> El 15 jul 2016, a las 19:12, Simon Burton <[email protected]> escribió: > > Hi, > > just like this? > ./ex3 -eps_nev 1 -eps_type power -n 65536 -info > > I still see: > [0] STSetUp(): Setting up new ST > > and that's when memory usage reaches to 192GB and the machine can't take it. > > I don't understand why the default behaviour creates a spectral transform > object that then needs so much memory. > > thanks, > > Simon.
The default spectral transformation (STSHIFT) will allocate just one vector. At which exact point are you seeing that it allocates a bunch of vectors? Is this the unmodified ex3.c? Or did you change anything like EPSSetOperators(eps,A,B) ? Do you get the same behaviour with the original ex3 with the same problem size? Do you have the same problem with a smaller problem? (half size, say) Jose
