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OLIMEX / OLINUXINO

OLINUXINO is Open Source / Open Hardware, low cost from EUR 24 Linux Industrial grade Single Board Computer capable to operate -25+85C
www.olimex.com
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A20-OLinuXino Linux uses kernel default qdisc #88

Open androidcho opened 3 years ago

androidcho commented 3 years ago

After some research I have found that the kernel's default "qdisc pfifo_fast" is used (or more likely not set). It uses it for both the ETH interface of A20-LIME2 and the SocketCAN interface. Setting "qdisc fq_codel" improved the ethernet link quality alot. Setting "qdisc noqueue" for the CAN interface stopped it losing CAN frames.

DanKoloff commented 3 years ago

Which Linux image did you use? One of the Olimage images?

androidcho commented 3 years ago

Which Linux image did you use? One of the Olimage images? To be precise: A20-OLinuXino-buster-minimal-20210318-122357.img

DanKoloff commented 3 years ago

Perfect, thanks for this info and sharing your experience and advice. I will point the developers to this note to look into it.