BPI-R2 slow ethernet speed

(Johnny) #41

@bluelightning32 - thank you very much for the extensive test results. Unusual behavior! nothing obvious springs to mind, the relative performance is definitely indicative of something, it narrows down the possibilities for sure. It ‘feels’ like a bus contention issue or some kind of buffer-overflow problem as you suggest - but it’s nothing that I’ve personally encountered before with networking gear


Glad see the damn breaking on this issue. I had to resort to other hardware to keep my project going but would circle back to the R2 if someone needs a solution tested here. bluelightning32’s results appear consistent with with problems/experiments I did.


Any updates on this?

I’m observing a similar problem, but much worse than @bluelightning32. When downloading through the Masquerading of the BPI R2 I only get a few hundreds of kbit/s. This makes the R2 not usable as a router for me right now.

When downloading to the Pi itself or uploading through it the speed is ok, though. I can also confirm, that there is a difference between multiple kinds of data. With if=/dev/zero it is fast, but with if=/dev/urandom it is slow. Also just downloading files through it (e.g. debian dvd iso) is around the same few hundreds of kbit/s.

I’ve tried with the official (https://github.com/BPI-SINOVOIP/BPI-R2-bsp) and @frank-w s (https://github.com/frank-w/BPI-R2-4.14) kernel and also with hwnat(http://www.fw-web.de/dokuwiki/doku.php?id=en:bpi-r2:hwnat) on.

I will be doing some more detailed tests later this week and will post the output as well as my configuration here.