Have any of the modules loaded changed? Or the shared libraries that are in any of the modules?
> On Feb 21, 2022, at 5:38 PM, Adrian Croucher <a.crouc...@auckland.ac.nz> > wrote: > > hi, > > We have our PETSc-based code compiled on a Cray XC-50 machine, and it has > just recently started running about 2.5 times slower on there. Neither the > code nor PETSc has been recompiled lately. > > Turning the PETSc logging on, it appears to be spending more time on I/O than > it used to. > > The cluster admins have suggested we rebuild with the Cray "perftools" module > loaded to get profiling info. It's a slight hassle to rebuild everything, so > I wondered, would this actually tell us anything that we don't already know > from the PETSc logs? > > - Adrian > > -- > Dr Adrian Croucher > Senior Research Fellow > Department of Engineering Science > University of Auckland, New Zealand > email: a.crouc...@auckland.ac.nz > tel: +64 (0)9 923 4611 >
