Skip to content
  • Simon Marlow's avatar
    [project @ 2001-11-26 16:54:21 by simonmar] · dbef766c
    Simon Marlow authored
    Profiling cleanup.
    This commit eliminates some duplication in the various heap profiling
    subsystems, and generally centralises much of the machinery.  The key
    concept is the separation of a heap *census* (which is now done in one
    place only instead of three) from the calculation of retainer sets.
    Previously the retainer profiling code also did a heap census on the
    fly, and lag-drag-void profiling had its own census machinery.
       - you can now restrict a heap profile to certain retainer sets,
         but still display by cost centre (or type, or closure or
       - I've added an option to restrict the maximum retainer set size
         (+RTS -R<size>, defaulting to 8).
       - I've cleaned up the heap profiling options at the request of
         Simon PJ.  See the help text for details.  The new scheme
         is backwards compatible with the old.
       - I've removed some odd bits of LDV or retainer profiling-specific
         code from various parts of the system.
       - the time taken doing heap censuses (and retainer set calculation)
         is now accurately reported by the RTS when you say +RTS -Sstderr.
    Still to come:
       - restricting a profile to a particular biography
         (lag/drag/void/use).  This requires keeping old heap censuses
         around, but the infrastructure is now in place to do this.