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edits (eval)

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carlnues@buffalo.edu 2023-08-25 22:04:38 -04:00
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sections/evaluation.tex
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@ -106,6 +106,7 @@ The \textbf{Spotify} workload starts the app searches for a common musical selec
It starts the first suggestion and waits for 30 seconds while the audio plays with the app in the foreground.
Lastly, the \textbf{Combined} workload examines the system under commonplace additional stress.
It runs the original Facebook workload in the foreground while the Spotify app streams audio continuously in the background.
These workloads address evaluation claim (iii).
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\subsection{Screen Jank}
@ -129,7 +130,7 @@ In summary: \systemname, with a considerably simpler policy mechanism, offers e
To attribute the improvement in performance, we measure the CPU frequencies selected by \schedutil and \systemname, respectively.
\Cref{fig:time_per_freq_fb,fig:time_per_freq_yt,fig:time_per_freq_spot} plot a CDF of the difference between these two selections.
This addresses claim (iv) from above:
This addresses evaluation claim (iv) from above:
We note that for a significant fraction of the workload (5\% for Facebook, 15\% for Youtube, 12\% for Spotify), the frequency selected by \schedutil is significantly (up to 50\%) lower.
This is \schedutil's ramp-up period, where it selects frequencies lower than $\fenergy$.
We attribute the improved performance for both governors to eliminating the ramp-up period where \systemname selects speeds below $\fenergy$.
@ -163,8 +164,10 @@ In common settings, background load does not pose a threat to the performance of
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\subsection{Energy Usage}
\Cref{fig:energy_allapps} show frame drop rates for the three workloads.
\todo{discuss}
\Cref{fig:energy_allapps} shows energy usage for the four workloads, addressing the last aspect of evaluation claims (i) and (ii).
The Facebook workload under \systemname saves significant (>10\%) energy compared to the default.
Indeed, several non-default policies also best \schedutil.
Youtube
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