Hi Sergei,
On Sun, Jan 27, 2019 at 6:41 PM Sergei Shtylyov
<sergei.shtylyov@xxxxxxxxxxxxxxxxxx> wrote:
> The R-Mobile A1 (R8A7740) SoC manual describes the Ether MAC's RX checksum
> offload the same way as it's implemented in the EtherAVB MAC...
>
> Signed-off-by: Sergei Shtylyov <sergei.shtylyov@xxxxxxxxxxxxxxxxxx>
Thanks for your patch!
Running netperf as described in patch 2/7, perf tells me there's a reduction
for csum_partial from ca. 1.9% to 0.01%, so this feature seems to work.
Hence:
Tested-by: Geert Uytterhoeven <geert+renesas@xxxxxxxxx>
However, while effective according to perf results, using ethtool to
enable/disable
the feature prints an error message:
root@armadillo:~# ethtool -K eth0 rx on
Cannot get device udp-fragmentation-offload settings: Operation not supported
Cannot get device udp-fragmentation-offload settings: Operation not supported
root@armadillo:~# ethtool -K eth0 rx off
Cannot get device udp-fragmentation-offload settings: Operation not supported
Cannot get device udp-fragmentation-offload settings: Operation not supported
root@armadillo:~#
Do you have any clue?
Does this needs testing on R-Mobile A1 with VLAN enabled, too, or is that
independent from the underlying sh-eth hardware version?
Gr{oetje,eeting}s,
Geert
--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@xxxxxxxxxxxxxx
In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
-- Linus Torvalds
