Enhancements, fixups
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4 changed files with 423 additions and 17 deletions
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@ -31,20 +31,32 @@
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\end{tightitemize}
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\end{tightitemize}
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\end{column}
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\end{column}
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\end{columns}
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\end{columns}
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\pause{}
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\begin{center}
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\textbf{\alert{These pieces can (mostly) be modeled independently!}}
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\end{center}
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\end{frame}
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\end{frame}
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\begin{frame}{Dependencies and the ROB}
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\begin{frame}{Dependencies and the ROB}
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\begin{columns}
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\begin{column}{0.35\textwidth}
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\begin{center}
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\includegraphics[width=\textwidth]{cpu_frontend.svg}
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\end{center}
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\end{column}
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\hfill
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\begin{column}{0.64\textwidth}
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\begin{tightitemize}{0pt}
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\begin{itemize}
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\begin{itemize}
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\item Dependencies can stall execution
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\item Dependencies can stall execution
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\item Maybe instructions further down can be executed right now?
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\item Maybe instructions further down can be executed right now?
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\end{itemize}
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\begin{center}
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\textbf{\alert{$\to$ Out-of-Order CPUs}}
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\end{center}
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\begin{itemize}
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\item ROB: circular buffer of \uops{}
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\item ROB: circular buffer of \uops{}
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\item First possible instruction is issued
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\item First possible instruction is issued
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\end{itemize}
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\end{itemize}
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\end{tightitemize}
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\end{column}
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\end{columns}
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\end{frame}
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\end{frame}
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\begin{frame}{How do we get insights from this complex system?}
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\begin{frame}{How do we get insights from this complex system?}
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@ -101,13 +113,16 @@
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\item \alert{\uica{}} and \alert{\uopsinfo{}}: research, good accuracy.
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\item \alert{\uica{}} and \alert{\uopsinfo{}}: research, good accuracy.
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Intel CPUs.
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Intel CPUs.
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\item \alert{\ithemal{}}: machine-learning based.
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\item \alert{\ithemal{}}: machine-learning based.
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\item \alert{\gus{}}: instrumentation-based code analyzer (not
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static) $\leadsto$ slow. Access to mode information. Made in the
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CORSE team.
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\end{itemize}
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\end{itemize}
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\bigskip
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Except Ithemal, \alert{all} are (to some extent) based on manually-made
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Except Ithemal, \alert{all} are (to some extent) based on manually-made
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models!
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models!\\
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\pause{}
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\bigskip{}
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\begin{center}
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\textbf{\alert{Ambition:}} \alert{automated} model generation.
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\end{center}
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\end{frame}
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\end{frame}
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\begin{frame}{When I started my PhD\ldots}
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\begin{frame}{When I started my PhD\ldots}
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@ -67,7 +67,7 @@
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\item{} Measure to verify
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\item{} Measure to verify
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\bigskip
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\bigskip
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\item{} If so, \textbf{\[
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\item{} If so, \textbf{\[
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\mucount{i} = 3 \cyc{\kerK_{k_0}} - k
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\mucount{i} = 3 \cyc{\kerK_{k_0}} - k_0
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\]}
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\]}
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\end{itemize}
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\end{itemize}
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@ -36,6 +36,7 @@ loop:
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\begin{itemize}
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\begin{itemize}
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\item Instrument full kernel $\kerK$: for each basic block,
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\item Instrument full kernel $\kerK$: for each basic block,
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$\operatorname{occur}(\text{bb})$
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$\operatorname{occur}(\text{bb})$
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\item Measure total kernel time \textbf{in context}
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\item For each tool
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\item For each tool
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\begin{itemize}
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\begin{itemize}
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\item for each bb,
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\item for each bb,
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@ -47,7 +48,6 @@ loop:
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\operatorname{prediction}(\text{bb})
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\operatorname{prediction}(\text{bb})
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\]
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\]
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\end{itemize}
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\end{itemize}
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\item Measure total kernel time
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\end{itemize}
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\end{itemize}
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\pause
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\pause
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391
slides/assets/imgs/20_foundations/cpu_frontend.svg
Normal file
391
slides/assets/imgs/20_foundations/cpu_frontend.svg
Normal file
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@ -0,0 +1,391 @@
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id="text5-1"><tspan
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id="text12"><tspan
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id="tspan12"
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x="65.290894"
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y="61.694405">Reorder buffer (ROB)</tspan></text>
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xml:space="preserve"
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id="tspan12-6"
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After Width: | Height: | Size: 17 KiB |
Loading…
Reference in a new issue