> On Dec 16, 2016, at 8:45 AM, Aurelien Ponte <[email protected]> wrote: > > Hi, > > I am inverting a 3D elliptical operator with petsc4py (3.4, petsc is 3.4.5) > installed via conda: https://anaconda.org/sed-pro-inria/petsc4py > > I get systematic crashes (out of memory or bus error) when I reach a certain > > grid size (512 x 256 x 100) even though I maintain the same number of grid > points per processor. > I used up to 256 procs and got similar crashes. > > Browsing the internet indicates that using 64-bit-indices may be cure for > such pb.
Yes, this is the problem. > It will take however a significant amount of effort for me to install > petsc4py and petsc with this option. Hopefully another user knows an easy way to install petsc4py to use 64 bit indices > I do not even know how to check whether > my current versions of petsc4py and petsc was installed with it. It was not. > > Would you have any tips or recommendation about how I could address the issue > ? > > Thanks, > > Aurelien > > > -- > Aurélien Ponte > Tel: (+33) 2 98 22 40 73 > Fax: (+33) 2 98 22 44 96 > UMR 6523, IFREMER > ZI de la Pointe du Diable > CS 10070 > 29280 Plouzané >
