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| author | Ben Gamari <ben@smart-cactus.org> | 2021-09-16 10:20:04 -0400 |
|---|---|---|
| committer | Marge Bot <ben+marge-bot@smart-cactus.org> | 2021-09-18 12:04:06 -0400 |
| commit | 446ca8b9897d3b76b35dc2bd593592d2413b9620 (patch) | |
| tree | 73b5e059a7e698ae9d1a3966ca12925d596f2262 /docs | |
| parent | 1350c220855ed31acc0f23bc7a547eff389711c8 (diff) | |
| download | haskell-446ca8b9897d3b76b35dc2bd593592d2413b9620.tar.gz | |
users-guide: Improve documentation of ticky events
Diffstat (limited to 'docs')
| -rw-r--r-- | docs/users_guide/eventlog-formats.rst | 2 | ||||
| -rw-r--r-- | docs/users_guide/profiling.rst | 9 | ||||
| -rw-r--r-- | docs/users_guide/runtime_control.rst | 3 |
3 files changed, 13 insertions, 1 deletions
diff --git a/docs/users_guide/eventlog-formats.rst b/docs/users_guide/eventlog-formats.rst index 6e6c71e1f3..b8ad8f32d9 100644 --- a/docs/users_guide/eventlog-formats.rst +++ b/docs/users_guide/eventlog-formats.rst @@ -901,6 +901,8 @@ heap. Describes the occupancy of the *blk_sz* sub-heap. +.. _ticky-event-format: + Ticky counters ~~~~~~~~~~~~~~ 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. diff --git a/docs/users_guide/runtime_control.rst b/docs/users_guide/runtime_control.rst index a10a283e52..8f8b9b3fcb 100644 --- a/docs/users_guide/runtime_control.rst +++ b/docs/users_guide/runtime_control.rst @@ -1240,7 +1240,8 @@ When the program is linked with the :ghc-flag:`-eventlog` option - ``f`` — parallel sparks (fully accurate). Disabled by default. - - ``T`` — :ghc-flag:`ticky-ticky profiler <-ticky>` events. Disabled by + - ``T`` — :ghc-flag:`ticky-ticky profiler <-ticky>` events + (see :ref:`ticky-event-format` for details). Disabled by default. - ``u`` — user events. These are events emitted from Haskell code using |