On Aug 5, 2011, at 11:47 AM, Barry Smith wrote: > > On Aug 5, 2011, at 10:43 AM, Ataollah Mesgarnejad wrote: > >> Dear all, >> >> I use KSPSetInitialGuessNonzero for my KSP solver and it works perfectly. >> But when I restart my computations (I read petsc binaries and set up my >> fields) the first KSP solve takes forever. I guess my question is: is there >> a way to set the initial guess for KSP back to where it was before >> termination (i.e. write the KSP out) or set it to be a predefined vector? >> >> Thanks, >> Ata > > There isn't a way automatically with the KSP. But why not save the last > solution to the binary file and read it in at restart and put it into x > before your first new KSPSolve? >
> Barry > Ok so if I get it correctly I need to pass ierr = KSPSolve(ksp,x ,u);CHKERRQ(ierr); and set "x" to be the last thing I had for "u"? Thanks, Ata -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.mcs.anl.gov/pipermail/petsc-users/attachments/20110805/010158ed/attachment.htm>
