On Fri, Dec 2, 2011 at 21:55, Dave Nystrom <Dave.Nystrom at tachyonlogic.com>wrote:
> When I run my code using our native, home grown cg solver with a > cholesky preconditioner, top reports for my current problem size memory > usage > of 567 MB. My current problem size is using a 2d grid that is 200x602 - > not > really all that big. And yet when I am running petsc solvers, top is > reporting 24 to 26 GB whether or not I am using cuda. > No, something is very wrong. It sounds like either you have a memory leak or you do a non-scalable gather. You can run with -malloc_log to see all the memory that PETSc has allocated. Or use a heap profiler. Some day we will write a better tool that tracks stack traces for large allocations only. -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.mcs.anl.gov/pipermail/petsc-dev/attachments/20111202/00a272d8/attachment.html>
