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| author | Andreas Klebinger <klebinger.andreas@gmx.at> | 2021-12-23 15:46:18 +0100 |
|---|---|---|
| committer | Marge Bot <ben+marge-bot@smart-cactus.org> | 2022-02-10 04:35:35 -0500 |
| commit | 48f257151f30f6b4d2f8b1a6ea4185ccd00ebd95 (patch) | |
| tree | c440e41d67f5c4d2f62deaed0b9dbb6991e06338 /docs | |
| parent | ac2d18a7353cd3ac1ba4b5993f2776fe0c5eedc9 (diff) | |
| download | haskell-48f257151f30f6b4d2f8b1a6ea4185ccd00ebd95.tar.gz | |
Add late cost centre support
This allows cost centres to be inserted after the core optimization
pipeline has run.
Diffstat (limited to 'docs')
| -rw-r--r-- | docs/users_guide/profiling.rst | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/docs/users_guide/profiling.rst b/docs/users_guide/profiling.rst index a1b1de819f..87509d6331 100644 --- a/docs/users_guide/profiling.rst +++ b/docs/users_guide/profiling.rst @@ -438,6 +438,19 @@ compiled program. or the :rts-flag:`-xc` RTS flag (:ref:`rts-options-debugging`) for more details. +.. ghc-flag:: -fprof-late-ccs + :shortdesc: Auto-add ``SCC``\\ s to all top level bindings *after* the optimizer has run. + :type: dynamic + :reverse: -fno-prof-auto + :category: + + Adds an automatic ``SCC`` annotation to all top level bindings late in the core pipeline after + the optimizer has run. This means these cost centres will not interfere with core-level optimizations + and the resulting profile will be closer to the performance profile of an optimized non-profiled + executable. + While the results of this are generally very good some of the compiler internal names + will leak into the profile. + .. ghc-flag:: -fprof-cafs :shortdesc: Auto-add ``SCC``\\ s to all CAFs :type: dynamic |