Date: Thu, 24 Jun 2021 10:43:31 +0100 From: Denis Ovsienko <denis@ovsienko.info> To: Paul Zimmerman <pauldzim@gmail.com> Cc: MJ <mafsys1234@gmail.com>, Mark Millard via freebsd-arm <freebsd-arm@freebsd.org> Subject: Re: Raspberry Pi 3B+ and pitiful network speeds Message-ID: <20210624104331.3f21429d@basepc> In-Reply-To: <CADBGO7--z6_pHxjhW_P7aCF1q8QJhN8v=Dn%2BCVbcXDjzr-S=jA@mail.gmail.com> References: <CADBGO7--z6_pHxjhW_P7aCF1q8QJhN8v=Dn%2BCVbcXDjzr-S=jA@mail.gmail.com>
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On Thu, 24 Jun 2021 01:51:39 -0700
Paul Zimmerman <pauldzim@gmail.com> 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
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