CONFIG(3PVM) PVM Version 3.4 CONFIG(3PVM)NAMEpvm_config - Returns information about the present virtual machine con‐
figuration.
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 infor‐
mation about each host including its pvmd task ID, name, archi‐
tecture, 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 configu‐
ration 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 ALSOpvm_tasks(3PVM)
31 August, 1994 CONFIG(3PVM)
