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pvm_spawn_independent(1) Scilab function pvm_spawn_independent(1)
NAME
pvm_spawn_independent - Starts new PVM processes.
CALLING SEQUENCE
[tids, numt] = pvm_spawn_independent(task, ntask, [where])
PARAMETERS
task:
string, which is the executable file name of the PVM process to be
started. The executable must already reside on the host on which it is
to be started. The name may be a file in the PVM search path or an
absolute path. The default PVM search path is
$HOME/pvm3/bin/$PVM_ARCH/ .
ntask:
integer, specifying the number of copies of the scilab script to start.
where: string (optional, default value is NULL), can be a host name such as
``tequila.ens-lyon.fr'' or a PVM architecture class such as
``SUN4''.
numt:
integer, the actual number of tasks started. Values less than zero
indicate a system error.
tids:
row of integers, array of the tids of the PVM processes started by this
pvm_spawn_independent call.
DESCRIPTION
pvm_spawn_independent starts ntask copies of the executable named task. On
systems that support environment, spawn passes selected variables from
parent environment to children tasks. If set, the envar PVM_EXPORT is
passed. If PVM_EXPORT contains other names (separated by ':') they will be
passed too. This is useful for e.g.:
setenv DISPLAY myworkstation:0.0
setenv MYSTERYVAR 13
setenv PVM_EXPORT DISPLAY:MYSTERYVAR
The hosts on which the PVM processes are started are determined by the
where arguments. On return the array tids contains the PVM task identifiers
for each process started.
If pvm_spawn_independent starts one or more tasks, numt will be the actual
number of tasks started. If a system error occurs then numt will be < 0.
If numt is less than ntask then some executables have failed to start and
the user should check the last ntask - numt locations in the tids array
which will contain error codes (see below for meaning). The first numt
tids in the array are always valid.
When the argument where is set to NULL a heuristic (round-robin assignment)
is used to distribute the ntask processes across the virtual machine.
In the special case where a multiprocessor is specified by where,
pvm_spawn_independent will start all ntask copies on this single machine
using the vendor's underlying routines.
EXAMPLE
[tids, numt] = pvm_spawn_independent("a.out",2,"loop")
SEE ALSO
pvm, pwm_spawn
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