#10739: Resuscitate the humble ticky-ticky profiler -------------------------------------+------------------------------------- Reporter: bgamari | Owner: (none) Type: task | Status: new Priority: normal | Milestone: Component: Profiling | Version: 7.10.2 Resolution: | Keywords: Operating System: Unknown/Multiple | Architecture: | Unknown/Multiple Type of failure: None/Unknown | Test Case: Blocked By: | Blocking: Related Tickets: #8308, #9405 | Differential Rev(s): Phab:D5392 Wiki Page: | -------------------------------------+------------------------------------- Comment (by sgraf): Just for future references: I think at least `ENT_DYN_THK_MANY_ctr` and `UPDF_PUSHED_ctr` are flawed. I discovered this while inspecting improvements in `queens` to due `-fstg-lift-lams`. With `-fno-stg-lift-lams`, these counters go down, which should not be the case since we don't ever destroy sharing or introduce any kind of additional thunks (like partial applications). On the other hand, this could happen because we no longer can use one of the generic apply functions (like `stg_ap_2`) after lifting, which AFAIK aren't represented at all in ticky numbers. Either way: Fix these counters by - Not using generic apply functions with `-ticky` - Identify and fix accidental misascription like in Phab:D5392 -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/10739#comment:8 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler