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Daniele Cono D'Elia edited experim.tex
over 8 years ago
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For {\tt b-trees} - the only benchmark in our suite showing a recursive pattern - we insert an OSR point in the body of the method that accounts for the largest {\em self} execution time of the program. Such an OSR point might be useful to trigger recompilation of the code at a higher degree of optimization, or to enable some form of dynamic optimization (for instance, in a recursive search algorithm we might want to inline the comparator method provided by the user at the call).
\paragraph{Overhead of OSR transitions}
In this [...]
\begin{table}
\begin{tabular}{ |c|c|c|c| }
\hline
Benchmark & Fired OSR transitions & Live values & Avg time (ns) \\
\hline
\hline
b-trees & 605377887 & 2 & 3.057 \\
\hline
b-trees-large & 2689946975 & 2 & 2.986 \\
\hline
fannkuch & ??? & ??? & ??? \\
\hline
fasta & 400000000 & 2 & 3.039 \\
\hline
fasta-redux & 400000000 & 4 & 2.566 \\
\hline
mbrot & 256000000 & 15 & 6.553 \\
\hline
mbrot-large & 1024000000 & 15 & 6.345 \\
\hline
n-body & 50000000 & 3 & 2.543 \\
\hline
n-body-large & 500000000 & 3 & 2.329 \\
\hline
rev-comp & 6172843 & 8 & 3.589 \\
\hline
sp-norm & 1210000000 & 2 & 0.752 \\
\hline
sp-norm-large & 19360000000 & 2 & 0.756 \\
\hline
\end{tabular}
\caption{\label{tab:sameFun} Cost of an OSR transition to the same function.}
\end{table}