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title               : Measuring the Latency of Graphics Frameworks on X11-Based Systems
date_date           : 2023-04-23
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authors_            : [[people:andreas_schmid|Andreas Schmid]], [[people:raphael_wimmer|Raphael Wimmer]]
epub_url            : https://epub.uni-regensburg.de/54287/1/framework-latency-authorversion.pdf
publisher_url       : https://dl.acm.org/doi/10.1145/3544549.3585779
pdf_url             : https://epub.uni-regensburg.de/54287/1/framework-latency-authorversion.pdf
bibtex_url          : https://epub.uni-regensburg.de/cgi/export/eprint/54287/BibTeX/epub-eprint-54287.bib
video_url           : 
doi                 : 10.1145/3544549.3585779
photo_img           : projects:framework-latency:fw_latency_fig1.png
short-description   : We implemented and evaluated a new method for measuring the latency added by different graphics frameworks and toolkits on X11-based systems.
abstract            : Latency is an intrinsic property of all human-computer systems. As it can affect user experience and performance, it should be kept as low as possible for real-time applications. To identify the source of latency, measuring partial latencies is necessary. We present a new method for measuring the latency of graphics frameworks on X11-based systems. Our tool measures the time between an input event arriving at the kernel until a pixel is updated in graphics memory. In a systematic evaluation with 36 test applications, we found that our method delivers consistent results for most tested frameworks, and does not add a significant amount of additional end-to-end latency. Even though further investigation is required to explain inconsistencies with Qt-based frameworks, our method measures the latency of graphics frameworks reliably and accurately in all other cases.
published-in        : Extended Abstracts of the 2023 CHI Conference on Human Factors in Computing Systems
project             : latency
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