bionic (3) pvm_config.3PVM.gz

NAME

       pvm_config - Returns information about the present virtual machine configuration.

SYNOPSIS

       C    int info = pvm_config( int *nhost, int *narch, struct pvmhostinfo **hostp )
            struct pvmhostinfo {
                 int  hi_tid;
                 char *hi_name;
                 char *hi_arch;
                 int  hi_speed;
            };

       Fortran   call pvmfconfig( nhost, narch, dtid, name, arch, speed, info )

PARAMETERS

       nhost   Integer returning the number of hosts (pvmds) in the virtual machine.

       narch   Integer returning the number of different data formats being used.

       hostp   Returns pointer to an array of structures which contain information about each host including its
               pvmd task ID, name, architecture, and relative speed.

       dtid    Integer returning pvmd task ID for host

       name    Character string returning name of host

       arch    Character string returning architecture name of host

       speed   Integer returning relative speed of host. Default value is 1000.

       info    Integer status code returned by the routine.  Values less than zero indicate an error.

DESCRIPTION

       The routine pvm_config returns information about the present virtual machine. The information returned is
       similar to that available from the console command conf.

       The  C  function  returns  information about the entire virtual machine in one call. The Fortran function
       returns information about one host per call and cycles through all the hosts.   Thus,  if  pvmfconfig  is
       called nhost times, the entire virtual machine will be represented.

       Note  that in C the hostp array is allocated and owned by libpvm.  It is automatically freed or reused on
       the next call to pvm_config.

       Note that in Fortran the reported value of nhost and the  host configuration  do  not  change  until  the
       function  resets  at the end of a complete cycle.  The user can reset pvmfconfig() at any time by calling
       it with nhost = -1.

       If pvm_config is successful, info will be 0.  If some error occurs then info will be < 0.

EXAMPLES

       C:
            struct pvmhostinfo *hostp;
            int i, nhost, narch;

            info = pvm_config( &nhost, &narch, &hostp );
            for (i = 0; i < nhost; i++)
                 printf("%s\n", hostp[i].hi_name);

       Fortran:
            Do i=1, NHOST
              CALL PVMFCONFIG( NHOST,NARCH,DTID(i),HOST(i),ARCH(i),SPEED(i),INFO )
            Enddo

ERRORS

       The following error condition can be returned by pvm_config

       PvmSysErr
              pvmd not responding.

SEE ALSO

       pvm_tasks(3PVM)

                                                 31 August, 1994                                    CONFIG(3PVM)