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)