09-24-2007
Great job reborg!
The 4 CPUs and 2GB of memory make a huge difference over 1CPU and 512MB of memory.
I'll be interested to see the performance when the on-line users are close to 1000 / 30 minute like it was before the performance hit dropped us in the Google ranks.
Cheers and thanks again!
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LEARN ABOUT OSX
mpi_group_incl
MPI_Group_incl(3OpenMPI) MPI_Group_incl(3OpenMPI)
NAME
MPI_Group_incl - Produces a group by reordering an existing group and taking only listed members.
SYNTAX
C Syntax
#include <mpi.h>
int MPI_Group_incl(MPI_Group group, int n, int *ranks,
MPI_Group *newgroup)
Fortran Syntax
INCLUDE 'mpif.h'
MPI_GROUP_INCL(GROUP, N, RANKS, NEWGROUP, IERROR)
INTEGER GROUP, N, RANKS(*), NEWGROUP, IERROR
C++ Syntax
#include <mpi.h>
Group Group::Incl(int n, const int ranks[]) const
INPUT PARAMETERS
group Group (handle).
n Number of elements in array ranks (and size of newgroup)(integer).
ranks Ranks of processes in group to appear in newgroup (array of integers).
OUTPUT PARAMETERS
newgroup New group derived from above, in the order defined by ranks (handle).
IERROR Fortran only: Error status (integer).
DESCRIPTION
The function MPI_Group_incl creates a group group_out that consists of the n processes in group with ranks rank[0], ..., rank[n-1]; the
process with rank i in group_out is the process with rank ranks[i] in group. Each of the n elements of ranks must be a valid rank in group
and all elements must be distinct, or else the program is erroneous. If n = 0, then group_out is MPI_GROUP_EMPTY. This function can, for
instance, be used to reorder the elements of a group.
NOTE
This implementation does not currently check to ensure that there are no duplicates in the list of ranks.
ERRORS
Almost all MPI routines return an error value; C routines as the value of the function and Fortran routines in the last argument. C++ func-
tions do not return errors. If the default error handler is set to MPI::ERRORS_THROW_EXCEPTIONS, then on error the C++ exception mechanism
will be used to throw an MPI:Exception object.
Before the error value is returned, the current MPI error handler is called. By default, this error handler aborts the MPI job, except for
I/O function errors. The error handler may be changed with MPI_Comm_set_errhandler; the predefined error handler MPI_ERRORS_RETURN may be
used to cause error values to be returned. Note that MPI does not guarantee that an MPI program can continue past an error.
SEE ALSO
MPI_Group_compare
MPI_Group_range_incl
MPI_Group_free
Open MPI 1.2 September 2006 MPI_Group_incl(3OpenMPI)