Re: Raspberry Pi 3B+ and pitiful network speeds

From: Denis Ovsienko <>
Date: Thu, 24 Jun 2021 09:43:31 UTC
On Thu, 24 Jun 2021 01:51:39 -0700
Paul Zimmerman <> wrote:

> I think the performance difference you are seeing vs. NetBSD might be
> because the FreeBSD USB driver for the RPI3 and below does not use
> interrupts, so all the USB transfers are polled. The NetBSD USB driver
> is borrowed from OpenBSD, which in turn is borrowed from the mainline
> Linux driver, which does use interrupts.

Thank you for this information Paul. Do you know why RPI3B on 1.2GHz
can reach 100Mb/s (150Mb/s in duplex) and RPI3B+ on 1.4GHz maxes out at
90 Mb/s?

    Denis Ovsienko