Intel® oneAPI Math Kernel Library Developer Reference - Fortran
Finds the collaborators of a process.
call pmpcol( myproc, nprocs, iil, needil, neediu, pmyils, pmyius, colbrt, frstcl, lastcl )
Using the output from pmpim2 and given the information on eigenvalue clusters, pmpcol finds the collaborators of myproc.
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INTEGER
The processor number, 0 ≤myproc < nprocs.
INTEGER
The total number of processors available.
INTEGER
The index of the leftmost eigenvalue in the eigenvalue cluster.
INTEGER
The leftmost position in the eigenvalue cluster needed by myproc.
INTEGER
The rightmost position in the eigenvalue cluster needed by myproc.
INTEGER array
For each processor p, 0 < p≤nprocs, pmyils(p) is the index of the first eigenvalue in the eigenvalue cluster to be computed.
pmyils(p) equals zero if p stays idle.
INTEGER array
For each processor p, pmyius(p) is the index of the last eigenvalue in the eigenvalue cluster to be computed.
pmyius(p) equals zero if p stays idle.
LOGICAL
Equals .TRUE. if myproc collaborates.
INTEGER
First and last collaborator of myproc .
myproc collaborates with:
frstcl, ..., myproc-1, myproc+1, ...,lastcl
If myproc = frstcl, there are no collaborators on the left. If myproc = lastcl, there are no collaborators on the right.
If frstcl = 0 and lastcl = nprocs-1, then myproc collaborates with everybody