On Thu, 2008-04-24 at 16:51 +0200, Paolo Bonzini wrote: > >> (The testcase is 400k lines of preprocessed Fortran code, 16M is size, > >> available here: > >> http://www.pci.unizh.ch/vandevondele/tmp/all_cp2k_gfortran.f90.gz) > >> > >> > > Thanks, I'll check it. > > Vlad, I think you should also try to understand what does trunk do with > global (and without local allocation) at -O0. That will give a > measure of the benefit from Peter's patches for conflict graph building.
I took a patch from Ken/Steven that disabled local_alloc and instead runs global_alloc() at -O0 and summing up all of the bit matrix allocation info we emit into the *.greg output, the new conflict builder saves a lot of space compared to the old square bit matrix (almost 20x less space). Here's the accumulated data for the test case above: compressed upper triangular: 431210251 bits, 53902848 bytes upper triangular: 4264666581 bits, 533084851 bytes square: 8531372796 bits, 1066423618 bytes Peter