NAME

       pvm_reg_rm - Register task as PVM resource manager.

SYNOPSIS

       C    #include <pvmsdpro.h>

            int cc = pvm_reg_rm( struct pvmhostinfo **hip )
            struct pvmhostinfo {
                 int  hi_tid;
                 char *hi_name;
                 char *hi_arch;
                 int  hi_speed;
            };

       Fortran   Not Available

PARAMETERS

       hostp  Returns  pointer  to  a  pvmhostinfo structure which contains information about the
              master host.

DESCRIPTION

       Registers the calling task as a PVM task and slave host manager.  This means it intercepts
       certain  libpvm  calls  from other tasks in order to have a say in scheduling policy.  The
       resource manager will asynchronously receive messages from tasks containing  requests  for
       service, as well as messages from pvmds notifying it of system failures.

       Before  you  start  using this function, be warned that it's not a trivial thing, i.e. you
       can't just call it to turn off the default round-robin task assignment.  Rather, it allows
       you to write your own resource manager and hook it to PVM.

       To  understand  what  the following messages mean, you should refer to the PVM source code
       and/or user guide section on implementation; There's just too much to say about them.

       When one of the following libpvm functions is called in a task with resource manager  set,
       the given message tag is sent to to resource manager.

           Libpvm call           RM message        Normal message
           pvm_addhosts()        SM_ADDHOST        TM_ADDHOST
           pvm_config()          SM_CONFIG         TM_CONFIG
           pvm_delhosts()        SM_DELHOST        TM_DELHOST
           pvm_notify()          SM_NOTIFY         TM_NOTIFY
           pvm_spawn()           SM_SPAWN          TM_SPAWN
           pvm_tasks()           SM_TASK           TM_TASK
           pvm_reg_rm()          SM_SCHED          TM_SCHED

       The  resource  manager  must  in  turn compose the following messages and send them to the
       pvmds:

           RM message        Normal message
           SM_EXEC           DM_EXEC
           SM_EXECACK        DM_EXECACK
           SM_ADD            DM_ADD
           SM_ADDACK         DM_ADDACK
           SM_HANDOFF        (none - change of resource manager)

       The following messages are sent asynchronously to the resource manager by the system:

           RM message        Meaning
           SM_TASKX          notify of task exit/fail
           SM_HOSTX          notify of host delete/fail

       The resource manager task must use pvm_setopt(PvmResvTids, 1) to  allow  sending  reserved
       messages.   Messages  should be packed using encoding PvmDataDefault to ensure they can be
       unpacked anywhere in the system.

       pvm_reg_rm() returns PvmOk when successful.

SEE ALSO

       pvm_addhosts(3PVM),      pvm_config(3PVM),      pvm_delhosts(3PVM),      pvm_notify(3PVM),
       pvm_spawn(3PVM), pvm_tasks(3PVM)

                                          4 March, 1994                              REG_RM(3PVM)