--- MITgcm/eesupp/inc/GLOBAL_MAX.h 2001/05/29 14:01:35 1.2 +++ MITgcm/eesupp/inc/GLOBAL_MAX.h 2001/09/21 03:54:35 1.3 @@ -1,28 +1,33 @@ -C $Header: /home/ubuntu/mnt/e9_copy/MITgcm/eesupp/inc/GLOBAL_MAX.h,v 1.2 2001/05/29 14:01:35 adcroft Exp $ +C $Header: /home/ubuntu/mnt/e9_copy/MITgcm/eesupp/inc/GLOBAL_MAX.h,v 1.3 2001/09/21 03:54:35 cnh Exp $ C $Name: $ -C -C /==========================================================\ -C | GLOBAL_MAX.h | -C | o Globals used by Fortran global max routine. | -C |==========================================================| -C | The global max shared memory scheme uses global heap data| -C | structures (.i.e COMMON blocks ). Each thread writes to | -C | an its own element of the shared memory array and then | -C | one thread reads all the entries and maxs them. The max | -C | result is then read by all threads. | -C | Remember - you are working with regions of memory that | -C | are being updated concurrently by different threads. | -C | What happens, when it happens and who gets to see what | -C | happens at what stage depends on the computer systems | -C | memory model. Every computer has a different memory model| -C | and they are never simple. In all current platforms it is| -C | possible for one thread to see events happening in a | -C | different order from the order they are written in the | -C | code. | -C | Unless you understand this it is not a good idea to | -C | make modifications te way these header files are setup or| -C | the way the global sum routines work. | -C \==========================================================/ +CBOP +C !ROUTINE: GLOBAL_MAX.h +C !INTERFACE: +C include "GLOBAL_MAX.h" +C !DESCRIPTION: +C *==========================================================* +C | GLOBAL_MAX.h +C | o Globals used by Fortran global max routine. +C *==========================================================* +C | The global max shared memory scheme uses global heap data +C | structures (.i.e COMMON blocks ). Each thread writes to +C | an its own element of the shared memory array and then +C | one thread reads all the entries and maxs them. The max +C | result is then read by all threads. +C | Remember - you are working with regions of memory that +C | are being updated concurrently by different threads. +C | What happens, when it happens and who gets to see what +C | happens at what stage depends on the computer systems +C | memory model. Every computer has a different memory model +C | and they are never simple. In all current platforms it is +C | possible for one thread to see events happening in a +C | different order from the order they are written in the +C | code. +C | Unless you understand this it is not a good idea to +C | make modifications te way these header files are setup or +C | the way the global sum routines work. +C *==========================================================* +CEOP COMMON / GMAX_COMMON_R8 / phiGMRL Real*8 phiGMRL(lShare8, MAX_NO_THREADS )