08-08-2012
You have already started !!
All you need is to have patience - This is not a subject to learn in a day !!
Just keep looking and understand what problems other's are facing and try to come up with the solutions....That's what I am doing...The best way to learn...!!
Try to take some assignments on your own by trying some simple programs which you must have done in C, If you are working in any organisation then think of some task which could be automated with the shell.But be sure not to automate every task !! Otherwise your manager may think of your release :-) ( My personal experiance )
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LEARN ABOUT REDHAT
pvm_reg_rm
REG_RM(3PVM) PVM Version 3.4 REG_RM(3PVM)
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 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 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)