REG_RM(3PVM) PVM Version 3.4 REG_RM(3PVM)NAMEpvm_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 infor‐
mation 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 asyn‐
chronously 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 man‐
ager 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 man‐
ager.
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 ALSOpvm_addhosts(3PVM), pvm_config(3PVM), pvm_delhosts(3PVM),
pvm_notify(3PVM), pvm_spawn(3PVM), pvm_tasks(3PVM)
4 March, 1994 REG_RM(3PVM)
