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add notes on full profiling

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Joey Hess 2014-01-05 19:53:41 -04:00
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doc/ekg.mdwn
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@ -12,3 +12,20 @@ Note that since only one process can open port 4242 at a time, running
more than one git-annex process with EKG support at the same time can more than one git-annex process with EKG support at the same time can
result in some "resource busy (Address already in use)" messages -- but result in some "resource busy (Address already in use)" messages -- but
git-annex will continue to work. git-annex will continue to work.
----
## full profiling
For the really tricky memory leaks, here's how to make a profiling build of
git-annex.
1. `cabal configure` with only the flags you really need
2. `cabal build --ghc-options="-prof -auto-all -caf-all"`
This will probably fail due to some missing profiling libraries.
You have to get the profiling versions of all needed haskell libraries
installed somehow.
3. Run git-annex with the special flags `+RTS -hc -p`
4. Reproduce the memory leak problem.
5. If the assistant was run, stop it.
6. `hp2ps -e8in -c git-annex.hp` to generate a .ps graph of memory usage.