exercise-optional-1.tex

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% ========== Edit your name here
%\author{Your Name}
\title{\coursename~Quiz Optional 1: Due by 11/5/2021}
\date{}
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% ========== Begin answering questions here


\section*{Programming exercises}

\begin{lstlisting}

double result = 0;
size_t n = 1e6;
for(size_t i = 0 ; i < n ; i++)
{
	result -= std::power(x,i)/i;
}

\end{lstlisting} 


\begin{enumerate}

\item
Asynchronous programming using the C++ standard library  (10 credits): \\
\begin{enumerate}
\item Write a function to compute a slice of the above \lstinline{for} loop.
\item Split the computation in 2 partitions and use \lstinline{std::async} and \lstinline{std::future} to compute the partial results concurrently. 
\item Now, use a \lstinline{std::vector<std::future<double>>} to compute the result for an arbitrary number of partitions $m$.
\end{enumerate}


\item Asynchronous programming using HPX (10 credits)\\

\begin{enumerate}
\item Repeat the above steps using HPX.
\item Use \lstinline{hpx::when_all().then()} to gather the results.
\item Use \lstinline{hpx::dataflow} to gather the results.
\end{enumerate}


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\end{enumerate}

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