Right now, they are 3 separate VecCreateGhost that are updated at the same time using 3 calls to VecGhostUpdateBegin and VecGhostUpdateEnd. I read that putting them into a single call might accelerate communication. The question what is the best way to do this?
Billy. Citando Lisandro Dalcin <dalcinl at gmail.com>: > On 7/4/07, billy at dem.uminho.pt <billy at dem.uminho.pt> wrote: > > Hi, > > > > I have a velocity vector (u,v,w) with 3 updates. Is there an efficient way > to > > interlace the 3 vectors into 1 update without creating a new data > structure? > > Look at VecStrideScatter, but not sure exactly what you need. Can > elaborate a bit more? What are x,u,v? Sepparate PETSc Vec's, or just a > Vec with consecutive entries? > > -- > Lisandro Dalc?n > --------------- > Centro Internacional de M?todos Computacionales en Ingenier?a (CIMEC) > Instituto de Desarrollo Tecnol?gico para la Industria Qu?mica (INTEC) > Consejo Nacional de Investigaciones Cient?ficas y T?cnicas (CONICET) > PTLC - G?emes 3450, (3000) Santa Fe, Argentina > Tel/Fax: +54-(0)342-451.1594 > >
