEC this routine does nothing
28 C | on T3E there is no single-threaded code
29 C | but there may be barrier initialisation -
30 C | need to check.
31 C | 2. When we need to synchronize everybody just
32 C | CALL BAR2( myThid )
33 C | where myThid is myThreadId
34 C | on CRAY, NEC FBAR will just do C\$DIR BARRIER
35 C | or CALL BARRIER or the like.
36 C | on T3E FBAR does CALL BARRIER(...) or something
37 C | need to check this.
38 C *==========================================================*
39 CEOP
40 COMMON /BAR2_BUFFER_I/
41 & BAR2_level,
42 & BAR2_barrierCount,
43 & BAR2_spinsCount, BAR2_spinsMax, BAR2_spinsMin
44 INTEGER BAR2_level(cacheLineSize/4,MAX_NO_THREADS)
45 INTEGER BAR2_barrierCount(cacheLineSize/4,MAX_NO_THREADS)
46 INTEGER BAR2_spinsCount(cacheLineSize/4,MAX_NO_THREADS)
47 INTEGER BAR2_spinsMax(cacheLineSize/4,MAX_NO_THREADS)
48 INTEGER BAR2_spinsMin(cacheLineSize/4,MAX_NO_THREADS)
49
50 COMMON /BAR2_L/ bar2CollectStatistics
51 LOGICAL bar2CollectStatistics
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