[project @ 2001-11-26 16:54:21 by simonmar]
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.
24 files changed: