Hello Guys,
@hdegoede
I was just wandering where we stand with having the u-boot including a
specific definition for the R1 . I noticed that last month, Jun 15 there
was a patch submitted by 'fabioca' to include the R1 into u-boot "New
sunxi board: Lamobo Bananapi R1
<http://u-boot.10912.n7.nabble.com/New-sunxi-board-Lamobo-Bananapi-R1-tp217120.html>"
. Is there a possibility that this could get into the next u-boot
release v2015.07 ? The reason is that , the R1 needs more specific
treatment of the CONFIG_GMAC_TX_DELAY then the rest of the bananapi
family . So it would be good to have Fabio's patch in but perhaps with a
different value for CONFIG_GMAC_TX_DELAY=4 , as suggested by Thomas
Kaiser here :
http://comments.gmane.org/gmane.comp.hardware.netbook.arm.sunxi/17495
and Igor P. here :
https://github.com/igorpecovnik/lib/blob/next/patch/add-lamobo-r1-uboot.patch
The layout for the R1 board is different to that of the other bananapi
boards , so perhaps the setting of 4 is more appropriate . The best
throughput testing that I have achieved with the R1 , using the u-boot
v2015.04 (which has the generic bananapi setting of
CONFIG_GMAC_TX_DELAY=3) is 290 Mbits/sec :
iperf -c 192.168.1.153 -t 30 -u -b 1g
------------------------------------------------------------
Client connecting to 192.168.1.153, UDP port 5001
Sending 1470 byte datagrams, IPG target: 11.76 us (kalman adjust)
UDP buffer size: 160 KByte (default)
------------------------------------------------------------
[ 3] local 192.168.1.1 port 58279 connected with 192.168.1.153 port 5001
[ ID] Interval Transfer Bandwidth
[ 3] 0.0-30.0 sec 1.01 GBytes 290 Mbits/sec
[ 3] Sent 738867 datagrams
[ 3] Server Report:
[ 3] 0.0-30.0 sec 1.01 GBytes 290 Mbits/sec 0.056 ms 7/738867
(0.00095%)
Perhaps with setting of 4 , we can improve this . On the wiki Thomas
mentions "noone achieved more than 370/460 Mbits/sec TX/RX using iperf"
with this setting . Which is quite a bit better than what I am getting
now . It may not be the whole solution , but definitely a step in the
right direction .
Best Regards
Milorad
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