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Diffstat (limited to 'docs/users_guide/profiling.rst')
| -rw-r--r-- | docs/users_guide/profiling.rst | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/docs/users_guide/profiling.rst b/docs/users_guide/profiling.rst index 4faa437bd8..dbe0da06cf 100644 --- a/docs/users_guide/profiling.rst +++ b/docs/users_guide/profiling.rst @@ -1713,12 +1713,21 @@ Using “ticky-ticky” profiling (for implementors) Track allocations of dynamic thunks. +GHC's ticky-ticky profiler provides a low-level facility for tracking +entry and allocation counts of particular individual closures. Because ticky-ticky profiling requires a certain familiarity with GHC internals, we have moved the documentation to the GHC developers wiki. Take a look at its :ghc-wiki:`overview of the profiling options <commentary/profiling>`, which includes a link to the ticky-ticky profiling page. +Note that ticky-ticky samples can be emitted in two formats: the eventlog, +using the :rts-flag:`-lT <-l ⟨flags⟩>` event type, and a plain text +summary format, using the :rts-flag:`-r ⟨file⟩` option. The former has the +advantage of being able to resolve dynamic behaviors over the program's +lifetime. See :ref:`ticky-event-format` for details on the event types +reported. + .. [1] :ghc-flag:`-fprof-auto` was known as ``-auto-all`` prior to GHC 7.4.1. |