BeagleBone slow inbound net I/O

[Brett Wynkoop]

On Sat, 14 Mar 2015 00:51:04 +0100
Bernd Walter <ticso at cicely7.cicely.de> wrote:

> On Fri, Mar 13, 2015 at 12:18:34PM -0600, Ian Lepore wrote:
> > On Thu, 2015-03-12 at 23:26 -0400, Brett Wynkoop wrote:
> > > Greeting-
> > > 
> > > It is confirmed, the net I/O is much slower than reading from the
> > > SD card.  Here is another run of tar - pipe - tar, but this time
> > > the source is the sd card and the destination is still the USB
> > > zfs.
> > [...]
> > > 
> > 
> > You're not actually testing network performance, you're testing a
> > confusing mashup of overall system performance.
> >
Ian your point is well taken, but one can have a system where each part
works fine on it's own, but when working in concert there is a
breakdown.

I believe that is what I have observed.  Reading from sd card and
writing to usb was many times faster than reading from ethernet and
writing to usb.

I would say I am testing the case where the source of the
data is over the ethernet port and the destination is on the USB
Flash.  I will try grabbing data over the net and sending it
to /dev/null, but if we have trouble moving bits from ethernet to USB I
would say that is something that we might want to investigate.


-Brett


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