Hi Dominik, Dominik Szczerba wrote: > I have noticed already a longer while ago: setting up PETSc with the > Intel compilers (--with-cc=icc --with-cxx=icpc) takes an order of > magnitude longer than with the native GNU. The step taking most of the > time is configuring mpich. I have tried to configure mpich separately > and indeed, with gnu it is a breeze, with intel 10x slower. In both > cases, linux both 32 and 64 bit, Ubuntu 9.04 and debian testing. Intel > compilers 10.x and 11.x. > > I just wanted to ask opinion if anybody has similar observations and/or > finds using intel worthwhile at all.
On itanium machines intel compilers produce much faster code compared to gnu-compilers. On other machines I did not notice a big speed difference, but I think intel compilers produce slightly faster code as well. Cheers, ando -- /"\ \ / ASCII Ribbon X against HTML email / \ -------------- next part -------------- A non-text attachment was scrubbed... Name: signature.asc Type: application/pgp-signature Size: 315 bytes Desc: OpenPGP digital signature URL: <http://lists.mcs.anl.gov/pipermail/petsc-users/attachments/20091027/dc05c456/attachment.pgp>
