1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
|
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML3.2 EN">
<HTML>
<HEAD> <link rel="canonical" href="http://www.mcs.anl.gov/petsc/petsc-current/docs/manualpages/KSP/KSPPIPECR.html" />
<META NAME="GENERATOR" CONTENT="DOCTEXT">
<TITLE>KSPPIPECR</TITLE>
</HEAD>
<BODY BGCOLOR="FFFFFF">
<div id="version" align=right><b>petsc-3.7.5 2017-01-01</b></div>
<div id="bugreport" align=right><a href="mailto:petsc-maint@mcs.anl.gov?subject=Typo or Error in Documentation &body=Please describe the typo or error in the documentation: petsc-3.7.5 v3.7.5 docs/manualpages/KSP/KSPPIPECR.html "><small>Report Typos and Errors</small></a></div>
<A NAME="KSPPIPECR"><H1>KSPPIPECR</H1></A>
Pipelined conjugate residual method This method has only a single non-blocking reduction per iteration, compared to 2 blocking for standard CR. The
non-blocking reduction is overlapped by the matrix-vector product, but not the preconditioner application.
<P>
See also <A HREF="../KSP/KSPPIPECG.html#KSPPIPECG">KSPPIPECG</A>, where the reduction is only overlapped with the matrix-vector product.
<P>
<P>
<H3><FONT COLOR="#CC3333">Notes</FONT></H3>
MPI configuration may be necessary for reductions to make asynchronous progress, which is important for performance of pipelined methods.
See the FAQ on the PETSc website for details.
<P>
<H3><FONT COLOR="#CC3333">Contributed by</FONT></H3>
Pieter Ghysels, Universiteit Antwerpen, Intel Exascience lab Flanders
<P>
<H3><FONT COLOR="#CC3333">Reference</FONT></H3>
P. Ghysels and W. Vanroose, "Hiding global synchronization latency in the preconditioned Conjugate Gradient algorithm",
Submitted to Parallel Computing, 2012.
<P>
<H3><FONT COLOR="#CC3333">See Also</FONT></H3>
<A HREF="../KSP/KSPCreate.html#KSPCreate">KSPCreate</A>(), <A HREF="../KSP/KSPSetType.html#KSPSetType">KSPSetType</A>(), <A HREF="../KSP/KSPPIPECG.html#KSPPIPECG">KSPPIPECG</A>, <A HREF="../KSP/KSPGROPPCG.html#KSPGROPPCG">KSPGROPPCG</A>, <A HREF="../KSP/KSPPGMRES.html#KSPPGMRES">KSPPGMRES</A>, <A HREF="../KSP/KSPCG.html#KSPCG">KSPCG</A>, <A HREF="../KSP/KSPCGUseSingleReduction.html#KSPCGUseSingleReduction">KSPCGUseSingleReduction</A>()
<BR><P><B><P><B><FONT COLOR="#CC3333">Level:</FONT></B>intermediate
<BR><FONT COLOR="#CC3333">Location:</FONT></B><A HREF="../../../src/ksp/ksp/impls/cr/pipecr/pipecr.c.html#KSPPIPECR">src/ksp/ksp/impls/cr/pipecr/pipecr.c</A>
<BR><A HREF="./index.html">Index of all KSP routines</A>
<BR><A HREF="../../index.html">Table of Contents for all manual pages</A>
<BR><A HREF="../singleindex.html">Index of all manual pages</A>
</BODY></HTML>
|
