Re: Suboptimal iperf3 performance on RockPro64

[Sad Clouds <cryintothebluesky%gmail.com@localhost>]

On Fri, 14 Aug 2020 15:05:27 -0400
Jason Mitchell <jmitchel%bigjar.com@localhost> wrote:

> On 8/14/20 4:14 AM, Sad Clouds wrote:
> > On Thu, 13 Aug 2020 20:53:26 -0400
> > Jason Mitchell <jmitchel%bigjar.com@localhost> wrote:
> >
> >> Hello,
> >>
> >> I have a project where I need to be able to saturate a gigabit
> >> link. I’m using a RockPro64 running 9.0_STABLE. I’m using an Intel
> >> i210 PCI-e NIC and I can’t get more than 740Mbit/sec on iperf3.
> >> I’ve enabled tcp4csum, udp4csum & ip4csum offloading and I’ve set
> >> the CPU speeds to max (1416 for the Cortex-A53’s and 1800 for the
> >> Cortex-A72’s).
> > Try running multiple streams, this usually improves throughput. Also
> > remember that Gigabit Ethernet is full-duplex, so "saturating" it
> > would require sending and receiving at the same time, i.e. around 2
> > Gbits/sec combined throughput, although you're very likely to get
> > less due to other overheads, etc.
> 
> I knew I forgot to mention something :( I've tried up to 4 streams
> with no change. And I'm using 9.0_STABLE at the moment although a
> current kernel didn't change anything.
> 
> 

Then I guess you've hit the limit, either the driver or network
hardware.