[Bug 210488] ue0 axge AX88179 Ierrs errors under havy network load

[bugzilla-noreply at freebsd.org]

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=210488

--- Comment #8 from Pyun YongHyeon <yongari at FreeBSD.org> ---
(In reply to mtatarin76 from comment #7)
Probably you can put flow control options to '/etc/start_if.ue0'
file as a workaround(Not tested though).

Enabling flow-control by default in driver would be a POLA
violation so I wanted to mitigate the issue when flow-control is
not active.  However, it seems there is no good way to mitigate
the issue without increasing H/W RX FIFO size.  The hardware have a
fixed sized buffer so we may have to rely on other way like
flow-control to mitigate that.
The issue shall frequently happen when the controller operates at
high-speed(USB 2.0) and established link is 1000baseT(i.e. the
network bottleneck is USB 2.0 bus).  I contacted the vendor to get
more information on the issue so let's see how it goes.  If the
vendor confirms my theory, documenting it in axge(4) would be best
one.

I guess you may see better result when you plug the controller to
USB 3.0 port.  Due to lack of H/W, I wasn't able to test that.

Thanks for testing!

-- 
You are receiving this mail because:
You are the assignee for the bug.