-
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. Value-adds: - you can now restrict a heap profile to certain retainer sets, but still display by cost centre (or type, or closure or whatever). - 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.
Simon Marlow authoredProfiling 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. Value-adds: - you can now restrict a heap profile to certain retainer sets, but still display by cost centre (or type, or closure or whatever). - 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.
Loading