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Detail a bit more about profilers

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Théophile Bastian 2018-08-07 11:29:21 +02:00
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@ -822,16 +822,17 @@ Listing~\ref{lst:ex1_dw}, etc.
\subsection{Presentation of \prog{perf}} \subsection{Presentation of \prog{perf}}
\prog{Perf} is a \emph{profiler} that comes with the Linux ecosystem (actually, \prog{Perf} is a \emph{profiler} that comes with the Linux ecosystem (actually,
\prog{perf} is developed within the Linux kernel source tree). A profiler is a \prog{perf} is developed within the Linux kernel source tree). A profiler is an
program that analyzes the performance of programs by recording the time spent important tool from the developer's toolbox that analyzes the performance of
in each function, including within nested calls. programs by recording the time spent in each function, including within nested
calls. This analysis often enables programmers to optimize critical paths and
functions in their programs, while leaving unoptimized functions that are
seldom traversed.
For this purpose, the basic idea is to stop the traced program at regular For this purpose, the basic idea is to stop the traced program at regular
intervals, unwind its stack, write down the current nested function calls, and intervals, unwind its stack, write down the current nested function calls, and
integrate the sampled data in the end. integrate the sampled data in the end.
\todo{Is it necessary to write more about \prog{perf} here?}
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
\subsection{Benchmarking with \prog{perf}}\label{ssec:bench_perf} \subsection{Benchmarking with \prog{perf}}\label{ssec:bench_perf}