pvm_reg_rm(3) - Linux man page

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.

pvm_reg_rm(3) - Linux man page

Name

Synopsis

Parameters

Description

See Also