cheatsheet.tex

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\pdfinfo{
  /Title (GHC Memory Profiling Cheat Sheat)
  /Creator (pdflatex)
  /Producer (pdfTeX 1.40.0)
  /Author (Rogan Creswick)
  /Subject (Haskell)
  /Keywords (Haskell, ghc, memory, cheatsheet, quickreference, quickref)}

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\begin{document}
\raggedright
\footnotesize
\begin{multicols}{3}

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\begin{center}
     \Large{\underline{GHC Memory Profiling/Debugging}} \\
\end{center}

\section{First steps}
\subsection{Enable profiling}
\subsection{No build system}
\verb+ghc -prof+ \todo{is that right?}

\subsection{cabal}
Add GHC options:
\verb+ghc-options: -O2 -rtsopts -prof+

\subsection{cabal-dev}
Follow the ghc options steps for cabal, then, if you haven't been
building with profiling, clear the sandbox:
\verb+$ mv cabal-dev cabal-dev-no-prof+

Rebuild with profiling enabled:
\verb+$ cabal install --enable-library-profiling --enable-executable-profiling+

\subsection{Run with +RTS -RTS}
\verb|$ ./my-binary <params> +RTS -p -pomyProfile -RTS|

\section{RTS Options}
\verb|$ ./my-binary <params> +RTS -hc -RTS|
Generates a \verb|my-binary.hp| file, to use this, run hp2ps on it:
\verb|$ hp2ps -c my-binary.hp|
Then look at my-binary.ps.
\verb|-hc| Cost-center allocations.
\verb|-hy| Per-type allocations.
\verb|-po<name>| change the prefix of the output filenames
\section{Heap Profiles}

\end{multicols}
\end{document}