123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172 |
- \documentclass{JINST}
- \usepackage{lineno}
- \usepackage{ifthen}
- \newboolean{draft}
- \setboolean{draft}{true}
- \title{A high-throughput readout architecture based on PCIe Gen3 and DirectGMA technology}
- \author{N.~Zilio$^b$,
- M.~Weber$^a$\\
- \llap{$^a$}Institute for Data Processing and Electronics,\\
- Karlsruhe Institute of Technology (KIT),\\
- Herrmann-von-Helmholtz-Platz 1, Karlsruhe, Germany\\
- \llap{$^b$}Somewhere in France
- }
- \abstract{Abstract}
- \begin{document}
- \ifdraft
- \setpagewiselinenumbers
- \linenumbers
- \fi
- \section{Introduction}
- Citation~\cite{lonardo2015nanet}
- \section{Architecture}
- \subsection{Host interface}
- On the host side, AMD's DirectGMA technology, an implementation of the
- bus-addressable memory extension for OpenCL 1.1+, is used to prepare GPU buffers
- for writing data by FPGA as well as mapping the remote FPGA device for writing
- signals. To write into the GPU, the physical bus address of the GPU buffer is
- determined with a call to \texttt{clEnqueueMakeBuffersResidentAMD}. The address
- is written to an FPGA register and updated for each successful transfer of one
- or more pages of data. Due to hardware restrictions the largest possible GPU
- buffer sizes are about 95 MB. Larger transfers are achieved with a double
- buffering mechanism (MV: we should measure intra-GPU data transfers).
- \section{Results}
- \begin{figure}
- \includegraphics[width=\textwidth]{figures/intra-copy.png}
- \caption{Throughput in MB/s for an intra-GPU data transfer of smaller block
- sizes (4KB -- 24 MB) into a larger destination buffer (32 MB -- 128 MB). The lower
- performance for smaller block sizes is caused by the larger amount of transfers
- required to fill the destination buffer. The throughput has been estimated using
- the host side wall clock time. On-GPU data transfer is about twice as fast.}
- \label{fig:intra-copy}
- \end{figure}
- \section{Conclusion}
- \acknowledgments
- UFO? KSETA?
- \bibliographystyle{JHEP}
- \bibliography{literature}
- \end{document}
|