On 11/22/06, Yaron Kretchmer <yaronkretchmer at gmail.com> wrote: > Thanks Matt. > > And Vec sits on top of BLAS/MPI ?
Everything is on top of MPI. Vec can use BLAS. > How are Vec-Vec operators (VecAXPBY for instance) and Mat-Mat operators > (MatMatMult) performed? There are lots of implementations: BLAS, Fortran kernels, etc. For the Mat stuff, I think block matrices are BLAS, and the other stuff is jsut hand coded. Matt > > Yaron > > > On 11/22/06, Matthew Knepley <knepley at gmail.com> wrote: > > There is a classic slides in all the tutorials about control flow, but > > it is really simple: > > > > - Mat uses Vec > > - PC uses (Mat, Vec) > > - KSP use (PC, Mat, Vec) > > - SNES uses (KSP, PC, Mat, Vec) > > - TS uses (SNES, KSP, PC, Mat, Vec) > > > > Very linear. > > > > Matt > > > > On 11/21/06, Yaron Kretchmer <yaronkretchmer at gmail.com> wrote: > > > Hi all > > > I'd like to understand the class/object hierarchy of Petsc ( i.e. KSP > uses a > > > MAT , which uses a VEC etc. etc.)- other than digging through the code, > how > > > can i do this? > > > > > > Thanks > > > Yaron > > > > > > > > > -- > > "Failure has a thousand explanations. Success doesn't need one" -- Sir > > Alec Guiness > > > > > > -- "Failure has a thousand explanations. Success doesn't need one" -- Sir Alec Guiness
