/[MITgcm]/MITgcm/eesupp/inc/GLOBAL_MAX.h
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Revision 1.5 - (hide annotations) (download)
Wed Jun 10 03:45:11 2009 UTC (14 years, 10 months ago) by jmc
Branch: MAIN
CVS Tags: checkpoint62v, checkpoint62u, checkpoint62t, checkpoint65z, checkpoint65x, checkpoint65y, checkpoint65r, checkpoint65s, checkpoint65p, checkpoint65q, checkpoint65v, checkpoint65w, checkpoint65t, checkpoint65u, checkpoint65j, checkpoint65k, checkpoint65h, checkpoint65i, checkpoint65n, checkpoint65l, checkpoint65m, checkpoint65b, checkpoint65c, checkpoint65a, checkpoint65f, checkpoint65g, checkpoint65d, checkpoint65e, checkpoint62c, checkpoint62s, checkpoint62r, checkpoint62q, checkpoint62p, checkpoint62a, checkpoint62g, checkpoint62f, checkpoint62e, checkpoint62d, checkpoint62k, checkpoint62j, checkpoint62i, checkpoint62h, checkpoint62o, checkpoint62n, checkpoint62m, checkpoint62l, checkpoint62w, checkpoint62z, checkpoint62y, checkpoint62x, checkpoint63g, checkpoint64, checkpoint65, checkpoint62, checkpoint63, checkpoint66g, checkpoint66f, checkpoint66e, checkpoint66d, checkpoint66c, checkpoint66b, checkpoint66a, checkpoint66o, checkpoint66n, checkpoint66m, checkpoint66l, checkpoint66k, checkpoint66j, checkpoint66i, checkpoint66h, checkpoint63p, checkpoint63q, checkpoint63r, checkpoint63s, checkpoint63l, checkpoint63m, checkpoint63n, checkpoint63o, checkpoint63h, checkpoint63i, checkpoint63j, checkpoint63k, checkpoint63d, checkpoint63e, checkpoint63f, checkpoint63a, checkpoint63b, checkpoint63c, checkpoint65o, checkpoint62b, checkpoint64y, checkpoint64x, checkpoint64z, checkpoint64q, checkpoint64p, checkpoint64s, checkpoint64r, checkpoint64u, checkpoint64t, checkpoint64w, checkpoint64v, checkpoint64i, checkpoint64h, checkpoint64k, checkpoint64j, checkpoint64m, checkpoint64l, checkpoint64o, checkpoint64n, checkpoint64a, checkpoint64c, checkpoint64b, checkpoint64e, checkpoint64d, checkpoint64g, checkpoint64f, checkpoint61q, checkpoint61v, checkpoint61w, checkpoint61t, checkpoint61u, checkpoint61r, checkpoint61s, checkpoint61p, checkpoint61z, checkpoint61x, checkpoint61y, HEAD
Changes since 1.4: +25 -25 lines
File MIME type: text/plain 
- change name of buffer (R4,R8 instead of RS,RL) to match buffer type
- add one more element to buffer (start at index 0) for GLOB_MAX/SUM output
1 jmc 1.5 C $Header: /u/gcmpack/MITgcm/eesupp/inc/GLOBAL_MAX.h,v 1.4 2004/03/27 03:51:50 edhill Exp $
2 cnh 1.3 C $Name: $
3     CBOP
4     C !ROUTINE: GLOBAL_MAX.h
5     C !INTERFACE:
6     C include "GLOBAL_MAX.h"
7     C !DESCRIPTION:
8     C *==========================================================*
9 jmc 1.5 C | GLOBAL\_MAX.h
10     C | o Globals used by Fortran global max routine.
11 cnh 1.3 C *==========================================================*
12 jmc 1.5 C | The global max shared memory scheme uses global heap data
13     C | structures (.i.e COMMON blocks ). Each thread writes to
14     C | an its own element of the shared memory array and then
15     C | one thread reads all the entries and maxs them. The max
16     C | result is then read by all threads.
17     C | Remember - you are working with regions of memory that
18     C | are being updated concurrently by different threads.
19     C | What happens, when it happens and who gets to see what
20     C | happens at what stage depends on the computer systems
21     C | memory model. Every computer has a different memory model
22     C | and they are never simple. In all current platforms it is
23     C | possible for one thread to see events happening in a
24     C | different order from the order they are written in the
25     C | code.
26     C | Unless you understand this it is not a good idea to
27     C | make modifications te way these header files are setup or
28     C | the way the global max routines work.
29 cnh 1.3 C *==========================================================*
30     CEOP
31 jmc 1.5 COMMON / GMAX_COMMON_R8 / phiGMR8
32     Real*8 phiGMR8(lShare8, 0:MAX_NO_THREADS )
33 adcroft 1.2
34 jmc 1.5 COMMON / GMAX_COMMON_R4 / phiGMR4
35     Real*4 phiGMR4(lShare4, 0:MAX_NO_THREADS )
36 adcroft 1.2
37     COMMON / GMAX_COMMON_I / phiGMI
38 jmc 1.5 INTEGER phiGMI (lShare4, 0:MAX_NO_THREADS )
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