petsc-3.7.1 2016-05-15
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# KSPPIPECR

Pipelined conjugate residual method This method has only a single non-blocking reduction per iteration, compared to 2 blocking for standard CR. The Many brnon-blocking reduction is overlapped by the matrix-vector product, but not the preconditioner application. Many br

See also KSPPIPECG, where the reduction is only overlapped with the matrix-vector product. Many br

Many br

### Notes

MPI configuration may be necessary for reductions to make asynchronous progress, which is important for performance of pipelined methods. Many brSee the FAQ on the PETSc website for details. Many br

### Contributed by

Pieter Ghysels, Universiteit Antwerpen, Intel Exascience lab Flanders Many br

### Reference

P. Ghysels and W. Vanroose, "Hiding global synchronization latency in the preconditioned Conjugate Gradient algorithm", Many brSubmitted to Parallel Computing, 2012. Many br

### See Also

KSPCreate(), KSPSetType(), KSPPIPECG, KSPGROPPCG, KSPPGMRES, KSPCG, KSPCGUseSingleReduction()

Level:intermediate
Location:src/ksp/ksp/impls/cr/pipecr/pipecr.c
Index of all KSP routines
Table of Contents for all manual pages
Index of all manual pages