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How to reduce CPU consumption of QtWebEngine?

Question asked by Cyril Franceschini on May 25, 2018
Latest reply on May 27, 2018 by igorpadykov

I wrote an app in Qt using the QtWebEngine component with EGLES to display a simple Web page with SVG elements on a 7" LVDS screen. The app is running on a UDOO Neo board and over a custom Linux installation built with OpenEmbeded with this meta-udoo layer: with meta-freescale and meta-qt5.


After a while, I've seen the screen starting to freeze and the QWebEngineProcess crashing randomly. The CPU usage of the QWebEngineProcess is about 40% and the temperature goes up to 55°C and over 65°C when the UDOO Neo is put in a box!


When the screen starts to freeze, I get a kernel message: GPU too hot!


Here is the output of the ps -aux command:

root       456  0.0  1.8  92624 18792 ?        S    May24   0:00 /usr/lib/qt5/libexec/QtWebEngineProcess --type=zygote --lang=C root       476 39.1 10.1 291900 104396 ?       Sl   May24 355:07 /usr/lib/qt5/libexec/QtWebEngineProcess --type=renderer --disable-accelerated-video-decode --enable-overlay-scrollbar --enable-pinch --enable-threaded-compositing --enable-viewport --main-frame-resizes-are-orien